Effective with the December 2018 Letting 343 2019 Standard Spec ifications Section 611 Catch Basins, Manholes, and Inlets
611.1 Description
1.This section describes constructing or reconstructing catch ba sins, manholes, inlets and similar structures, made of concrete, brick masonry, or concrete brick or block masonry, with necessary reinforcement, metal frames, grates and lids, including require d excavating and backfilling.
611.2 Materials
1.Furnish materials conforming to the following: Concrete ...................................................... ................................................................................................... 501 Brick masonry and concrete brick or block masonry ....................................................................................... 519 Mortar ........................................................ ............................................................................................... 519.2.3 Reinforc ement ................................................. ............................................................................................... 505 Structural steel .............................................. ............................................................................................ 506.2.2 Miscellaneous metals .......................................... ..................................................................................... 506.2.3 Trench backfill ............................................... .............................................................................................. 608.2
2.For cast in place structures fu rnish grade A, A-FA, A-S, A-T, A-IS, A-IP, or A-IT concrete conforming to 501 as modified in 716. Provide QMP for class III ancillary concrete as specified in 716.
3.For precast structu res conform to AASHTO M199 for circular str uctures and ASTM C913 for square and rectangular structures. Manuf acture in a plant listed under precast concrete fabricators on the department's APL. Conform to the specified AASHTO materials requirements for th e structure specified except as follows: - Use concrete with 565 pounds or more cementitio us material pe r cubic yard. - The contractor may use cement conforming to 501.2.1 or may substitute for portl and cement a t the time of batching conforming to 501.2.6 for fly ash, 501.2.7 for slag, or 501.2.8 for other pozzolans. In either case the maximum total supplementary cementitious content is limited to 30 percent of the to tal cementitious content by weight. - For wet cast use air-entrained concrete with 7.0 percent +/- 1.5 percent air content.
4.Use castings conforming to AASHTO M105, class 30.
611.3 Construction
611.3.1 General
1.Excavate and backfill as specifi ed for excavation for structur es in 206, except use trench backfill. Do not backfill concrete brick or bl ock masonry, bri ck masonry, or precast concrete set on mortar beds until at least 3 days after completing the unit.
2.Construct concrete as specified in 501, and as specified for culverts and retaining walls in 504.
3.Construct brick masonry and conc rete brick or block masonry as specified in 519.
4.Construct structural steel and miscellaneous metals as specifi ed for steel bridges in 506.
5.Cure the concrete by one o f the methods specified in 502.3.8 for curing concrete in substructure units.
6.The inlet and discharge elevations for catch basins, manholes, and inlets as indicated on the plans are subject to revisions necessary to fit field conditions. The eng ineer may increase o r decrease the depth of catch basins, manholes, or in lets in order to adjust their i nlet or discharge elevations.
7.Place precast reinforced base s on a 6-inch or thicker bed of u niformly compacted foundation backfill conforming to 608.2 .
8.Secure grade riser rings and adjustment rings with mortar, eng ineer-approved mastic, or using the manufacturer's recommended method . Do not dry stack adjustment rings.
611.3.2 Connections
1.Make inlet and outle t sewer pipe, s ewers, and conduit for conn ections with structures the same size, type, and class as the sewer pipe, sewers, and conduit to which connections are made and that they conform to the same pertinent requirements.
2.For pipe placed in masonry fo r inlet or outlet connections, ma ke it flush on the inside of the structure wall and extend the pipe throug h the walls and beyond the outsi de surfaces of the walls a sufficient distance to allow for connections with conduits or sewers. Care fully construct th e masonry around them to prevent leakage around their outer surfaces.
3.For fiber optic installations, permanently attach support asse mblies to the manhole wall and mortar seal around entering conduits. Effective with the December 2018 Letting 344 2019 Standard Spec ifications 611.3.3 Frames, Grates, and Lids
1.Set frames on full mortar beds e xcept as specified for placing concrete in 415.3.6.1 , or secure otherwise as the plans show. Fi t or secure the grates and lids to the frames to eliminate rocking or chattering.
2.Set the frames, grates, and lids accurately so the complete in stallation is at the correct elevation required to fit the adjoining s urfaces. If installed in concret e surfaces, set the frames or castings, and grout as necessary, as specified in 415.3.6.1 . Make sure the grates or lids are not in place while striking off and finishing the adjoining concrete.
3.Set frames located in pavement areas so that they comply with the surface requirements specified in
450.3.2 9 , Place a 6-foot straightedge over the centerline of each frame parallel to the direction of
traffic at the completion of the paving. Make a measurement at each side of the frame, average the 2 measurements. If this average is g reater than 5/8 inch, reset the frame to the correct plane and elevation. If this average is 5/8 inch or less but greater than 3/8 inch, the department will allow the frame to remain in place.
4.If the frame is higher than the adjacent pavement, then make t he 2 measurements at each end of the straightedge and average them.
611.3.4 Steps
1.Install steps in manholes as the plans show.
611.3.5 Reconstructing Catch Basins, Manholes, and Inlets
1.If the plans show and the contra ct provides, reconstruct exist ing catch basins, manholes and inlets to the required lines and elevations the plans show, including the salvaging and resetting of existing covers, unless the contract provi des for new covers or other sa lvaged covers.
2.Use construction methods conf orming to the requirements set fo rth above for the classes of work involved. 611.3.6 Covers for Catch Basins, Manholes, and Inlets
611.3.6 1 General
1.Place the frames on full mortar beds, except as specified in 415.3.6.1 , and adjust them to bring the complete installation to the required elevation.
2.Under the Manhole Covers Type M-Communications and Manhole Cov ers Type Q-Communications bid items, use covers stamped with "WISDOT COMMUNICATIONS" as t he plans show.
611.3.6 2 New Covers
1.If the plans show, the contract p rovides, or the engineer dire cts, provide new covers, including frames, grates, or lids, as the plans show, on both new and existing st ructures.
611.3.6 3 Salvaged Covers
1.If the plans show and the contra ct provides, remove, handle, s tore, and reinstall existing covers in a way that prevents damaging the covers. If the contractor damages covers through its own operations then the contractor shall repl ace them at no expense to the department.
2.Use construction methods conf orming to the requirements above for these installations.
611.3.7 Adjusting Catch Basin, Manhole, and Inlet Covers
1.Unless the contract provides otherwise, adjust existing covers , including frames and grates or lids, to the required elevation. Remove the existing fixture, adjust the top of the existing stru cture, and reinstall the fixture. Support the fixture on a collar of concrete, brick masonry, concrete bri ck or block masonry, a precast concrete grade riser ring, or a grade adjustment ring from the department's APL, constructed to hold the covers firmly in place.
2.Instead of adjusting the covers as specified above, the contra ctor may adjust the lids of covers on resurfacing projects, if the engineer allows, by using engineer -approved adjustment castings designed for the purpose.
3.A vertical change exceeding one foot in the elevation of a cov er, or requiring removal of masonry beyond the shimming or grade adjus tment device, is a reconstruction and the contractor must comply with 611 for reconstruction of catch basins, manholes, and inle ts.
611.3.8 Clean Out
1.The contractor shall clean out s oil, debris, or other accumulated matter from catch basins, manholes, inlets, or similar structures c onstructed or reconstructed unde r the contract bef ore the engineer will accept the work. Remove materials in all of these structures de posited or lodged due to the contractor’s operations. Effective with the December 2018 Letting 345 2019 Standard Spec ifications 611.4 Measurement
1.The department will measure the bid items under this section a s each individual unit acceptably completed.
611.5 Payment
611.5.1 General
1.The department will pay for measured quantities at the contrac t unit price under the following bid items: ITEM NUMBER DESCRIPTION UNIT 611.0410 Reconstructing Catch Basins EACH 611.0420 Reconstructing Manholes EACH 611.0430 Reconstructing Inlets EACH 611.0500 - 0599 Manhole Covers (type) EACH 611.0600 - 0699 Inlet Covers (type) EACH 611.1000 - 1999 Catch Basins (dimensions) EACH 611.2000 - 2099 Manholes (dimensions) EACH 611.2100 - 2199 Manholes Comm unications (dimensions) EACH 611.2500 - 2699 Manholes Variable (type) (dimensions) EACH 611.3000 - 3499 Inlets (dimensions) EACH 611.3900 - 3999 Inlets Median (number of grates) EACH 611.8105 Adjusting Catch Basin Covers EACH 611.8110 Adjusting Manhole Covers EACH 611.8115 Adjusting Inlet Covers EACH 611.9705 Salvaged Manhole Covers EACH 611.9710 Salvaged Inlet Covers EACH
611.5.2 Catch Basins, Manholes, and Inlets
1.Payment for the Catch Basins, Manholes, and Inlets bid items i s full compensation for providing materials, including masonry, c onduit and sewer connections, st eps, and other fittings; for excavating, backfilling, disposing of surplus material, and for cleaning ou t and restoring the work site; except that the department will pay for covers , including frames, grates an d lids separately.
2.The department will apply contract unit prices without adjustm ent to the quantities of catch basins, manholes, or inlets constructed to depths not greater than one foot above or below the elevations, the plans show. Catch basins, manholes, or inlets that the engineer orders constructed to depths greater than one foot above or below the el evations the plans show as s pecified for extra work in 109.4 .
611.5.3 Reconstructing Catch Basins, Manholes, and Inlets
1.Payment for Reconstructing Catch Basins, Reconstructing Manhol es, and Reconstructing Inlets is full compensation for providing required materials, including masonr y and fittings; for salvaging and reinstalling existing covers, inc luding frames, grates, or lids ; for necessary excavation, backfilling, disposing of surplus material, and for cleaning out and restori ng the work site.
611.5.4 Manhole Covers and Inlet Covers
1.Payment for the Manhole Covers and Inlet Covers bid items is full compensation for removing and salvaging the existing covers; and for providing new covers, in cluding frames, grates or lids, and other required materials and for installing and adjusting each cover. Old covers removed remain the municipality's property. 611.5.5 Adjusting Catch Basin, Manhole, and Inlet Covers
1.Payment for Adjusting Catch Ba sin Covers, Adjusting Manhole Co vers, and Adjusting Inlet Covers is full compensation for providing required materials, exclusive o f frames, grates, or lids available and designated for adjusting; and for removing, reinstalling and ad justing the covers. The contractor shall replace covers rendered unusabl e by the contractor’s operations , at no expense to the department.
611.5.6 Salvaged Manhole Covers and Inlet Covers
1.Payment for Salvaged Manhole Cove rs and Salvaged Inlet Covers is full compensation for removing the existing cover including fram es, grates, or lids; for clean ing, transporting, and s toring; for installing and adjusting; and for providing other required materials. Effective with the December 2018 Letting 346 2019 Standard Spec ifications Section 612 Underdrains
612.1 Description
1.This section describes providing necessary subsurface drainage by constructing trenches, placing designated pipes or drainage devices, and backfilling the trenc hes.
612.2 Materials
612.2.1 General
1.Furnish and use materials conforming to the following requirements. Furnish all pipe as perforated unless the plans show or the spec ial provisions specify unperfo rated pipe.
2.The contractor may furnish, unless the contract specifies othe rwise, one of the materials specified here in 612.2 under the Pipe Under drain or Pipe Underdrain Unpe rforated bid items.
612.2.2 Corrugated Steel Pipe
1.Provide corrugated steel pipe for underdrains conforming to type III culverts of AASHTO M36. Provide perforations conforming to cla ss I. Use sheets not less than 0. 052 inch thick for 6- inch underdrains or 0.064 inch for 8-inch to 21-inch, inclusive, diameter underdrains.
2.If installing the pipes underground, the contractor may furnis h coupling bands that have engineer- approved wedging, clamping, or othe r fasteners, instead of bolt s.
612.2.3 (Vacant) 612.2.4 Corrugated Aluminum Alloy Pipe
1.Use corrugated aluminum alloy pipe for underdrains conforming to type III pipes of AASHTO M196. Use a sheet not less than 0.060 inch thick. Provide perforation s conforming to the requirements for class I.
2.If installing the pipes underground, the contractor may furnis h coupling bands that have engineer- approved wedging, clamping, or othe r fasteners, instead of bolt s.
612.2.5 Corrugated Polyethylene Drainage Pipe
1.Use corrugated polyethylene drainage pipe for underdrains conf orming to AASHTO M252, type CP and AASHTO M294, type CP with class 2 perforations.
612.2.6 Polyvinyl Chloride Drainage Pipe
1.Use polyvinyl chloride drainage pipe for underdrains conforming to AASHTO M278.
612.2.7 Acrylonitrile-Butadiene-Styrene Drainage Pipe
1.Use acrylonitrile-butadiene-styrene drainage pipe for underdra ins conforming to ASTM D2680 , except do not apply the requirements fo r joint tightness. Use pipe per forated according to AASHTO M278, if perforated pipe is required. 612.2.8 Geotextile
1.Use a geotextile of knitted, wov en, or non-woven fibers of polyester, polypropylene, stabilized nylon, polyethylene, or polyvinylidene chloride. Do not use slit film woven fabrics for th is work. The fabric must conform to the following requirements: TEST METHOD VALUE[1] Minimum grab tensile strength ASTM D4632 35 lb Apparent opening size ASTM D4751 No. 30 - 200 Minimum permittivity ___ 1.35 s-1 [1] All numerical values represent m inimum/maximum average roll values (i.e., the aver age of minimum test results on any roll in a lot sho uld conform to or exceed the mi nimum values in the table).
2.Use knitted fabrics construct ed from continuous yarn. Non-wove n fabrics may be needle-punched, heat-bonded, resin -bonded, or combinati ons of these 3 types. Us e woven fabrics constructed from monofilament or multifilament yarns.
3.Use geotextile wraps of knitt ed construction that form a seaml ess sleeve and fit tightly over the pipe. If using geotextile wraps construct ed from woven or non-woven fabr ic then tightly wrap and securely fix to the pipe.
4.Clearly mark the geotextile r olls to identify the type of fabr ic.
5.If the engineer determines it i s necessary, they can obtain fa bric samples for testing from the job site.
6.If wrapping pipe underdrain, then the pipe shall conform to 612.2.5 for perforated underdrain.
612.2.9 Reinforced Concrete Apron Endwalls for Underdrain
1.Use material for endwalls conforming to 504 or 522.2 .
Referenced in this section
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Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 352–354 of 601. View official source ↗