817 - PIPE CULVERTS, EROSION PIPE, STORM SEWERS, SANITARY SEWERS & END SECTIONS
800-57 (4) Joints. Before jointing bell and spigot pipe, remove all lumps, blisters, excess coating materials, oil and
grease from the bell and spigot ends of the pipe. Rub with a wire brush, wipe clean and dry the outside spigot and inside of the bell. Carefully place the packing, and tightly caulk to a uniform thickness. No loose or frayed ends of fiber may protrude into the space to be filled with joint filler. Carefully inspect each joint and check for proper depth before the joint runner is attached. The depth of load in lead filled joints shall be a minimum of 2 ¼ inches back of the face of the bell. In a melti ng pot near the joint to be poured, heat lead to the proper temperature so that when stirred the surface will show a rapid change in color. Before pouring lead, remove all scum. On the outside of the pipe, dam the pouring gate with clay to fill the joint even with the top of the bell. Make each joint with 1 pour completely filling the joint space. Caulk toward the joint gate to secure tight joints without overstraining the bells. If the packing has been insufficiently caulked, permitting the lead to be driven to a depth more than ¼ inch from the face of the bell at any point during caulking, remove the lead and remake the joint.
d.Sanitary Sewer System. Install the sanitary sewer system as s hown in the Contract Documents. Make all service connections unless specified otherwise in the Contract Documents. Use Grade 3.5 concrete that complies with SECTION 401 unless specified otherw ise in the Contract Documents. 817.4 MEASUREMENT AND PAYMENT The Engineer will measure all types of pipe by the linear foot, along the centerline of the pipe. Gain in pipe length due to the fit of the pipe sections at the coupling bands or joints is not measured for payment. The Engineer will measure each end section, concrete headwall and sanitary sewer system. The Engineer will measure fly ash slurry grout by the cubic yard. The Engineer will not measure ex cavation for separate payment. Payment for "Entrance Pipe", "Cross Road Pipe", "Ero sion Pipe", "Storm Sewer", "Sanitary Sewer", "End Section", "Concrete Headwall", "Fly Ash Slurry Grout" and "Sanitary Sewer System" at the contract unit prices is full compensation for the specified work. 818 - ENCASEMENT PIPE
800-58 Section 818
ENCASEMENT PIPE 818.1 DESCRIPTION Install the size and type of encasement pi pe specified in the Contract Documents. B I D I T E M U N I T S Encasement Pipe (*) (**) (***) Linear Foot *Size **Type ***Method 818.2 MATERIALS Provide the size and type of encasement pi pe specified in the Contract Documents. 818.3 CONSTRUCTION REQUIREMENTS Install the encasement pipe as detailed in the Contract Documents. The Engineer must approve the methods used to install the encasement pipe. Connect the encasement pipe as recommended by the manufacturer. If the Contract Documents specify compaction, backfill and compact the excavation according to
Division 200
818.4 MEASUREMENT AND PAYMENT The Engineer will measure encasement pipe by th e linear foot, along the centerline of the pipe. Payment for the "Encasement Pipe" at the contract unit price is full compensation for the specified work. 819 - BORED, JACKED OR TUNNELED PIPE
800-59 Section 819
BORED, JACKED OR TUNNELED PIPE 819.1 DESCRIPTION Install the designated pipe by boring, jacking or tunneling as shown in the Contract Documents. If the method of installation is not specified in the Contract Documents, the Contractor has the option to use any of the 3 methods. B I D I T E M S U N I T S * Pipe (Bored, Jacked or Tunneled) Linear Foot *Type and Size of Pipe 819.2 MATERIALS Provide materials that comply w ith the applicable requirements. Pipe ........................................................................................................................ DIVISIONS 1600/1900 Grout ..................................................................................................................... SECTION 401 819.3 CONSTRUCTION REQUIREMENTS
a.General. If the pipe is bored, jacked or tunneled under a highway, railroad, street or other structure, the installation of the pipe shall not interfere with the operation of the highway, railroad, street or other structure. Do not weaken or damage existing roadbeds or structures. If the grade of the pipe (at the point of boring, jacking or tunneling) is below ground, construct the pits or trenches necessary to install the pipe complying w ith OSHA requirements. Backf ill such pits a nd trenches upon completion of the pipe installation. Compact the backfill to Type A, MR-5-5, SECTION 205 . Submit to the Engineer for approval a detailed plan for the proposed method of installing the pipe. Install the pipe beginning at the lower elevation (downstream) and progressing to the higher elevation (upstream). Do not vary the final position of the pipe from the specified line or grade more than 1 inch in 10 feet. Variations, if any, shall be regular and in one directio n. The flowline shall be in the specified direction. Repair or replace, as determined by the Engineer , all pipes damaged or misa ligned during the boring, jacking or tunneling operations.
b.Boring. Use either a pilot hole or the auger method.
1.Pilot Hole Method. Bore a pilot hole (approxima tely 2 inches) the length of the crossing. Before boring the larger hole, check the pilot hole for line and grade at the opposite end of the bore from the work pit. The pilot hole serves as the centerlin e of the larger hole bored later.
2.Auger Method. Use a steel encasement pipe (of the approximate diameter of the pipe to be installed) equipped with a cutter head to perform the excavation. Use augers of sufficient size to convey the excavated material to the work pit. In unconsolidated soil formations, the Engineer will permit the use of a gel-forming colloidal drilling fluid (with a minimum of 10% high grade, bentonite) to consolidate the cuttings, seal the walls of the hole, lubricate the removal of the cuttings and lubricate the immediate installation of the pipe.
c.Jacking. Use heavy duty jacks suitable for the intended purpose. Use a jacking head and bracing between the jacks and the jacking head, to apply uniform pr essure around the ring of pipe. The Engineer will allow the use of joint cushioning material. Use a jacking frame or backstop. Use guides that support and direct the pipe in the proper line and grade. As the pipe is jacked, excavate the material just ah ead of the pipe (a maximum of 2 feet in advance). Remove the excavated material through the pipe. Excavation for the underside of the pipe, for a minimum of ⅓ of the circumference of the pipe, shall follow the contour and grade of the pipe. Ove r-excavation (maximum of 2 inches) for the upper half of the pipe is allowed. Th e over-excavation shall taper to nothing at the point the 819 - BORED, JACKED OR TUNNELED PIPE
800-60 excavation conforms to the contour of the pipe. Fill over-excavation in excess of 1 inch with a slurry grout the
length of the installation after the pipe is installed. The Engineer may allow the use of a cutting head of steel plate around the head end of the pipe. The cutting edge may extend a short distance beyond the end of the pipe. Construct (with inside angles or lugs) the cutting edge to prevent it from slipping back into the pipe. When the pipe jacking operations begin, to the extent possible, continue the operations without interruptions to prevent the pipe from becoming firmly set in the excavation.
d.Tunneling. Use a tunnel lining of sufficient strength to support the overburden. Fill the space between the tunnel lining and the limits of th e excavation with slurry grout. Pr ovide access holes in the tunnel lining (maximum spacing of 10 feet) for the grouting operations. 819.4 MEASUREMENT AND PAYMENT The Engineer will measure pipe by the foot along the centerline of the pipe. Gain in pipe length due to the fit of the pipe sections at the coupling bands or joints is not measured for payment. Payment for the specified "Pipe (Bored, Jacked or Tunn eled)" at the contract un it price is full compensation for the specified work. 820 - FLUME INLETS AND SLOPE DRAINS
800-61 Section 820
FLUME INLETS AND SLOPE DRAINS 820.1 DESCRIPTION Construct the designated type of flume inlets and slope drains as shown in the Contract Documents. B I D I T E M S U N I T S F l u m e I n l e t ( * ) E a c h S l o p e D r a i n ( * ) L i n e a r F o o t Slope Drain (Special) Linear Foot *Type: concrete, gr outed stone or stone 820.2 MATERIALS Provide materials that comply w ith the applicable requirements. Concrete and Grout ............................................................................................... SECTIONS 401 & 402 Aggregates for Concre te Not On Grade ................................................................ SECTION 1102 Stone for Flume Inlets and Slope Drains ............................................................... DIVISION 1100 Type 2 Liquid Membrane-Forming Compound .................................................... DIVISION 1400 Reinforcing Steel ................................................................................................... DIVISION 1600 Welded Steel Wi re Fabric ..................................................................................... DIVISION 1600 820.3 CONSTRUCTION REQUIREMENTS
a.Concrete. Construct flume inlets and slope drains as shown in the Contract Documents. Excavate to allow construction of forms and excavate to sufficient depth to obtain the designated thickness, elevation and grade. Prior to concrete placement, place reinforcement for conc rete inlets and drains as shown in the Contract Documents. Support reinforcement on bar chairs. Unless shown otherwise in the Contract Documents, construct concrete flume inlets and slope drains of Grade 3.0 (AE) concrete. Uniformly consolidate the concrete without voids. Cure and protect concrete according to
Division 700
b.Stone and Grouted Stone. Construct stone inlets and slope drains as shown in the Contract Documents. Place stones with ends and sides abutting. Use spalls to fill larger spaces be tween stones. Offset joints between stones with the joint in the row below. For grouted stone, pour and broom grout into spaces between stones until the spaces are completely filled. Immediat ely after the grout is placed, cure in the same manner as required for the concrete.
c.Backfill. Place backfill material along the sides of the inle ts and slope drains to the top of the outside edges. Compact the backfill to a density of 90% of the standard compaction of the material used. On projects where Type B compaction is required on the adjacent roadway, construct the compaction for flume inlets and slope drains to the requirements for Type B compaction, SECTION 205 . 820.4 MEASUREMENT AND PAYMENT The Engineer will measure each flume inlet. The Engineer will measure slope drains by the linear foot along the flowline of the slope drain. Payment for "Flume Inlets" and "Slope Drains" at the contract unit prices is full compensation for the specified work. 821 - FLAPGATES
800-62 Section 821
FLAPGATES 821.1 DESCRIPTION Construct the designated flapgate as shown in the Contract Documents. B I D I T E M U N I T S ( * ) F l a p g a t e E a c h *Size 821.2 MATERIALS Provide materials that comply w ith the applicable requirements. Cast Iron ................................................................................................................ DIVISION 1600 Structural Steel ...................................................................................................... DIVISION 1600 821.3 CONSTRUCTION REQUIREMENTS Place flapgates as shown in the Contr act Documents. Install flapgates to function and operate satisfactorily. Provide shop drawings as specified in DIVISION 700 . 821.4 MEASUREMENT AND PAYMENT The Engineer will measure flapgates by the each. Payment for "Flapgates" at the contract unit prices is full compensation for the specified work. 822 - UNDERDRAINS
800-63 Section 822
UNDERDRAINS 822.1 DESCRIPTION Construct the designated type of underdrain as shown in the Contract Documents. B I D I T E M S U N I T S *Pipe Underdrains (**) Linear Foot Aggregate for Blanket Underdrains Ton/Cubic Yard *Size, Diameter **Type 822.2 MATERIALS Provide materials that comply w ith the applicable requirements. Concrete and Grout ............................................................................................... SECTIONS 401 & 402 Aggregates for Concre te Not On Grade ................................................................ SECTION 1102 Aggregates for Blanket U nderdrains an d Back fill .................................................. DIVISION 1100 Underdrain Pipe Type Designation F Perforated Corrug ated Metal Pipe ........................................................... DIVISION 1900 H Polyvinyl Chlo ride Pipe .......................................................................... DIVISION 1900 T High-Density Poly ethylene Pipe ............................................................. DIVISION 1900 Underdrain Outlet Pipe G Corrugated Metal Pi pe ............................................................................ DIVISION 1900 K Polyvinyl Chlo ride Pipe .......................................................................... DIVISION 1900 S High-Density Polyethylene Pipe ............................................................. DIVISION 1900 If the type is not indicated in the Contract Documents, any of the types listed above are permitted. Provide underdrain pipes with a nominal minimum inside diameter of 6 inches, unless shown otherwise in the Contract Documents. Provide perforated and corrugated underdrain pipe with the same type of outlet pipe. 822.3 CONSTRUCTION REQUIREMENTS
a.Excavation for Pipe Underdrains. Excavate trenches for all lateral and longitudinal interceptor drains as shown in the Contract Documents. In case of conflict, where actual eleva tion of the strata or stratum to be intercepted is found to vary from designated elevation, the stratigraphy shall govern. When necessary, shore or sheet the trench to provide safe construction and backfilling. Construct trench bottoms for perforated pipe in firm material to permit the placing of aggregate for pipe underdrains underneath the pipe. If unstable material is encountered in the bottom of th e trench, place the drain pipe on an insulating course of aggregate for pipe underdrains of sufficient thickness (maximum 3 inches) to provide proper movement of water without danger of sealing or mudding off the underdrain, and to maintain proper alignment and grade of the pipe. Insulating courses of aggregate are only permitted under perfor ated pipe. If the unstable material is also permeable to the extent that water is lost through the bottom of the trench as determined by the Engineer, lower the drain into the impermeable material. The minimum trench width is 8 inches plus the exterior diameter of the underdrain pipe, unless shown otherwise in the Contract Documents. The basedrains sha ll be placed a minimum of 18 inches below the base of the pavement. 822 - UNDERDRAINS
800-64 b. Excavation for Blanket Underdrains. Perform excavation according to th e Contract Documents. Rest
the blanket drain upon the bedrock or other suitable material as shown in the Contract Documents. Shape irregularities on the bedrock surface so undrained pockets are not formed. In suitable material, roll and shape the embankment surface to proper crown. Prior to placing aggr egate for blanket underdrains, construct pipe underdrains built in connection with the blanket underdrain s, as shown in the Contract Documents.
c.Laying Underdrain Pipe. Lay all pipes on a minimum grade of 1%, unless otherwise shown in the Contract Documents. Close all dead ends of pipe underdrains with a concrete cap. Join metal pipe by means of approved coupling bands provided by the pipe manufacturer. Make all junctions and turns with wyes, tees and bends. When field cutting is required, cold or flame cut metal pipe as approved by the Engineer. Paint cut surfaces with an approved zinc-rich paint. Lay perforations down, unless shown otherwise in the Contract Documents.
d.Laying Outlet Pipe. Lay outlet pipe only on stable material with minimum of 1% grade, unless otherwise shown in the Contract Documents. Place me tal outlet pipe with ends abutting and join with manufacturer’s coupling bands to provide a watertight joint.
e.Backfilling Pipe Underdrains. Do not begin backfill without approval of the Engineer. Place backfill to prevent large cavities in the backfill and walls of the trench. Backfill overbreakage due to blasting of rock in trench excavation and widening due to caving of trench walls or overbreakage at construction outcrops with aggregate for underdrains. Where a portion of the trench above the underdrain backfill aggregate is to be filled with soil, use a compactable material. Place the material in layers and compact to a density equal to or greater than that required for the adjacent material, with a minimum of 90 % of standard compaction of the soil used.
f.Constructing and Backf illing Blanket Underdrains. Construct the blanket underdrain with a minimum thickness of 12 inches. When blanket underdrains are constructed over lateral or longitudinal underdrains, remove all debris that may have collected in the top portion of the pipe underdrain backfill so that the aggregate of the blanket underdrain will be in direct contact with the aggregate back fill of the lateral or longitudinal underdrains. Do not begin backfill without approval of the Engine er. Backfill all irregularitie s of the bedrock surface with aggregate for blanket underdrains. Backfill the lateral drain trench under the blanket under drain and round to an elevation of approximately 6 inches above the top of the trench. Maintain the rounded elevation free from mud or other objectionable material until the aggregate for the blanket underdrains is placed thereon. If necessary, in order to form a stable layer or cour se, spray the aggregate with water during the process of spreading and rolling. Perform the spraying so the force of the water will not wash the finer material to the bottom of the lift. When concrete pavement or soil backfill material is to be placed over the blanket underdrain, use fine aggregate (complying with DIVISION 1100 ) in the top 4 inches of the underdrain, or other approved granular aggregate provided these fine aggregates do not have more than 2% passing the No. 200 sieve (wash).
g.Pipe Underdrain Outlets. Use a concrete flume or other approved type of flume, constructed at the outlet end of pipe underdrains as shown in the Contract Documents. Use Grade 3.0 concrete to construct the outlet flume so that the flume is flush with the finished shoulder slope.
h.Underdrain Markers. Erect 1 guidepost to mark each outlet fl ume for pipe underdrains, at the location shown in the Contract Documents. Use either a 6-inch diameter treated wood post or a 3-pound per foot galvanized or baked on enamel metal channel post. Set guideposts according to SECTION 827 .
1.Wood Guideposts. Apply 2 coats of aluminum paint to the upper 18 inches of the wooden post. Apply a third coat of International orange, enamel paint to the upper 12 inches of the wooden post.
2.Metal Guideposts. Apply 1 coat of International orange, enamel paint to the upper 12 inches of the galvanized or baked-on enamel metal channel post.
i.Video Inspection. When specified in the Contract Document s, inspect completed underdrains according to subsection 845.3c . The video inspection of the completed underdrains will be subsidiary to the underdrain. 822 - UNDERDRAINS 800-65 For the video inspection, provide a video camera complying with the following requirements: high resolution, high sensitivity, waterproof and color; ability to pan and tilt to a 90° angle with the axis of the pipe and rotate 360°; capable of negotiating the various angle fittings used in the edge drain system; with sufficient lighting to provide a true color picture of the entire periphery of the diameter of the pipe; and with attachments that will maintain the cam era’s position in the center of the pipe. Provide a portable control unit of the video came ra complying with the following requirements: capable of adjusting the iris, fo cus, and light level intensity; has a color monitor (8 inch minimum) with a minimum standard resolution of 720 x 480 pixels to track the camera’s progress th rough the inspections; have 2 video input/output jacks for video recording, as well as digital playback verification through the built-in monitor; and have audio input to allow for dubbing of the video to incorporate comments as necessary. Provide a video camera system comply ing with the following requirements: has sufficient cable/push rod to conduct inspections to a length of 500 feet, and a distance counter to monitor the length of the inspection; and have a color video printer that will produce color pr ints of any observations of interest during the course of the inspection; include a digital video recorder (minimum quality 4-head industrial grade VHS type) with audio dubbing still frame and slow speed capabilities; and has software capable of generating a report that shows each defect, along with its location measured from the inspection entrance, and a still frame image of the fault. Provide an experienced video technician to operate the video camera system. 822.4 MEASUREMENT AND PAYMENT The Engineer will measure pipe underdrains by the linear foot. When aggregate for blanket underdrains is shown in the Contract Documents by the cubic yard, the Engineer will measure the cubic ya rds of aggregate in the vehicle at the time and place of unloading. When aggregate for blanket underdrains is shown in the Contract Documents by the ton, the Engineer will measure the tons of aggregate in the vehicle at the time and place of unloadi ng. Deductions will be made for all moisture in the material when measured by the to n. Determine the moistu re content according to DIVISION 2500 . The Engineer will measure and pay for guideposts used for underdrain markers according to SECTION 827, and the quantities will be included in the quantity of guideposts shown in the Contract Documents. Payment for "Pipe Underdrains" and "Aggregate for Blan ket Underdrains" at the contract unit prices is full compensation for th e specified work. 823 - PREFABRICATED INTERCEPTION DEVICES AND SLOTTED DRAINS
800-66 Section 823
PREFABRICATED INTERCEPTION DEVICES AND SLOTTED DRAINS 823.1 DESCRIPTION Install steel prefabricated inter ception devices and steel slotted drains at locations designated in the Contract Documents. B I D I T E M S U N I T S Prefabricated Interception Device (*) Each Slotted Drain (**) Linear Foot *Type **Diameter of CMP 823.2 MATERIALS
a.Steel Prefabricate d Interception Device. Provide steel interception devices fabricated to the dimensions shown in the Contract Documents and from components that comply with these requirements: provide steel bars for concrete reinforcem ent and steel fastener s that comply with DIVISION 1600 ; provide corrugated metal pipe that complies with DIVISION 1900 ; provide steel risers fabricated from the same base metal as the corrugated metal pipe;
b.Slotted Drains. Provide steel slotted drains fabricated to the dimensions shown in the Contract Documents and from components that comply with these requirements: provide corrugated metal pipe that complies with DIVISION 1900 ; provide steel grating and bu lkheads fabricated from the same base metal as the corrugated metal pipe;
c.Concrete. Provide Grade 3.0 concrete that complies with SECTIONS 401, 402 and 1102 . 823.3 CONSTRUCTION REQUIREMENTS Install the steel prefabricated interc eption devices and steel slotted drains at the locations and to the grades shown in the Contract Documents according to DIVISIONS 200 and 700. Repair any damage to the galvanized coating according to DIVISION 1900 . 823.4 MEASUREMENT AND PAYMENT The Engineer will measure each steel prefabricated interception device. The Engineer will measure slotted drains by the linear foot. Any required excavation, backfill or concrete pads are subsidiary to the prefabricated interception device or slotted drain. Payment for "Prefabricated Interception Device" and "S lotted Drain" at the contract unit prices is full compensation for th e specified work. 824 - CONCRETE SIDEWALK, STEPS AND RAMPS
800-67 Section 824
CONCRETE SIDEWALK, STEPS AND RAMPS 824.1 DESCRIPTION Construct concrete sidewalk, steps and sidewalk ramps with detectable warning strips compliant with the Public Rights-of-Way Accessibility Gu idelines (PROWAG) and according to the Contract Documents. Construct sidewalk ramps (detectable warning) comp liant with PROWAG on existing sidewalk ramps and according to the Contract Documents. B I D I T E M S U N I T S Sidewalk Construction (*) (**) Square Yard S i d e w a l k R a m p S q u a r e Y a r d Sidewalk Ramp (Detectable Warning) Square Yard Grade 3.0 Concrete Cubic Yard R e i n f o r c i n g S t e e l P o u n d *Thickness **"AE" denotes air-entrained concrete. No entry denotes concrete without air. 824.2 MATERIALS Provide materials that comply w ith the applicable requirements. Concrete and Mortar .............................................................................................. SECTIONS 401 & 403 Aggregates for On Grade Concrete ....................................................................... SECTION 1116 Paving Bricks Comp liant with PROWAG ............................................................. DIVISION 1300 Reinforcing Steel ................................................................................................... DIVISION 1600 Preformed Joints Type B ....................................................................................... DIVISION 1500 Joint Sealing Compound ....................................................................................... DIVISION 1500 Mortar sand (FA-M) .............................................................................................. DIVISION 1100 Silicon joint sealan t (Type NS) ............................................................................. DIVISION 1500 Ramp Panels Compliant with PROWAG ............................................................... DIVISION 1700 824.3 CONSTRUCTION REQUIREMENTS
a.Excavation. Excavate to the required depth and to a width that will permit the installation and bracing of the forms. Shape the foundation and compact to a fi rm even surface conforming to the section shown in the Contract Documents. Remove all soft and yiel ding material and replace with acceptable material.
b.Forms . Extend forms for the full depth of the concrete. Use straight forms, free from warp and of sufficient strength to resist the pressure of the conc rete without springing. Brace and stake forms so the forms remain true to line and grade until their removal. Slipform equipment may be approved by the Engineer and used on a satisfactory performance basis.
c.Placing Concrete. Unless shown otherwise in the Contract Documents, construct concrete sidewalks, steps and ramps in a single course of Grade 3.0 concrete. Thoroughly moisten the foundation immediately prior to the placing of concrete. Place concrete according to SECTION 401 . Uniformly consolidate the concrete without voids. Finish the surface with a wooden float. Finish all outside edges of the slab and all joints with a ¼ inch radius edging tool.
d.Reinforcement. Place reinforcing steel for steps, sidewalks or ramps as shown in the Contract Documents. Support bars on metal bar chairs and securely wire to prevent displacement during concrete placement. 824 - CONCRETE SIDEWALK, STEPS AND RAMPS
800-68 e. Sidewalk Ramps with Detectable Warning St rips Compliant with PROWAG – New Construction.
1.Paving Brick. Set the truncated dome paving bricks in a mortar bed as detailed in the Contract Documents. Construct the surface of truncated dome paving brick between the truncated domes flush with the adjacent sidewalk ramp surface. Fill the joints betwee n the truncated dome paving bricks with broomed-in mortar sand. The Engineer will check th e completed truncated dome paving brick surfaces with a 10-foot straightedge. The completed paving brick surfaces may not deviate more than ⅜ inch, unless the contour of the area exceeds this tolerance.
2.Cast-In-Place Prestressed Panels. Prior to the concrete achieving initial set, recess areas to receive prestressed panels below finished grade at locations shown in the Contract Documents. Use a wood float or tool recommended by the manufacturer to achie ve the proper depth and refinish the disturbed area. Prior to placement, pre-dampen the back side of the panel with clean water. Follow the manufacturer’s recommendations for preparing the panel when mortar is specified between the panel and fresh concrete. Install the panels immediately in r ecess areas of fresh concrete and lightly tap the panels to grade using a rubber mallet to establish bond and 100% surface contact. Square the edge s of the panels to provide a symmetrical alignment. Set the depth flush with the adjacent surfaces . Keep the tolerances between panels and surrounding surfaces within 1/16 inch. Maintain a 3/16 inch caulk joint between panels and seal with a Type NS silicon joint sealant. Edge around the panels as shown in the Contract Documents. Clean any concrete residue off of the panels with a damp sponge to provide a clean appearance. Protect the panels from concrete curing compound overspray.
3.Hardened Concrete Placement of Prestressed Panels. Recess the area 3/16 inch more than the thickness of the prestressed panels. Clean the surfaces of all dust, o il, grease, curing or sealing compounds, laitance or other surface contaminants. Mechanically abrade the concre te surface to provide a smooth surface profile. Fill cracks or voids with compounds that are approved by the panel manufacturer. Remove any high spots on the substrate by mechanical methods. Cut a large enough opening to permit expansion joints, when applicable. Install panels with a high-strengt h polymer modified concrete accordin g to the manufacturer’s installation instructions.
4.Cast-In-Place Composite Panels. Install accordi ng to the manufacturer’s in structions. Provide a manufacturer’s representative on site to instruct the Cont ractor and KDOT personnel in the correction installation procedures for the composite panels used. Prior to the concrete achieving initial set, finish th e concrete and recess areas to receive the composite panels below finished grade according to the manufacturer’s instructions. Use a wood float or tool recommended by the manufacturer to achieve the proper depth, and refinish the disturbed area. When possible, install a single, standard size panel large enough to comply with the length and width requirements in the Contract Documents. If installation of a single panel will not satisfy the dimensiona l requirements in the Contract Documents, arrange the installation of standard size panels so the total joint length and panel cutting is minimized. Cut only those prequalified panels listed as used for “all applications”. When cutting panels, utilize auxiliary anchor points, as recommended by the panel manufacturer. Select enough additional anchor points so that no anchor is more than 5 inches from the edge (measured perpendicular to the nearest edge) and adjacent anchors are no more than 24 inches apart.
f.Sidewalk Ramps (Detectable Warning). Construct the detectable warning section on an existing sidewalk ramp, according to the manufacturer’s instructions and this specification, including subsection 824.3e . Construct according to slopes and tolerances in the Cont ract Documents. Perform any necessary sidewalk ramp removal required to construct the detectable warning, without damaging the subgrade or sub-base. Install any necessary Grade 3.0 concrete required to construct the detectable warning. Properly dispose of all waste material, and l eave the area in a neat presentable condition.
g.Curing. Immediately after the finish ing operation, cure the sidewalk, ramps and steps according to
Division 700
h.Contraction, Construction and Expansion Joints. Form contraction joints at intervals shown in the Contract Documents. If not shown, form by placing a metal template having a minimum thickness of ⅛ inch into
Source: Kansas Standard Specifications for State Road and Bridge Construction, 2015 Edition. Pages 548–559 of 978.