608.01 485 ITEM 608 WALKS, CURB RAMP S, AND STEPS
608.01 Description
608.02 Materials
608.03 Concrete Walks
608.04 Asphalt Concrete Walks
608.05 Crushed Aggregate Walks
608.06 Concrete Steps
608.07 Curb Ramps
608.08 Method of M easurement
608.09 Basis of Payment
608.01 Description. This work consists of constructing walks, curb ramps, and
steps as per plans, specifications and standard drawings.
608.02 Materials. Furnish materials conforming to:
Aggregate Base ................................ .... 304.01 and 304.02 Asphalt concrete Type 1 ................................ .............. 441 Concrete, Class QC Misc . or QC 1* ........................... 499 Reinforcing steel ................................ ..................... 509.02 Liquid Membrane -Forming Compounds for Curing Concrete ................................ ........... 705.07 Concrete Sealers, non -epoxy ............................... 705.23B Crushed aggregate meeting grading requirements of ................................ ..... 703.10 Detecta ble Warning Devices ................................ ... 712.14 Expansion joint material ................................ ......... 705.03 * Replacing Coarse aggregate in the concrete mixes with Recycled Concrete Aggregate conforming to Supplement 1117 is an option.
608.03 Concrete Walks . Construct concrete walks as follows:
A.Excavation. Excavate to the required depth and to a width that allows installation and bracing of forms. Shape and uniformly compact the subgrade to a surface conforming to the plans.
B.Forms. Use either fixed forms or slip -form methods. For fixed -form construction, use wooden or metal forms that extend the full depth of the concrete and that do not spring under the concrete pressure. For slip -form construction, perform the work according to 609.04.C.
C.Placing and Finishing . Immediately before placing co ncrete, thoroughly moisten the subgrade. Deposit concrete in a single layer, strike it off with a template, and smooth it with a float to obtain a sandy texture. Do not plaster the concrete. Use a 1/4 inch (6 mm) radius edging tool to edge all outside edg es and joints. Divide the surface of the walks into equally spaced rectangular blocks at approximately 5 foot (1.5 m) intervals. Saw or form transverse joints to a depth of not less than one -fourth the thickness of the slab and to a width of approximately 1/8 inch (3 mm). Install 1/2 inch (13 mm) thick expansion joint filler between the walk and any fixed structure that extends the full depth of the walk. Install 1 inch (25 mm) thick expansion joint filler between the walk and the back of curb that is on a 250 foot (75 608.04 486 m) or smaller radius, such as at street intersections . Follow Item 511.12 for concrete placement during cold weather conditions .
D.Slope. Construct the surface of the walk with a maximum transverse slope rate of 0.02 and with the low side adjacent to the roadway.
E.Curing and Treating . Cure concrete according to Item 451 .11. After the minimum curing period and a 30 day drying time apply an approved non -epoxy sealer (705.23.B) according to Item 512. Ensure any remaining curing compounds that are incompatible with the selected sealer and all foreign materials are removed prior to sealer treatment.
608.04 Asphalt Concrete Walks . Construct asphalt concrete walks as follows:
A.Excavation and Forms . Excavate and construct forms according to 608.03.A and 608.03.B.
B.Base . Place and thoroughly compact aggregate base in layers not e xceeding 4 inches (100 mm) in depth.
C.Asphalt Placement and Compaction . Place asphalt concrete in one or more courses to provide the required depth. Compact using a hand roller or power roller of a type and weight acceptable to the Engineer.
608.05 Crush ed Aggregate Walks . Construct crushed aggregate walks as
follows:
A.Excavation. Excavate according to 608.03.A.
B.Forms . Construct forms of wood or metal of acceptable rigidity and to the depth of the necessary loose material. Back forms with compacted s oil to the height of the completed walk.
C.Aggregate Placement and Compaction. Place aggregate in one or more courses to provide the required depth. Compact using equipment of a type and weight acceptable to the Engineer.
608.06 Concrete Steps. Construct concrete steps as follows:
A.Excavation and Forms. Excavate and construct forms according to 608.03.A and 608.03.B.
B.Placi ng and Finishing . Place and finish concrete according to Item 511.15, and 511.18, except finish the treads of steps to produce a sandy texture according to
511.07 .
C.Slope. Slope step treads at a rate of 0.01 and toward the next lower step.
D.Curing and Treating . Cure and treat steps according to 608.03.E.
E.Railing. If specified, install hand railing according to Item 517.
608.07 Curb Ramps. Excavate, form, place, finish, and cure according to
608.03 A, 608.03.B, 608.03.C, and 608.03.E. Finish ramps to a rougher final surface
texture than the adjacent walk and with striations transverse to the ramp slope using a coarse broom or other method approved by the Engineer. 608.08 487 Provide detectable warning devices conforming to 712.14 in curb ramps. Install the detectable warning devices according to manufacturer’s written recommendations and standard drawings. Provide a warranty to conform with the requirements of 712.14. Provide the manufacturer’s written installation instructions and the 5 year warranty to the Engineer at or before the pre -construction meeting.
608.08 Method of Measurement. The Department will measure Concrete
Walk, Asphalt Concrete Walk, and Aggregate Walk by the number of square feet (square meters) of finished surface, complete in place. The Department will measure curb ramps by the number of square feet (square meters) completed. The Department will measure det ectable warnings in existing curb ramps and at grade crossings by the number of square feet (square meters) completed. The Department will measure Concrete Steps by the number of feet (meters), along the front edge of each tread. Where steps are constructe d with integral walls, the Department will include the thickness of the integral walls with the tread width measurement.
608.09 Basis of Payment . Payment for walks, curb ramps, detectable warnings,
and steps is full compensation for excavation, backfill, concrete cutting/sawing, base course material, reinforcing steel, hand railing, expansion joint materials, and any incidentals required to complete the installation as specified. The Department will pay for accepted quantities at the contract prices as fol lows: Item Unit Description 608 Square Foot Concrete Walk (Square Meter) 608 Square Foot Asphalt Concrete Walk (Square Meter) 608 Square Foot Aggregate Walk (Square Meter) 608 Square Foot Curb Ramp (Square Meter) 608 Square Foot Detectable Warning (Square Meter) 608 Foot (Meter) Concrete Steps ITEM 609 CURBING, CO NCRETE MEDIANS, AND TRAFFIC ISLANDS
609.01 Description
609.02 Materials
609.03 Stone Curb
609.04 Cast -in-Place Concrete Curb and Combination Curb and Gutter
609.05 Asphalt Concrete Curb
609.06 Concrete Median and Traffic Island
609.07 Method of Measurement
609.08 Basis of Payment 609.01
609.01 Description . This work consists of furnishing and constructing curb,
combination curb and gutter, medians, and traffic islands. This work also consists of excavating, backfilling, furnishing and installing joint materials, and disposing of surplus excavation and discarded materials according to Item 203.
609.02 Materials. Furnish materials conforming to:
Concrete, Class QC Misc . or QC 1* ............................ 499 Preformed filler ................................ ...................... 705.03 Liquid Membrane -Forming Compounds for Curing Concrete ................................ ........... 705.07 Concrete Sealers, non -epoxy…………………...705.23 . B Tie bar steel, epoxy coated ................................ ..... 709.00, 709.01, 709.03, 709.05 Coated dowel bars ................................ .................. 709.13 * Replacing Coarse aggregate in the concrete mix es with Recycled Concrete Aggregate conforming to Supplement 1117 is an option Furnish the best quality of Berea or Amherst gray sandstone, or sandstone of equal quality. Furnish asphalt concrete curb conforming to 441 Type 1 intermediate course. Conform the asphalt concrete to the composition requirements with the fine aggregate content set at the maximum allowed under this composition. Provided the Contractor meets the composition requirements, the Contractor may add mineral filler conforming to 703.07. Add the mineral filler using a method approved by OMM.
609.03 Stone Curb
A.Cutting and Dressing . Ensure that 95 percent of all straight curb pieces are at least 5 feet (1.5 m) long, with no pieces less than 42 inches (1.1 m). The Contractor may use a piece as short as 30 inches (0.8 m) for closure. For curves with a radius of 50 feet (15 m) or greater, the Contractor may use radially jointed straight curb pieces between 36 and 42 inches (0.9 and 1.1 m) long. For curves and corners with a radius of less than 50 feet (15 m), use pieces a minimum of 36 inches (0.9 m) long, and dress, joint, and set pieces to the radii specified. For all curves and corners, use curb sections that are approximately uniform in length. Dress all curb to a straight edge on top and on the exposed face and ends to a depth of at least 6 inches (150 mm) below the gutter elevation. Dress the ends at right angles to the face for straight curb and radially for curb on curves. Do not allow slack or hollow joints. Do not leave any proje ctions after dressing the ends of any curb section that exceed 1/8 inch (3 mm) from the plane of the end of that section. Cut the edge next to the gutter to a 3 inch (75 mm) radius and dress the top to a 1/4 inch (6 mm) bevel rising from the exposed face . Use a pitching tool on the edge at the back to hand dress curb to the specified width.
B.Setting. Set the curb on a thoroughly compacted subgrade and with a 1 in 20 batter from the vertical backward from the gutter. Place a minimum 3 inch (75 mm) thick firm bed of aggregate material as a foundation for the curb. Use a heavy rammer to settle the curb into place. Place and compact a minimum 4 inch (100 mm) 609.04 489 wide aggregate backfill behind the curb to within 6 inches (150 mm) of the top. Bring the balance of the backfill to the level of the top of the curb for a distance of 2 feet (0.6 m) behind the curb with soil or other acceptable material. Thoroughly tamp the backing in layers not exceeding 6 inches (150 mm) in thickness, loose measurement, with an appr oved tamper or rammer. Perform as much of the backfilling and tamping as is consistent with alignment of the curb at the time the stone is first set. Set curb on curves in plastic concrete 6 inches (150 mm) thick as shown on the plans. Extend concrete the width of the curb plus 6 inches (150 mm) behind the curb, and bring concrete up behind the curb to within 4 inches (100 mm) of the top.
C.Joints. Set curbs such that below the dressed portions the space between ends of adjacent sections of curbing is not less than 1/8 inch (3 mm) at any point and not more than 4 inches (100 mm). Cushion the joints between the dressed portions of adjacent sections of curbing with 1/8 -inch (3 mm) thick expansion joint material. Trim expansion joint material flush with the c urbing on all edges. If placing sandstone curb after placing pavement, fill remaining joints with dry sand to within 2 inches (50 mm) of the surface of the pavement, and fill to the pavement surface with asphalt concrete. Take care in filling this joint so that no asphalt concrete comes in contact with the exposed surface of the curb.
D.Reusing Existing as New Curb. If specifically allowed by the plans, and to the extent available, use acceptable stone curb sections removed under Item 202 instead of furni shing new stone curb. Use salvaged curb at locations designated by the Engineer. Place all salvaged sections of curb continuously without interspersing salvaged and new curb sections. Haul and store salvaged curb as necessary. Cut, dress, set, and install joints in salvaged curbs according to the requirements for new curbs.
609.04 Cast -in-Place Concrete Curb and Combination Curb and Gutter .
A.Forms and Joints. Use approved steel forms for curbs. Securely brace and hold forms to the line and grade shown o n the plans. The Contractor may use approved flexible forms of steel or wood to construct curved curb with a radius of 200 feet (60 m) or less. Immediately before placing concrete, clean the inner surface of the forms, and coat this surface with a form rel ease agent. Where curb and combination curb and gutter is not constructed integral with, or tied to, the base or pavement, construct 1/4 -inch (6 mm) wide contraction joints at 10 feet (3 m) intervals using steel separator plates, a grooving tool, or a saw according to Item 451. For combination curb and gutter, construct the joint to an average depth of 2 inches (50 mm) or more. For curb, construct the joint to an average depth of one -fifth or more of the curb height. Where expansion joints occur in the abutting pavement, separate the section being placed with 1 inch (25 mm) thick 705.03 preformed filler. Where the curb is integral with, or tied to, the base or pavement, construct the same type of joints as used in the pavement. Space joints identically with the joints in the base or pavement. 609.05 490 Leave curb forms in place until their removal will not crack, shatter, or otherwise injure the concrete. Do not seal transverse joints in cast -in-place concrete curb and combination curb and gutter. If curbs are to later serve as a support for a finishing machine in the placing of a surface course, align supporting edges so that the distance between the curbs is within 1/2 inch (13 mm) from that specified.
B.Placing. Place concrete in forms prepared as described abo ve, and vibrate the concrete to eliminate all voids. Place concrete for curb that is integral with the concrete base or pavement while the base or pavement concrete is plastic. Where the presence of the finishing equipment on the forms at the end of the da y’s run prevents completing the curb, install No. 5 (No. 16M) tie bars vertically in the pavement at 1 foot (0.3 m) intervals and in a line 3 inches (75 mm) inside of and parallel to the pavement edge. Install these tie bars to within 1 1/2 inches (38 mm) of the subgrade or subbase and 2 inches (50 mm) above the concrete base or pavement surface. Water cure this horizontal construction joint between the concrete base or pavement and the curb, or membrane cure the concrete base or pavement and remove the me mbrane before placing the curb. Immediately before placing the concrete curb, brush mortar (consisting of one part cement to two parts sand with enough water to form a workable mortar) into the surface area of the hardened concrete pavement or base where t he curb is to be placed. Do not allow the mortar to dry before placing the curb on top of it.
C.Slip-Form Placement. The Contractor may use a self -propelled machine to place concrete curb or curb and gutter. Force the concrete through a mold of the proper cross -section to obtain the proper density and cross -section. If using a track, set and secure the track on which the machine operates to the exact line and grade given by the Engineer. Use concrete of a consistency that provides the desired shape and rem ains as placed without slumping of the vertical faces.
D.Finishing. Without adding extra mortar, float the top of the curb to thoroughly compact the concrete and produce a smooth and even surface. Round the edges of the curb using a tool specially designe d for this purpose. Immediately after removing the forms, rub the exposed face of the curb with a float to eliminate unnecessary tool marks. Provide a finished surface free of irregularities and waves, and uniform in texture.
E.Protection. Cure concrete a ccording to 451.11
609.05 Asphalt Concrete Curb. Use one of the following methods, or other
method approved by the Engineer, to furnish and place an asphalt concrete curb of the required cross -section.
A.Method A. After completing the surface course, paint or spray only the area to be occupied by the asphalt concrete curb with asphalt material conforming to
407.02 Apply the asphalt material at the rate of 0.15 gallon per square yard (0.7
L/m2). Place the curb with a hand -operated or self -propelled ma chine consisting of a hopper and power -driven screw, which forces the material through an extrusion tube. Force the material through a die attached to the end of the extrusion tube to obtain the proper density and cross -section. 609.06 491 B. Method B. As an independ ent operation preceding the final rolling of the asphalt concrete surface course on which the curb is placed, place loose asphalt concrete of sufficient height. Shape the loose asphalt concrete by hand methods using suitable templates or by other means to produce the specified cross -section. Compact the loose asphalt concrete using a hand -operated mechanical vibrating tamper equipped with a compacting shoe of such shape that will produce the specified final cross -section dimensions of the curb.
609.06 Concr ete Median and Traffic Island
A.Forms and Joints. Securely brace and hold approved steel forms to the line and grade shown on the plans. The Contractor may use approved flexible forms of steel or wood to construct curves with a radius of 200 feet (60 m) o r less. Immediately before placing concrete, clean the inner surface of the forms, and coat this surface with a form release agent. Where medians and traffic islands are not anchored to the pavement, construct contraction joints at 10 -foot (3 m) intervals using steel separator plates, a grooving tool, or saw according to Item 451. Construct joints to a minimum depth of 2 inches (50 mm). Where the medians or traffic islands are anchored to the pavement, construct the same type of joints in the median or traf fic island as used in the pavement. Construct joints to a minimum depth of 2 inches (50 mm) using steel separator plates, a grooving tool, or saw according to Item 451. Space the joints identically with the joints in the pavement. Leave forms in place unti l their removal will not crack, shatter, or otherwise injure the concrete.
B.Placing. Immediately before placing a concrete median or traffic island on subgrade, bring the subgrade to a thoroughly moistened condition by sprinkling with water at such times and in such a manner directed by the Engineer. Follow 511.12 for concrete placement during cold weather conditions. Place the concrete in forms prepared as described above, and vibrate the concrete to eliminate all voids.
C.Slip-Form Placement. The Contractor may use a self -propelled machine to place medians and traffic islands. Force the concrete through a mold of the proper cross -section to obtain the proper density and cross -section. If using a track, set and secure the track on which the mac hine operates to the exact line and grade given by the Engineer. Use concrete of a consistency that provides the desired shape and remains as placed without slumping of the faces.
D.Finishing. Without adding extra mortar, finish the top of the median or traffic island to a broom texture. Round the edges using a tool specially designed for this purpose. Immediately after removing the forms, rub the exposed faces with a float to eliminate unnecessary tool marks. Provide a finished surface free of irregulari ties and waves, and a uniform texture.
E.Curing and Treating. Cure concrete according to Item 451 .11. After the minimum curing period and a 30 day drying time apply an approved non -epoxy sealer (705.23 .B) according to Item 512. Ensure any remaining curing compounds 609.07 492 that are incompatible with the selected sealer and all foreign materials are removed prior to sealer treatment.
609.07 Method of Measurement. The Department will measure Sandstone
Curb, Curb, Combination Curb and Gutter, and Asphalt Concrete Curb by the number of feet (meters) complete in place, measured along the front face of the curb section. The Department will measure Concrete Traffic Island and Concrete Median by the number of square yard s (square meters) or the number of cubic yards (cubic meters) complete in place.
609.08 Basis of Payment. The Department will pay for accepted quantities at
the contract prices as follows: Item Unit Description 609 Foot (Meter) Sandstone Curb 609 Foot (Met er) Curb, Type ___ 609 Foot (Meter) Combination Curb and Gutter, Type ___ 609 Foot (Meter) Asphalt Concrete Curb, Type ___ 609 Square Yard or Concrete Traffic Island Cubic Yard (Square Meter or Cubic Meter) 609 Square Yard or Concrete Median Cubic Yard (Square Meter or Cubic Meter) ITEM 610 CELLULAR RETAINING W ALLS
610.01 Description
610.02 Approval by the Department
610.03 Materials
610.04 Manufactured Units
610.05 Excavation
610.06 Backfill
610.07 Wall Construction
610.08 Method of Me asurement
610.09 Basis of Payment
610.01 Description. This work consists of constructing retaining walls
composed of a series of cells formed by assembling precast reinforced concrete or galvanized metal units to form stable walls. Concrete cellular walls consist of a series of rectangular or triangular cells formed by building up tiers of precast reinforced concrete units. Metal cellular retaining walls consists of pairs of columns, one column in the plane of the front of the wall and the other column in the plane of the rear of the 610.02 493 wall. The column pairs are spaced longitudinally with overlapping S -shaped facing and rear members, and transversely with overlapping U -shaped members.
610.02 Approval by the Department . Submit to the Departmen t for
acceptance, 30 days before the work is to begin, shop drawings of the units to be furnished . Only submit information for walls produced by manufacturers whose type of wall, and design of units comprising same, has been in successful commercial use for a period of at least 3 years.
610.03 Materials. Furnish manufactured units conforming to:
A.Concrete Cellular Wall. Use concrete conforming to Item 499, Class QC 1. Use reinforcing steel conforming to 509.02.
B.Metal Cellular Wall. Provide units made f rom galvanized metal sheets. Use base metal conforming to AASHTO M 218. Ensure that both sides of the sheets are galvanized by the hot -dip process. Provide an average spelter coating of not less than 2 ounces per square foot (610 g/m2) on each side of the sheet and a spelter coating of at least 1.8 ounces per square foot (550 g/m2) on any 2 1/4 2 1/2 -inch (57 64 mm) area on each side of double exposed surfaces. Provide finished sheets that are free from injurious defects, such as blisters, flux, and unc oated spots. Use metal sheets with a minimum thickness of 0.057 inch (1.45 mm), unless otherwise shown on the plans. Furnish three copies of the manufacturer’s “Analysis and Coating Test Certificate” containing the following information covering each proje ct or order on which galvanized metal walls are furnished :
A.Heat or heats used for units.
B.Analysis of each heat.
C.Amount of spelter coating for each heat.
D.Total units of each size and thickness.
E.Name of Contractor.
F.Name of County, Intersta te, U.S., or State route number, and section.
G.Project number or state purchase order number. Send one copy of the certificate to the Laboratory and two copies to the Engineer. With each copy of the certificate, include a written statement, signed by a p erson having legal authority to bind the manufacturer, that the information and test results are correct and that the material complies with all contract requirements. Furnish 5/8 inch (16 mm) diameter bolts, galvanized according to 711.02 and at least 1 1/4 inches (32 mm) long, measured from the underside of the bolt head.
610.04 Manufactured Units.
A.Concrete Cellular Wall. Cast concrete cellular wall units in substantial, unyielding steel forms. Properly assemble, clean, and oil the forms before placin g concrete in the forms. During the placing and setting of the concrete, hold the forms rigidly in place on a smooth and level platform. 610.05 494 Secure the reinforcement to ensure that it remains in the required position while placing concrete. Vibrate the fresh c oncrete to fill all space in the form with concrete, to densify the concrete, and to surround the reinforcement. Reject units with segregated areas. Cure the units by covering with burlap, that is kept wet at least 7 days or by applying steam for at least 24 hours. All openings to be filled with nonshrink mortar per 705.22 including all lifting device voids . The Engineer will reject reinforced concrete units for any of the following reasons:
1.Exposure of the reinforcing.
2.Defects that indicate imperfect mixing, placing, or curing.
3.Fractures and cracks.
B.Metal Cellular Wall. Fabricate galvanized metal cellular wall units so that units of the same nominal size are fully interchangeable. Do not drill, punch, or drift holes to correct manufacturing defe cts. Replace all units with improperly punched holes. If possible, maintain a minimum forming radius of 1 inch (25 mm). Hot-dip galvanize all units formed with less than 1 inch (25 mm) radius after forming.
610.05 Excavation. Excavate according to Item 203. Obtain the Engineer’s
approval that the bearing for the foundation of the walls is firm and to the proper elevation before erecting the wall.
610.06 Backfill. Below the elevation of the proposed ground line at the face of
the wall, fill the cells form ed by the units with soil as defined in 203.02.R. Above the elevation of the proposed ground line at the face of the wall, fill the cells with material conforming to 203 Granular Material Type B, except that the percent passing the No. 200 (75 m) sieve sh all not exceed 5 percent. Place the material in layers that compact to a depth not to exceed 6 inches (150 mm). Compact the material to the density established by the Engineer using approved tampers or compactors. Add water as directed by the Engineer. Fill the space behind the wall according to 503.08, except as noted below. Backfill around the wall and in the interior cells, concurrent with wall erection and as close to the wall elevation as allowed by the type of construction. Do not use rolling equipmen t directly over a portion of the wall until placing at least 12 inches (0.3 m) of compacted fill.
610.07 Wall Construction. Construct the wall types as follows:
A.Concrete Cellular Wall. Place sills to the required grade and alignment, and support the ent ire sill length on the foundation material. Do not shim the sill. Place and interlock the headers perpendicular to the sills and stretches. Use templates to ensure that members are placed in the proper position and with the proper face batter. 610.08 495 Before placi ng sills, spread two layers of asphalt impregnated paper on all points of contact between the sills and the foundation material to ensure a uniform bedding. After constructing two tiers of the wall, check and, if necessary, adjust the alignment, grade, and batter of the units, and backfill to this height before adding subsequent units. Complete the remainder of the wall.
B.Metal Cellular Wall. Use templates to ensure that members are placed in the proper position and with the proper face batter. After plac ing the columns and constructing two tiers of the wall, check and, if necessary, adjust the alignment, grade, and batter of the units, and backfill to this height before adding subsequent units. Complete the remainder of the wall. Carefully handle members, and remove and replace damaged members.
610.08 Method of Measurement. The Department will measure Cellular
Retaining Wall by the number of square feet (square meters) of facial area complete in place.
610.09 Basis of Payment. Payment is full compensation for furnishing all
materials, backfilling, including the interior filling, watering, and disposing of surplus materials. The Department will not pay for replacing any unit with improperly punched holes. The Department will not pay for removing or replacing members damaged during handling. The Department will pay for Excavation Not Including Embankment Construction under Item 203. The Department will pay for accepted quantities at the contract price as follows: Item Unit Description 610 Square Foot Cellular Retaining Wall (Square Meter) ITEM 611 PIPE CULVERTS, SEWER S, DRAINS, AND DRAINAGE STRUCTU RES
611.01 Description
611.02 Materials
611.03 Definitions
611.04 Submittals
611.05 Excavation
611.06 Bedding and Backfill
611.07 Laying Conduit
611.08 Joining Conduit
611.09 Exterior Coatings and Membrane Waterproofing 611.01
496 611.10 Drainage Structure Construction
611.11 Field Paving of New or Existing Conduit
611.12 Performance Inspection
611.13 Conduit Evaluation
611.14 Drainage Structure Evaluation
611.15 Surface Se ttlements
611.16 Method of Measurement
611.17 Basis of Payment
611.01 Description. This work consists of constructing conduits, and
constructing and reconstructing drainage structures. This work also includes preparing installation plans, performing inspe ctions, and providing reports and other required documentation.
611.02 Materials. Furnish pipe of the specified conduit type and size or one size
larger with the approval of the Engineer. Conduit shown in the plans is designed for hydraulic capacity and du rability only. Furnish conduit that meets the performance requirements of this specification and meets the durability and hydraulic capacity specified in the plans. If the material is not specified in the plans, furnish conduit conforming to any of the mat erial requirements listed for that conduit type. All listed materials for each conduit type can meet the performance requirements. However, different materials may require varying installation procedures. The Contractor may furnish concrete or plastic pip e of the same type with greater strength than specified. The Contractor may furnish metal pipe with a greater thickness than specified, so long as the pipe has the same corrugation profile and is the same type.
A.Type A Conduit – Culverts Non-reinforced concrete pipe, Class 3 .................. 706.01 Reinforced concrete circular pipe ........................... 706.02 Reinforced concrete pipe, epoxy coated ................ 706.03 Reinforced concrete elliptical pipe ......................... 706.04 Precast reinforced concrete box sections ................ 706.05 Precast reinforced concrete 3 -sided flat topped culverts ................................ ................ 706.051 Precast reinforced concrete arch sections ............ 706.052 Precast reinforced concrete round sections ........... 706.053 Vitrified clay pipe (extra strength only) ................. 706.08 Corrugated steel conduits ....................... 707.01 or 707.02 Structural plate corrugated steel structu res ............. 707.03 Precoated, galvanized steel culverts ....................... 707.04 Bituminous coated corrugated steel pipe and pipe arches with paved invert ...... 707.05 Type B or 707.07 Type B Corrugated steel box culverts ................................ . 707.15 Polymer Precoated, Galvanized Steel Conduits with precoated galvanized smooth interior liner. ................................ ..................... .707.18 Aluminum coated Steel Conduits with precoated galvani zed smooth steel interior liner ................................ ....................... 707.19 611.02 497 Galvanized Coated Steel Conduits with precoated galvanized smooth steel interior liner ................................ ................... …707.20 Corrugated aluminum alloy pipe ............. 707.21 or 707.22 Aluminum alloy structural plate conduits ............... 707.23 Corrugated aluminum box culverts ......................... 707.25 Corrugated polyethylene smooth lined pipe ............ 707.33 Polyethylene Plastic Pipe Based on Outside Diameter (OD) ................................ ................................ .. 707.34 Polyethylene Profile Wall Pipe ............................... 707.35 Polypropylene Corrugated Double Wall Pipe ......... 707.65 Polypropylene Corrugated Triple Wall Pipe ........... 707.69 Glass -fiber -reinforced polymer mortar pip e ........... 707.75 Steel reinforced thermoplastic ribbed pipe ............. SS 938
B.Type B Conduit – Storm or sanitary sewers under pavement Non-reinforced concrete pipe, Class 3 .................... 706.01 Reinforced concrete circular pipe ........................... 706.02 Reinforced concrete elliptical pipe ......................... 706.04 Precast reinforced concrete box sections ................ 706.05 Vitrified clay pipe (extra strength only) .................. 706.08 Corrugated steel spiral rib pipe ............................... 707.12 Bituminous lined corrugated steel pipe ... 707.13 or 707.14 Polymer Precoated, Ga lvanized Steel Conduits with precoated galvanized smooth interior liner. ................................ ..................... .707.18 Aluminum coated Steel Conduits with precoated galvani zed smooth steel interior liner ................................ ....................... 707.19 Galvanized Coated Steel Conduits with precoated galvanized smooth steel interior liner ................................ ................... …707.20 Corrugated aluminum spiral rib pipe ...................... 707.24 Corrugated polyethylene smooth lined pipe ............ 707.33 Polyethylene Plastic Pipe Based on Outside Diameter (OD) ................................ ................................ .. 707.34 Polyethylene Profile Wall Pipe .............................. 707.35 Polyvinyl chloride corrugated smoo th interior pipe 707.42 Polyvinyl chloride profile wall pipe ........................ 707.43 Polyvinyl chloride solid wall pipe .......................... 707.45 Polyvinyl chloride drain waste and vent pipe ......... 707.46 Polyvinyl chloride ABS composite pipe ................. 707.47 Polyvinyl chloride large -diameter solid wall pipe .. 707.48 ABS drain waste and vent pipe ............................... 707.51 Polypropylene corrugated double wall pipe ............ 707.65 Polypropylene triple wall pipe ................................ 707.69 Glass -fiber -reinforced polymer mortar pipe ........... 707.75 Steel reinforced thermoplastic ribbed pipe ............. SS 938 Ductile iron pipe (sanitary) ................................ ..... 748.01 Polyvinyl chloride pipe (sanitary) ........................... 748.02 611.02
C.Type C Conduit – Storm or sanitary sewers not under pavement Non-reinforced concrete circular pipe .................... 706.01 Reinforced concrete pipe ................................ ........ 706.02 Reinforced concrete elliptical pipe ......................... 706.04 Precast reinforced concrete box sections ................ 706.05 Vitrified clay pipe ................................ .................. 706.08 Corrugated steel spiral rib pipe ............................... 707.12 Bituminous lined corrugated steel pipe .. 707.13 or 707.14 Polymer Precoated, Galvanized Steel Conduits with precoated galvanized smooth interior liner. ................................ ..................... .707.18 Aluminum coated Steel Conduits with precoated galvani zed smooth steel interior liner ................................ ....................... 707.19 Galvanized Coated Steel Conduits with precoated galv anized smooth steel interior liner ................................ ................... …707.20 Corrugated aluminum spiral rib pipe ...................... 707.24 Corrugated polyethylene smooth lined pipe ........... 707.33 Polyethylene Plastic Pipe Based on Outside Diameter (OD) ................................ ................................ . 707.34 Polyethylene Profile Wall Pipe .............................. 707.35 Polyvinyl chlo ride corrugated smooth interior pipe 707.42 Polyvinyl chloride profile wall pipe ....................... 707.43 Polyvinyl chloride solid wall pipe .......................... 707.45 Polyvinyl chloride drain waste and vent pipe ......... 707.46 Polyvinyl chloride ABS composite pipe ................ 707.47 Polyvinyl chloride large -diameter solid wall pipe .. 707.48 ABS drain waste and vent pipe .............................. 707.51 Polypropylene corrugated double wall pipe ........... 707.65 Polypropylene triple wall pipe ................................ 707.69 Glass -fiber -reinforced polymer mortar pipe ........... 707.75 Steel reinforced thermoplastic ribbed pipe ............. SS 938 Ductile iron pipe (sanitary) ................................ ..... 748.01 Polyvinyl chloride pipe (sanitary) .......................... 748.02
D.Type D Conduit – Drive pipes and bikeways Non-reinforced concrete pipe, Class 3 ................... 706.01 Reinforced concrete circular pipe ........................... 706.02 Reinforced concrete ellipt ical pipe ......................... 706.04 Vitrified clay pipe (extra strength only) ................. 706.08 Corrugated steel conduits ....................... 707.01 or 707.02 Structural plate corrugated steel structures ............. 707.03 Corrugated aluminum alloy pipe ............ 707.21 or 707.22 Aluminum alloy structural plate conduits ............... 707.23 Corrugated polyethylene smooth lined pipe ........... 707.33 Polyvinyl chloride corrugated smooth interior pipe 707.42 Polyvinyl chloride profile wall pipe ....................... 707.43 Polyvinyl chloride solid wall pipe .......................... 707.45 611.02 499 Polyvinyl chloride large -diameter solid wall pipe .. 707.48 Polypropylene corrugated single wall pipe ............. 707.62
E.Type E Conduit – Miscellaneous small drain connections and headers Non-reinforced concrete pipe ................................ . 706.01 Reinforced concrete circular pipe ........................... 706.02 Reinforced concrete elliptical pipe ......................... 706.04 Concrete drain tile, extra quality ............................. 706.07 Vitrified clay pipe ................................ ................... 706.08 Clay drain title, extra quality ................................ .. 706.09 Corrugated steel conduit ......................... 707.01 or 707.02 Corrugated aluminum alloy pipe ............. 707.21 or 707.22 Corrugated polyethylene drainage pipe .................. 707.32 Corrugated polyethylene smooth li ned pipe ............ 707.33 Smooth -wall polyvinyl chloride underdrain pipe (non-perforated) ................................ ................. 707.41 Polyvinyl chloride corrugated smooth interior pipe 707.42 Polyvinyl chloride profile wall pipe ........................ 707.43 Polyvinyl chloride solid wall pipe .......................... 707.45 Polyvinyl chloride drain waste and vent pipe ......... 707.46 Polyvinyl chloride ABS composite pipe ................. 707.47 Polyvinyl chloride large -diameter solid wall pipe .. 707.48 ABS drain waste and vent pipe ............................... 707.51
F.Type F Conduit – Conduit on steep slopes; underdrain outlets Corrugated steel conduits (steep slope conduit) ............. 707.05 Type C or 707.07 Corrugated aluminum alloy pipe (steep slope conduit) .......................... 707.21 or 707.22 Corrugated polyethylene smooth lined pipe (underdrain outlets) ............... 707.33 Smooth -wall polyvinyl chloride underdrain pipe (non-perforated underdrain outlets) .................... 707.41 Polyvinyl chloride corrugated smooth interior pipe (underdrain outlets) ........... 707.42 Polyvinyl chloride solid wall pipe (underdrain outlets) ................................ ............ 707.45
G.For constructing or reconstructing drainage structures, furnish materials conforming to: Concrete, Class QC1. ................................ ........... 511, 499 Brick and masonry units ................................ .............. 704 Precast reinforced concrete manhole, catch basin, and inlet sections ................................ ................ 706.13 Precast reinforced concrete outlet ........................... 706.15 Preformed expansion joint filler ............................. 705.03 Epoxy coated reinforcing steel ................................ 709.00 Cast frames, grates, and covers . 711.12, 711.13, or 711.14 Welded frames and grates .................... 711.01 and 513.17 Steps ................................ ......... 711.13, 711.30, or 711.31 611.02 500 Resilient and flexible gasket joints ......................... 706.11 Curing materials ................................ ......... 705.05, 705.07 Curing membrane for inlets ............ 705.07, Type 1 or 1 -D Mortar ................................ ................................ ......... 602 Nonshrink mortar… ................................ ....………705.22
H.For bedding and backfill, furnish materials conforming to: Bedding ................................ .......................... 613, 703.11 Structural Backfill ................................ ......... 613, 703.11 Final Backfill: Granular Structural Backfill ............................. 703.11 Natural Soi ls ................................ ............. 703.16.A[1] Granular Embankment Materials ................ 703.16.B[1] Granular Embankment Material Types A, B, C and D ................................ . 703.16.C[1] Coarse aggregate ................................ .. Table 703.01 -1 Fine aggregate ................ 03.02.A, 703.03, or 703.05.A 304 ................................ ................................ ..703.17.A 410, 411, and 617 ................................ ....... 703.18.A[1] Low Strength Mortar Backfill (LSM) ..................... 613 [1] Use any type of material defined as suitable materials for embankment construction except for steel slag , PCS and RAP .
I.For concrete collars and encasement, furnish materials conforming to: Concrete, Class QC 1 ................................ .......... 511, 499 Reinforcing steel ................................ ................... 509.02
J.For field paving of conduit inverts, furnish materials conforming to: Concrete, Class QC 5, QC Misc .......................... 511, 499 Coarse aggregate, size No. 7, 8, or 78 .................... 703.02 Galvanized welded wire fabric ............................... 709.08 For ma terial in items not specified above, furnish materials conforming to: Mortar ................................ ................................ ......... 602 Nonshrink mortar ................................ ................... 705.22 Concrete Sealers ................................ ..................... 705.23 Bituminous pipe joint filler ................................ .... 706.10 Resilient and flexible gasket joints for: Concrete pipe ................................ ..................... 706.11 Vitrified clay pipe ................................ .............. 706.12 Preformed flexible joint sealant .............................. 706.14 Type 2 membrane waterproofing ........................... 711.25 Type 3 membrane waterproofing ........................... 711.29 Geotextile Fabric ................................ ...... 712.09, Type A Joint wrap ................................ ...... ASTM C 877, Type III Buried liner waterproofing membrane ................... 711.22 For Class QC1 concrete, provide batch plant tickets according to 499.07. 611.03 501 If a precast reinforced concrete box culvert (706.05) is specified, the Engineer may allow the Contractor to substitute either a precast reinforced concrete 3 -sided flat topped culvert, a precast reinforced concret e arch culvert, or a precast reinforced concrete round section (706.051, 706.052, or 706.053). If a 706.051, 706.052, or 706.053 is specified, the Engineer may allow the Contractor to substitute one for the other. Refer to 611.04 for submittal requirements . If bituminous coated corrugated steel pipe or pipe arch with paved invert (707.05 or 707.07) is specified, the Contractor may furnish conduit with a coating conforming to 707.04.
611.03 Definitions . The following terms, when used in this specification, a re
defined as follows: Backfill . Material used to fill the trench or excavation, further defined as Structural Backfill and Final Backfill, not including the bedding material. Bed. The bottom of the trench or excavation. Bedding Material . Material placed above the bed and below the conduit or drainage structure. Conduit . Includes pipe, culverts, sewers, and drains. Conduits are classified as Type A, B C, D, E, and F. Conduit Rise. The distance of the greatest vertical opening of the conduit. For round conduits, the conduit rise equals the conduit diameter. Corrugated Metal Conduit . Includes all conduit made from corrugated steel or corrugated aluminum. Either material may also have coatings. This includes all of the following types of materials: 707.01, 707.02, 707.03, 707.04, 707.05, 707.07, 707.12, 707.13, 707.14, 707.15, 707.17, 707.21, 707.22, 707.23, 707.24, and 707.25. Cut. A situation where the top of the conduit is below the existing ground surface or where a proposed embankment is constructed at least 2 feet (0.6 m) above the top of the condu it before installation. Deflection. Uniform or symmetrical flattening or ovalization of the pipe’s cross - section. Design Service Life. The average usable life of a conduit or structure. Drainage Structures . Manholes, catch basins, inlets, inspection wells, junction chambers, and precast reinforced concrete outlets. Fill. A situation where the top of the conduit is above the existing ground surface in an area where an embankment will be constructed. Final Backfill. Material used to fill the trench or excavat ion above the Structural Backfill. Flexible Conduit . Plastic, corrugated metal, ductile iron (748.01), or steel casing pipe (748.06). Infiltration . Water or other material that enters the conduit or drainage structure through the joints or conduit connecti ons in excess of the limits for soil tightness or for the type of joint specified. 611.04 502 Lay Length . The length of a standard section of pipe as normally supplied by the manufacturer. Plastic Conduit . Corrugated polyethylene, polyvinyl chloride, or ABS conduit. This includes all of the following types of materials: 707. 32, 707.33, 707.41, 707.42, 707.43, 707.44, 707.45, 707.46, 707.47, 707.51 , 707.62, 707.65, 707.69, SS 938, and 748.02. Racking. Non-symmetrical deflection or ovalization of a pipe’s cross -section. Rigid Conduit . Concrete pipe, vitrified clay pipe, or clay drain tile. This includes all of the following types of materials: 706.01, 706.02, 706.03, 706.04, 706.05, 706.051, 706.052, 706.053, 706.08, and 706.09. Run of Conduit . The c onduit placed between drainage structures, between a drainage structure and an open outlet, between an open inlet and a drainage structure, or between the open inlet and open outlet. Span. Span is the conduit opening measured along the centerline of the ro adway. Multiple cell openings are considered one span if the clear distance between the openings is less than half of the smaller contiguous opening. Spring Line . A line along the length of the pipe at its maximum span. For circular pipes the spring line is located at mid -height of the pipe (rise divided by two). Structural Backfill . Material adjacent to the conduit used to fill the trench from the top of Bedding Material to 12 -inches above the top of conduit or greater as required by the manufacturer. For drainage structures, material used to fill the trench from the top of Bedding Material to subgrade in pavement or topsoil in vegetated areas .
611.04 Submittals
A.Shop Drawings. Prepare shop drawings and calculations for C&MS items 706.051, 706.052, 706.0 53, and “Special Design” 706.02 as required below. Have competent individuals prepare and check the shop drawings and hydraulic calculations. Provide a cover sheet containing the preparer(s) and checker(s): First Name, Last Name, Initials and Conten t Responsibility. Preparer(s) and checker(s) shall initial each sheet for their content responsibility. The preparer(s) and checker(s) shall not be the same individual. Have an Ohio Registered Engineer review, approve, sign, seal and date the shop drawing cover sheet or submittal letter and hydraulic calculations according to ORC 4733 and OAC 4733 -35. Submit load rating report in accordance to the most current version of ODOT’s Bridge Design Manual along with one copy of the shop drawings and one copy of th e calculations to the Office of Structural Engineering for all structures with a 10 foot or larger span. Submit an additional copy of the shop drawings and calculations to the Engineer.
1.If Reinforced Concrete Circular Pipe, 706.02, requires a “Special Design” with a specified D -load requirement other than Tables 706.02 -1 through
706.02 4, submit shop drawings and design calculations. Design the pipe to meet
the D -load requirements to ensure the performance of this specification. Include the following in formation in the submittal: all structural design and loading information, all material specifications, all dimensions, and the installation plan. 611.04 503 2. Submittals for Precast reinforced concrete 3 -sided flat topped culverts, precast reinforced concrete arch sections, or precast reinforced concrete round sections, (706.051, 706.052, or 706.053) shall include structural analysis methods, structural design criteria and calculations, structure details, and shop drawings. Include details for a precast slab bottom if required.
3.To substitute a precast reinforced concrete 3 -sided flat topped culvert (706.051), a reinforced concrete arch section (706.052), or a precast reinforced concrete round section (706.053) for one another, the submittal shall include hydraul ic calculations. The proposed culvert shall meet or exceed the same hydraulic requirements as the specified culvert and minimum cover requirements. If the specified culvert is on pedestal walls, include the shop drawings for the pedestal wall design in the submittal because 3 -sided flat topped culverts, arch culverts, and round sections require different pedestal wall designs.
4.To substitute either a precast reinforced concrete 3 -sided flat topped culvert, a precast reinforced concrete arch section, or a precast reinforced concrete round section (706.051, 706.052, or 706.053) placed on a precast or cast -in-place slab bottom for a precast reinforced concrete box culvert (706.05), the submittal shall include hydraulic calculations. The proposed culvert shal l meet or exceed the same hydraulic requirements as the specified box culvert and minimum cover requirements. The Department may allow the bottom slab to be cast -in-place but will not issue a time extension for any delays resulting from the use of a cast -in- place bottom slab. Department approval of shop drawings and calculations is not required.
B.Installation Plan. Submit a written installation plan to the Engineer for installing all conduit and drainage structures for review and acceptance. Submit the i nstallation plan at least 15 days before any conduit or drainage structure work begins. Do not perform work without an accepted installation plan. Include the following required information for each conduit run:
1.Trench and excavation cross -sections wi th dimensions.
2.Completed CA -P-1A Conduit Installation Plan Form.
3.Other installation details as necessary.
4.Provide written confirmation from the conduit manufacturer that the pipe material and strength supplied are appropriate for the material and density requirements described in the installation plan for the backfill and bedding as well as the height of cover. Ensure the pipe material meets the durability design specified in the plans. This confirmation by the conduit manufacturer will not reliev e the Contractor of the responsibility for obtaining the required results. Include the following required information for each drainage structure:
1.Trench and excavation cross -sections with dimensions.
2.Completed CA -P-3A Drainage Structure Installation Plan Form 611.04 504 3. Other installation details as necessary. Deviations from the installation plan during construction require a revision of the installation plan. Resubmit all revisions to the installation plan to the Engineer within 14 days of the change with the conduit manufacturer’s written confirmation that the conduit material and strength supplied are appropriate for the material and density requirements described in the newly revised installation plan for the backfill and bedding. If the conduit manufac turer does not provide this written confirmation to the newly revised installation plan, all the conduit installed according to the unconfirmed plan must be replaced. No new installation plans will be considered until all previous installation plans have b een confirmed and accepted. Provide the conduit manufacturer's structural calculations when specified or within 10 days when requested by the Engineer. Ensure the conduit structural design is performed in accordance to AASHTO LRFD Bridge Design Specificati ons. Have an Ohio Registered Engineer sign and seal the calculations. For structural plate and metal pipe arch conduit with a span of 57 inches (1440 mm) or larger, ensure the manufacturer provides match -marked ends on the conduit. Include a layout drawi ng in the installation plan. For metal conduit with two structural plate thicknesses specified, identify the location of the thicker plates. For precast concrete 3 -sided flat and arch topped structures (706.051 and 706.052) provide a 3 inch (75 mm) deep ke yway centered on the leg and at least 6 inches (150 mm) wider than the thickness of the leg at the bottom. For precast concrete round sections (706.053) provide an 8 inch (200 mm) deep keyway for spans up to 24 feet (7.3 m) and a 10 inch (254 mm) deep ke yway for spans greater than 24 feet, (7.3 m). Center the keyway on the precast arch base. The width of the keyway must be 8 inches (200 mm) greater than the thickness of the precast arch base. For non -vertical leg arches set on pedestal walls, a one sided keyway is acceptable if the required pedestal wall design thickness is not sufficient for a full keyway.
C.Construction Inspection Forms . Perform work so that it can be verified by the Contractor’s representative doing the inspection. Submit construction inspection forms to the Engineer for each run of conduit and each drainage structure. Use construction inspection form CA -P-1 for conduit and use construction inspection form CA -P-3 for drainage structures. Inspection form CA -P-3 is not required for precast reinforced concrete outlet structures 706.15. Ensure that all deviations from the installation plan are noted on the construction inspection form. Ensure that the information on the construction inspection form is complete and accurate and that the form is signed by a representative of the Contractor certifying that the information on the form is accurate. The Contractor’s representative must make the following statement on the form: “I certify that the information on this form is accurate and all d eviations from the current installation plan have been noted.” Submit each day’s construction inspection forms before the start of the next work day. If the Engineer gives notice that the information on the form is incomplete or not accurate, do not continue related work until complete and accurate forms are submitted and accepted by the Engineer. 611.05 505 Construction inspection forms CA -P-1 and CA -P-3 require trench and bedding measurement checks to be taken every 50 feet with a minimum of two per run. Recor d measurements to the nearest 0.1 foot (30 mm). If these measurements are not taken, do not continue related work until the Contractor submits a plan in writing to the Engineer for approval that explains how these measurements will be determined.
D.Perfor mance Report . Provide a performance report for each performance inspection. Include the following in each performance report:
1.Project number and County -Route -Section.
2.Date of performance inspection.
3.Type and size of conduit.
4.Time of video r ecording.
5.Location (e.g. station and offset) and viewing direction.
6.Summary of all defects including type, measurement, and location.
7.For remote inspections using a mandrel, indicate in the performance report, the size of the mandrel and how i t was calculated. Document all locations where the mandrel was unable to advance through the conduit.
8.For remote inspections using a crawler mounted camera with laser profiler, include:
a.Three dimensional model of the conduit based on the laser profi le measurements.
b.Digital profile of conduit extracted from the inspection video.
c.Calculations of the ovality, capacity and delta of the conduit
d.Explanation as to why data was unattainable for any section of the conduit.
9.Conduit Evaluation Subm it a performance report to the Engineer within 14 days of completing the performance inspection of the conduit run or drainage structure. Submit the performance report in a digital format that allows the Department to make additional copies.
611.05 Excava tion. Excavate as described in the installation plan. Record any
deviations from the installation plan on the construction inspection forms and revise the installation plan. Excavate trenches along the centerline of the conduit. When installing conduit in a fill situation, construct the embankment to the elevation of the spring line for the conduit or higher before excavating the trench. Remove any unsuitable material exposed in the bed for the width of the trench and a depth of at least 6 inches (150 mm) . Replace the unsuitable material with structural backfill, Type 1 or 2. Remove any rock or shale exposed in the bed to a depth of at least 6 inches (150 mm). Replace the rock or shale with structural 611.06 506 backfill, Type 1 or 2. The Department will pay for this work according to 109.05, unless otherwise noted in the Contract Documents. If the Engineer changes the flow line by more than one foot (0.3 m), the Department will pay according to 109.05, unless otherwise noted in the Contract Documents.
611.06 Bedding and Backfill. Place and compact bedding and backfill as
described in the installation plan. Record any deviations from the installation plan on the construction inspection forms and revise the installation plan. Place geotextile fabric , Type A above coarse aggregate backfill for the full width of the trench. For installations where groundwater is probable, w rap coarse aggregate bedding and backfill with geotextile fabric to the elevation or above the elevation of the the groundwater . Shape the bedding with recesses to receive the bell of bell -and-spigot conduit. Loosen the bedding in the middle third to seat the conduit. If using LSM for bedding, also use LSM for backfill to at least 6 inches (150 mm) over the top of the conduit. Install bedding and backfill for Type F conduits for underdrain outlets according to 605.03.C. Conduit Manufactures may approve materials listed in 611.02 for Final Backfill for u se as Bedding and Structural Backfill for Type F conduits on slopes 3:1 or greater. Conduit Manufacturers may approve materials listed in 611.02 for Final Backfill for use as Structural Backfill for conduit Types D and E and drainage structures not locate d in pavement. Identify the use of Final Backfill materials proposed for Bedding and Structural Backfill in the Installation Plan and cross -section details. Ensure compaction density complies with the installation plan by performing compaction testing acc ording to Supplement 1015 and the manufacturer’s recommendation. Final Backfill shall meet or exceed the requirements of 203. If Structural Backfill Type 3 or open graded material is used, vibrate, tamp or compact to the compaction level required by the ma nufacturer in the installation plan.
611.07 Laying Conduit . Maintain flows and drainage at all times until the new
facilities are completed and in service. Any planned temporary diversion of flows and drainage is the responsibility of the Contractor. Maint ain temporary diversion at no additional cost to the Department. Visually inspect all conduit before it is placed in the trench. Replace all conduit that is damaged as determined by the Engineer. Before installation, measure and record on the CA -P-1 the wi dest inside dimension of each lay length of conduit. This measurement is to be taken three times along each run of conduit. For corrugated metal conduit measure to the inside peak of the corrugations. Lay the conduit in the center of the trench at the inve rt elevation shown on the plans. Any deviation must be approved by the Engineer. If the Engineer does not approve the deviation, stop all related work until the conduit is relaid. Ensure that the conduit is in contact with the bedding for its full length a nd maintain the line and grade of the conduit. The Contractor’s representative doing the inspection will visually inspect all conduit before placing any backfill. Rejoin, re -lay, or replace conduits that have settled, or that are damaged. Lay all conduits as described in the installation plan and according to the following requirements. The installation plan cannot change the following requirements. Meeting these requirements does not relieve the Contractor of the 611.07 507 responsibility for obtaini ng the required results. Record any deviations from the installation plan on the construction inspection forms and revise the installation plan.
A.If the welded seam in a metal conduit is longitudinal, place the seam at the spring line.
B.For all metal c onduit, use only lifting devices that do not require a hole through the material.
C.Lay metal conduit so that match marks align.
D.For all metal conduit that is cut at a drainage structure or headwall, treat the cut end with the same coating as the conduit. Do not treat any cuts within the run.
E.Where two structural plate thicknesses are specified, place the thicker plates according to the installation plan.
F.Set precast reinforced concrete 3 -sided flat topped culvert sections (706.051) in the ke yway. Place the units in a 1/2 inch (13 mm) bed of mortar. If proper line and grade of the structure cannot be maintained on the bed of mortar, set the sections on 5 5 inch (125 125 mm) masonite or steel shims. Fill the entire keyway joint with morta r.
G.Set precast reinforced concrete arch sections (706.052) in the keyway. Place the units on 5 5 inch (125 125 mm) masonite or steel shims to provide a minimum 1/2 inch (13 mm) gap between the footing and the bottom of the leg. Fill the entire key way joint with mortar.
H.Set the precast reinforced concrete round sections (706.053) in the keyway. Place the units on masonite or steel shims to provide a minimum 1.5 inch (38 mm) gap between the footing and the bottom of the precast arch base. Fill th e entire keyway joint with mortar. Provide 5000 psi. (34.5 MPa) mortar. For arches that gain structural continuity by a cast -in-place closure at the project site, provide concrete with the same compressive strength as the precast arch.
I.For precast reinf orced concrete culverts (706.05, 706.051, 706.052, and 706.053) fill the lifting devices with mortar. Cover the exterior of the lifting devices with joint -wrap material if they are outside the limits of the membrane waterproofing. Use joint -wrap with a min imum width of 9 inches (225 mm). Use only lifting devices that do not require a hole through the structure.
J.The inlet of all rigid conduit used in a Type A application (open inlet) must have a bell. If field cutting is necessary to furnish a bell at the inlet, locate the cut end at an interior joint by removing part of a section within the run. Join the conduit as described below and encase the joint with a concrete collar to ensure a stable connection.
K.The top and bottom of reinforced concrete pipe t hat has elliptical or quadrant mat reinforcing will be clearly marked on the pipe. Handle and place this pipe so that the markings remain in a vertical plane through the center of the pipe.
L.Handle and place reinforced concrete pipe with auxiliary reinf orcements (stirrups) with the centerline of the auxiliary reinforcement system (stirrups) in a vertical plane through the center of the pipe. 611.08 508 M. Fill all lifting holes in rigid conduit with concrete according to the manufacturer’s recommendations or using a method approved by the Engineer.
N.Immediately after placing conduit, construct the end treatments at both the outlet and inlet ends. Show this activity as part of the conduit construction on the progress schedule. These end treatments include headwalls , concrete riprap, rock channel protection, sod or other erosion control items.
O.When conduit is installed under pavement, perform the following immediately after the completion of backfill placement and compaction: remove and dispose of all surplus mate rial according to 105.17, clear the site, and replace all pavement necessary to restore traffic. Show this activity as part of the conduit construction on the progress schedule.
P.Lay all conduit from outlet end to inlet unless approved by the Engineer.
611.08 Joining Conduit . Ensure the joints are clean and free from dirt or debris.
Join the conduit sections as described below. Visually inspect all conduit, joints, and gaskets before placing any backfill. Rejoin, re -lay, or replace any conduit that does not meet the requirements. The Engineer may allow joint materials other than those listed below, provided the Contractor demonstrates the proposed material will result in durable, sealed joints. Join conduit as described in the installation plan and accordi ng to the requirements below. Provide a concrete masonry collar per SCD D.M. -1.1 when joining conduits of different materials. For conduit material not listed below, join conduit as recommended by the manufacturer. Record any deviations from the installation plan on the construction inspection forms and revise the installation plan.
A.Corrugated Metal Conduit . Join corrugated me tal conduit, Types A, B, C, D, and F, using either coupling bands or bell and spigot joints. Join the conduit according to the following requirements.
1.Coupling bands. Furnish coupling bands conforming to 707.01 or 707.02, and having the same coating as the conduit being joined. Use either coupling bands with gaskets or wrap the joints with geotextile fabric , Type A .
2.Bell and spigot joints. If using bell and spigot joints, place a gasket in the first corrugation of the spigot end and thoroughly lubric ate the gasket and the bell end of the receiving conduit before assembly. Drive the spigot securely into the bell.
3.For coorugated metal conduits with smooth steel interior liner, furnish a joint conforming to 707.18, 707.19 and 707.20.
B.Rigid Conduit . Join rigid conduit, Types A, B, C, D, and F, according to the following requirements.
1.For all concrete pipe (706.01, 706.02, 706.04) that is not epoxy coated and vitrified clay pipe (706.08), seal the joints using one of the following methods:
a.Fill the joint with bituminous pipe joint filler, providing a smooth transition on the inside and a complete seal on the outside. 611.08 509 b. Use preformed flexible joint sealant to seal the joint. Before installing the joint sealant, prime both surfaces of the joint with asphalt based primer according to the joint sealant manufacturer’s recommendations.
c.Use resilient and flexible gasket joints. If the conduit is a sanitary sewer pipe, test the joint for infiltration and exfiltration according to ASTM C 969 or ASTM C 1103. If any joint does not meet the test requirements, make corrections until the joint meets the test requirements.
2.For epoxy coated concrete pipe (706.03), seal the joint using fibrated coal tar joint compound applied according to the conduit manu facturer’s recommendations.
3.For precast reinforced concrete box culverts, precast reinforced concrete 3-sided flat topped culverts, precast reinforced concrete arch sections, and precast reinforced concrete round sections (706.05, 706.051, 706.052, and 706.053), place the sections according to the installation plan. Clean the joint gap of all debris and apply one of the following:
a.For joints in precast reinforced concrete box culverts (706.05), fill the top exterior joint gap and the bottom and side i nterior joint gap with mortar. Next, for any exterior joint not covered by membrane waterproofing, cover the exterior joint with a 9 inch (225 mm) wide strip of joint wrap in accordance with the manufacturer’s recommendation. Center the joint wrap on the joint.
b.For precast reinforced concrete 3 -sided flat topped culverts (706.051), fill the top keyway joint with nonshrink mortar. If the side or leg joints are tongue and groove types, fill the joints as described above for concrete box culverts. If the side or leg joints are keyway types, fill with nonshrink mortar. Prepare, place, and cure the nonshrink mortar according to the nonshrink mortar manufacturer’s recommendations. Wet all surfaces of the keyway joint, but do not allow free standing water in t he joint. Next, cover the exterior joint with a 12 inch (300 mm) wide strip of joint wrap. Center the joint wrap on the joint. Use a continuous length of joint wrap sufficient to extend from the bottom of the vertical face on one side to the bottom vertic al face on the other side. Apply membrane waterproofing to the precast sections after they are installed.
c.For precast reinforced concrete arch sections and precast reinforced concrete round sections (706.052 and 706.053), install a 7/8 x 1 3/8 inch (24 x 34 mm) preformed flexible joint sealant (706.14) along the outside joint chamfer. Use a continuous length of joint sealant sufficient to extend from the bottom of the vertical face on one side to the bottom vertical face on the other side. Before instal ling the joint sealant, prime the joint chamfer with a primer according to the joint sealant manufacturer’s recommendations. For 706.052 and 706.053, cover all exterior joints with a 12 inch (300 mm) wide strip of joint wrap centered on the joint. Use a c ontinuous length of joint wrap sufficient to extend from the bottom of the vertical face on one side of the structure to the bottom vertical face on the other side. Next, apply all waterproofing as shown on the plans. Apply membrane waterproofing to the precast sections after they are installed.
4.For precast reinforced concrete box culverts, precast reinforced concrete 3-sided flat topped culverts, precast reinforced concrete arch sections, and precast 611.09 510 reinforced concrete round sections (706.05, 706.0 51, 706.052, and 706.053), apply an approved epoxy -urethane sealer per the plans to all top surfaces not covered by membrane waterproofing. Extend sealer 1 foot (0.3 m) below the backfill on all sides of the culvert sections including the joint.
C.Plasti c Conduit. Join plastic conduit, Types A, B, C, D, and F, using either coupling bands, bell and spigot joints, or bell -bell couplers. Join the conduit according to the following requirements.
1.Coupling bands. Furnish coupling bands of the same size as th e conduit and that engage at least two full corrugations on each conduit section. Furnish gasketed coupling bands of the same material as the plastic conduit.
2.Bell and spigot joints. If using bell and spigot joints, drive the spigot securely into the be ll. For gasketed joints, ensure that the gasket is properly seated after joining.
3.Bell-bell couplers. If using bell -bell couplers, drive the conduit securely into the coupler.
D.Type E Conduit . Join Type E conduits with open joints by butting the ends and wrapping with a minimum 4 inch (100 mm) wide tarred paper or tarred burlap. Place soil around this material to hold it in place during backfilling.
611.09 Exterior Coatings and Membrane Waterproofing. Apply exterior
coatings and membrane waterproofin g as specified below. Protect the exterior coatings and membrane waterproofing from damage during placing of the bedding, backfill, and embankment.
A.For 611.08.B.3. concrete conduit, clean the surfaces before placing the membrane waterproofing. Apply mem brane waterproofing as specified. Apply the membrane waterproofing to all surfaces that will be in contact with the backfill (top and sides) according to the membrane waterproofing manufacturer’s recommendation.
B.For structural plate metal structures an d corrugated metal box culverts (707.03, 707.15, 707.23, and 707.25) , apply waterproofing by one of the following methods.
1.Coat the exterior of the conduit above the limits of the bedding and within the limits of backfill. Ensure that all plate seams a nd bolts are thoroughly sealed. Furnish coating material and apply it according to AASHTO M 243. Allow asphalt mastic material to dry 48 hours and tar base material to dry 28 hours before placing the conduit backfill. Rib stiffeners do not need to be coate d.
2.Construct buried liner waterproofing membrane protection in the fill according to the manufacturer’s recommendations. The buried liner waterproofing membrane protection must be a continuous sheet placed over the conduit and extend at least 10 feet ( 3.3m) outside of the paved shoulder and for the width of the trench. Seams constructed in the field are not acceptable.
611.10 Drainage Structure Construction . Install drainage structures as shown
on the plans and standard construction drawings. Maintain f lows at all times until the new facilities are completed and in service. 611.10 511 Visually inspect all precast drainage structures before they are placed. Replace all drainage structures that are damaged as determined by the Engineer. Install each drainage structur e casting to the elevation, station, and offset shown on the plans. Any deviations must be approved by the Engineer. If the Engineer does not approve the deviation, stop all related work until the drainage structure is reinstalled. The offset is to the cen ter of the casting. Place each manhole base so that it is in alignment with the pipe and its invert elevation according to the standard construction drawings. Use flat slab top manholes as shown on the standard construction drawing. Do not remove the flat slab top manhole lifting devices. Locate or cut conduits so any protrusion inside the structure wall is minimized. Set iron frames, tops, and covers in mortar with a flush joint. Prevent earth or debris resulting from construction operations from entering the drainage structure. Remove any debris resulting from construction. Thoroughly grout the underdrain outlet pipe to the precast reinforced concrete outlet with a flush mortar joint. Take adequate precautions to prevent concrete or mortar from freezing. Preheat the brick, concrete block, or precast concrete structure throughout the entire mass to a temperature between 50 to 80 F (10 to 27 C) before placing mortar if the ambient temperature is 40 F (4 C) or less.
A.Brick and Block Masonry. For brick and block masonry drainage structure construction thoroughly wet the units before placing in mortar. Lay the units with a flush mortar joint. Cure the exposed surfaces of all brick and block masonry by covering with wet burlap or by applying a curing membr ane according to 705.07. Keep burlap wet for at least 48 hours.
B.Modular Precast Concrete. For precast concrete modular drainage structures furnish precast bases on a compacted bed with or without a bedding material as described in the installation plan. Ensure that the bed is level and uniformly supports the entire area of the base. Seal all joints between modules as described above for concrete conduit. All penetrations through precast drainage structures must be either manufactured or cored. After plac ing the conduit, grout all openings less than 4 inches (100 mm) between the pipe and structure with mortar. Grout all openings greater than 4 inches (100 mm) between the pipe and structure with non -shrink mortar. Furnish the same curing membrane for barrie r inlets as that used on the barrier. Apply the curing membrane according to 622.07.
C.Reconstruction to grade. When reconstructing an existing manhole, catch basin or inlet to grade, follow the procedure below.
1.Carefully remove and clean the existing castings.
2.Remove the existing walls of manholes down to the spring line of the conduit or below as necessary. Remove existing walls of catch basins and inlets below the window openings, grates, or any points of wall failure. 611.11 512 3. Using the salvaged castin g, reconstruct the structure to the new grade, conforming as nearly as practicable to the existing dimension and type of construction.
D.Adjustment to grade. When adjusting an existing manhole, catch basin, or inlet to match grade, follow the procedure b elow.
1.Carefully remove and clean the existing frame, adjust the height of supporting walls, and reset the existing frame in mortar or concrete to the new grade.
2.Carefully remove the existing cover or grate and install a casting or an acceptable adjus ting device on file at the Laboratory or an adjusting device approved by the Engineer to the new grade and install according to the adjusting device manufacturer’s recommendations.
611.11 Field Paving of New or Existing Conduit. Field pave the bottom of th e
conduit with concrete as shown on the plans. Installation Plans are not required for field paving of existing conduits. Include any field paving details in the Installation Plan for all new conduit. For new pipe installations, do not pave until at least 4 feet (1.2 m) of fill is placed on top of the conduit or the top of subgrade is reached. If the paving is placed before completion of the entire fill, clean any gaps between the conduit and concrete paving, and then fill with heated bituminous material c onforming to 705.04. Reinforce the paving with 2 x 2 -W0.9 x W0.9 galvanized welded wire fabric or epoxy coated reinforcing steel meeting the material requirements of 509.02. Provide galvanized wire fabric or epoxy coated reinforcing steel with a width 4 inches (100 mm) less than the finished paving. Provide support beneath the mesh where necessary using galvanized support chairs or #4 epoxy coated reinforcing steel . Securely fasten the mesh to t he conduit near each edge and at the center of the mesh at points not more than 4 feet (1.2 m) apart along the flow line of the culvert. Securely fasten the epoxy coated reinforcing steel to the conduit at each end and along the length of the steel not mor e than 4 feet (1.2 m) apart. Repair any damage to the galvanizing or other coating material caused by placement or by tack welding. Use wire brushing and zinc rich paint to make the repairs. For aluminum structural plate, securely fasten the mesh to the ci rcumferential seam bolts with galvanized tie wire. Construct paving so that it is 3 inches (75 mm) thick measured from the top of the corrugations of the conduit to a height equal to 1/3 of the rise. Maintain the position of the mesh while placing concrete . After placing the concrete, strike it off with a template to produce the proper radius, and finish with a float to produce a smooth finish. Cure the concrete according to 451.11. When field paving existing conduits, maintain flows in accordance with 611. 07. When standing water is encountered and cofferdams are necessary, construct and pay for cofferdams per Item 503.
611.12 Performance Inspection . Notify the Engineer at least five workdays
before conducting a performance inspection. Ensure the Engineer i s present during all performance inspection activities. 611.12 513 For all Type A, B, and C conduits, inspect all lengths greater than 20 feet with slopes of 25 percent or less and all new drainage structures. Performance inspections are not required for all Type D, E and F conduits. A performance inspection is not required for projects that meet all of the following: All conduit is Type C Conduit plan quantities are less than 100 feet (30.5m) All conduit has less than 16 feet (4.8m) of maximum fill height In each ph ase of construction of a conduit, perform the inspection no sooner than 30 days and no later than 90 days after the completion of the finished grade when not below pavement and after the completion of the rough subgrade when any portion of the conduit is b elow pavement. The Engineer may permit inspection beyond the 90 day limit. If any corrections are made to the installed pipe after the completion of the finished grade or rough subgrade and prior to the performance inspection, wait 30 days after the correc tion was made to do the performance inspection. If the contract duration will not permit a 30 day waiting period then the Engineer may adjust the waiting period. Visually inspect for surface settlements within the trench limits or within 4 feet of a draina ge structure. Document all locations of surface settlement in the inspection report. Furnish a video recording of all conduit and drainage structure inspections. On the recording, identify the date and time of the inspection, a description of the conduit or drainage structure being inspected, the location, and the viewing direction. Record the entire run of conduit being inspected. Provide a source of light that allows all areas of concern to be readily observed on the video recording. Furnish the video re cording in a digital, reproducible format on one of the following media types: Portable hard drive, flash drive or as determined appropriate by the Engineer. Provide the video file s with a naming format consistent with the Installation Plan references or as determine acceptable by the Engineer . Ensure that the condition of the conduit will allow an accurate inspection. Perform a manual inspection on drainage structures. Perform either a manual inspection or remote inspection as follows: Non-circular conduits Manual inspection Conduits with a rise of 48 inches (1 .2 m) and greater Manual inspection Conduits with a rise of 36 inches (900mm) up to 48 inches (1200mm) Manual or Remot e inspection Conduits with a rise of 12 inches or greater up to 36 inches (300 to 900 mm) Remote inspection Conduits with a rise less than 12 inches (300 mm) and Type D, E, and F conduits – Remote inspection as directed by the Engineer. The Department wi ll pay for this inspection according to 105.10.
A.Manual Inspection . Perform a manual inspection by entering the conduit or drainage structure to record video and to make measurements. If the conduit or 611.12 514 drainage structure is considered a confined space, p rovide entry for all project inspection personnel according to OSHA requirements. Measure the deflection of the conduit using either a metal tape, fabric tape or equipment accepted by the Engineer and read to the nearest ½ inch (10 mm). Measure crack width using either a crack comparator or a feeler gage capable of measuring 0.01 inch (0.25 mm). Measure joint gaps using a tape or ruler and read to the nearest ½ inch (10 mm). Other measuring devices may be used if approved by the Engineer. Record the measure ments and include them in the performance report. Measure the following:
1.For all conduits, measure the location, length, and greatest width of each crack.
2.For flexible conduit, measure the smallest inside diameter three times for each conduit sectio n in the run. Take the first measurement vertically from the crown to invert (12 o’clock to 6 o’clock positions). Take the second measurement by rotating 60 degrees from vertical (2 o’clock to 8 o’clock positions). Take the third measurement by rotating 12 0 degrees from vertical (4 o’clock to 10 o’clock positions). For all measurements, stretch tape to full extent across inside of pipe. For corrugated metal conduit, the inside diameter is defined as the distance between the inside peaks of the corrugations.
3.For all conduits, measure the widest gap at each joint in the run.
4.For conduit with manufactured seams, measure the location, length, and greatest width of any separation at the seam.
5.For drainage structures, measure the location, length and greatest width of each crack and the widest gap at each conduit entering the drainage structure. Record the location of any other defect not listed above and describe the defect. For each measurement location in a conduit, record the length from the neares t drainage structure.
B.Remote Inspection . Perform a remote inspection by using a crawler mounted camera to record video and using equipment described below to make measurements. Use equipment that meets the requirements of Supplemental Specification 902 (SS902) . Remove all debris from the conduits being inspected according to 107.19. Dewater the conduit if the water level hinders the performance of the equipment. Based on the type of conduit, make measurements using the equipment listed in the following table. Also record the location of any other defect not listed below and describe the defect. 611.13 515 TABLE 611.12.B Conduit Type Measurement Equipment Type of Measurement Rigid conduit and 707.11, mortar lined corrugated steel pipe, 748.06, steel casing pipe Crawler mounted camera according to SS902.01with crack measuring capabilities according to SS902.02 C Joint gaps Crack widths Plastic conduit, 707.12, corrugated steel spiral rib conduit, 707.24, corrugated aluminum spiral rib conduit, 748.01, ductile iron pipe, and Circular corrugated metal conduit not listed below Crawler mounted camera with laser profiler according to SS902.02 A, B, and C or Mandrel according to SS902.03 and Crawler mounted camera according to SS902.01 with crack measuring capabiliti es according to SS902.02 C Joint gaps Crack widths Deflection The following types of corrugated metal conduit: 707.04, precoated, galvanized steel culverts
707.05 and 707.07, bituminous
coated corrugated steel pipe with paved invert,
707.13 and 707.14, b ituminous
lined corrugated steel pipe Crawler mounted camera with laser profiler according to SS902.02 A, B, and C Joint gaps Crack widths Deflection
611.13 Conduit Evaluation . Have an independent Registered Engineer review
the conduit Performance Inspection and record all defects listed in Table 611.13 or as otherwise identified from the inspection. Provide all recorded defects and the recommended repairs to the Engineer. Eval uate the defects to ensure structural stability and hydraulic capacity are in conformance with the contract documents and as prescribed by AASHTO LRFD Bridge Construction Specifications, Section 26 for metal conduit, Section 27 for concrete conduit, and Se ction 30 for plastic conduit with modifications according to this specification. The independent Registered Engineer cannot be an employee of the Contractor or the conduit manufacturer. When using a laser profiler, the conduit deflection must be calculated from the actual inside diameter at the measured location or calculated by inputting the nominal diameter. When using a mandrel, the mandrel must be sized according to 902. If the evaluation determines repairs are not necessary and repairs are not required based on the type or size of the defect in Table 611.13, have the independent Registered Engineer make the following statement in the evaluation: “I certify that repairs are not required to address the defects identified during the conduit evaluation. The conduit will function in accordance with the contract documents.” 611.13 516 If the evaluation determines repairs are necessary, or if repairs are required based on the type or size of the defect in Table 611.13, have the independent Registered Engineer prepare, si gn, seal, and date plans for the repair. The independent Registered Engineer must make the following statement on the repair plans: “I certify that this repair plan was designed to ensure the repaired conduit will function structurally and provide hydrauli c capacity in accordance with the contract documents.” TABLE 611.13 Metal Conduit Evaluate if infiltration is observed. Evaluate all racking, buckling or denting. Evaluate all vertical sags or misalignments exceeding 0.1 ft. Repair or replace vertical sags or misalignments of 0.25 ft and greater. Evaluate the overall vertical alignment of the conduit recorded in CA -P-1. Evaluate if the joint gap exceeds the Manufacturer’s tolerance*. Repair or replace conduit if the joint gap exceeds the Manufacturers tolerance *. Repair all damage to coatings. Repair or replace conduit if the Performance Inspection per 611.12 indicates a deflection > 7.5%. Replace conduit if the Performance Inspection per 611.12 indicates a deflection > 12% Rigid Conduit Evaluate if infiltration is observed. Evaluate if joint gap exceeds the Manufacture’s tolerance*. Evaluate all vertical sags or misalignments exceeding 0.1 ft. Repair vertical sags or misalignments of 0.25 ft and greater. Evaluate the overall vertical alignment of the conduit recorded in CA -P-1. Repair or replace conduit if the joint gap exceeds the Manufacturers tolerance* . Repair or replace conduit if cracks > 0.10 inch. Repair or replace conduit if spalls or slabbing are observed. Plastic Conduit Evaluate if infiltration is observed. Evaluate all racking, bulging or buckling. Evaluate if joint gap exceeds the Manufacturers tolerance*. Evaluate all vertical sags or misalignments exceeding 0.1 ft. Repair vertical sags or misalignments of 0.25 ft and greater. Evaluate the overall vertical alignment of the conduit recorded in CA -P-1. Evaluate all cracks. Repair or replace conduit if the joint gap exceeds the Manufacturer’s tolerance*. Repair or replace conduit if Performance Inspection per 611.12 indicates a deflection > 7.5%. Replace conduit if the Performance Inspection per 611.12 indicates a deflection > 12% * Note: The tolerance is defined as the maximum joint gap listed in the Installation Plan. Submit the evaluation, repair plans, and revised installation plan to the Engineer at least 7 days before performing the repairs. Provide written confirmation from the conduit manufacturer that the repair methods are appropriate. The Department may review the submittal, but Department acceptance is not r equired. If the Department does not review the plan, proceed with the repairs 7 days after delivering the submittal to the Engineer. If the Department reviews the submittal and determines it 611.14 517 does not conform to the Contract, revise, resubmit, and proceed w ith the repairs only after the Department accepts the resubmittal. Perform the repair at no additional cost to the Department. Perform an inspection to evaluate the repaired portion of the conduit and any conduit potentially affected by the repair work 30 days after the repair has been made. Perform the inspections according to 611.12 and at no additional cost to the Department. Have an independent Registered Engineer evaluate the inspection according to 611.13 and at no additional cost to the Department.
611.14 Drainage Structure Evaluation. Have an independent Registered
Engineer evaluate the drainage structures and any defects listed in the table below. The independent Registered Engineer cannot be an employee of the Contractor or drainage structure manuf acturer. TABLE 611.14 Defects requiring evaluation Connection between conduit and drainage structure has free flowing water, infiltration or has not been constructed in accordance with 611.10. Grate is more than 0.1 ft (30 mm) from horizontal or vertica l location documented on construction inspection form CA -P-3. Invert elevation is more than 5 percent of the conduit diameter or 0.1 ft (30 mm) from plan elevation, whichever is greater as documented on construction inspection form CA -P-1 Grates do not p roperly seat in the frame. Grates are not placed on the required slope. Grates or frames are broken or cracked. Drainage structure does not match the details on the standard construction drawing. Steps do not line up. Manhole top does not match plans. If the evaluation determines repairs are not necessary, have the independent Registered Engineer make the following statement in the evaluation: “I certify that repairs are not required to address the defects identified during the drainage struct ure evaluation. The drainage structure will function in accordance with the contract documents.” If the evaluation determines repairs are necessary have the independent Registered Engineer prepare, sign, seal, and date plans for the repair. The independent Registered Engineer must make the following statement on the repair plans: “I certify that this repair plan was designed to ensure the structure will function structurally and provide hydraulic capacity in accordance with the contract documents .” Perform the repair at no additional cost to the Department. Perform an inspection to evaluate the repaired portion of the drainage structure and any conduit potentially affected by the repair work 30 days after the repair has been made. Perform the inspections according to 611.12 and at no additional cost to the Department. Have 611.15 518 an independent Registered Engineer evaluate the inspection according to 611.14 and at no additional cost to the Department.
611.15 Surface Settlements. Repair any surface settle ment within the trench
limits or within 4 feet (1.2 m) of a drainage structure. Have an independent Registered Engineer evaluate the conduit according to 611.13 or the drainage structure according to 611.14. Perform all repair work at no additional cost to the Department.
611.16 Method of Measurement. The Department will measure conduit by the
number of feet (meters), measured from center -to-center of small drainage structures or between open ends including the length of pipe bends and branches. The Departm ent will not deduct conduit length for catch basins, inlets, or manholes where the distance measured in the direction of flow, including bends, is 6 feet (2
m.or less. Where the location of a drainage structure or an open end is changed with the approval of the Engineer to accommodate full conduit sections, the Department will measure the length placed. Conduits placed on slopes steeper than 3H:1V or with beveled or skewed ends will be measured along the invert. The Department will measure field paving of existing pipe by the number of feet (meters). The Department will measure Manholes, Inlets, Catch Basins, Inspection Wells, Junction Chambers, and Precast Reinforced Concrete Outlets, whether new, reconstructed, or adjusted to grade, by the number of each type of structure complete and accepted.
611.17 Basis of Payment. Payment for all inspections is included with the
contract unit price of the corresponding pay item. When a pay item calls for concrete encasement, the Department will pay for furnishing and placing the concrete encasement and for any additional excavation required under the contract unit price for the encased conduit. When a pay item calls for conduit to be field paved, all work and materials necessary for the item are included in the contrac t unit price for each conduit. All required repairs, including any settlement problems, must be made prior to acceptance. Payment for the repair is included with the contract unit price of the corresponding pay item. The Department will not make additional payment for repair work on conduit installed under this specification. All conduits and drainage structures installed without required submittals per
611.04 are considered unacceptable materials per 106.07.
The Department will pay for accepted quantities at the contract prices as follows: Item Unit Description 611 Foot (Meter) ___" (___ mm) Conduit, Type ___ 611 Foot (Meter) ___ ___ Conduit, Type ___ 611 Foot (Meter) ___" (___ mm) Conduit Reconstructed, Type ___ 611 Foot (Meter) Type ___ Precast R einforced Concrete
Source: Ohio Construction and Material Specifications, 2019 Edition. Pages 0–0 of 928.