Wisconsin WisDOT Standard Specifications (within FDM) — Section 515

Effective with the December 2018 Letting 286 2019 Standard Spec ifications Section 515 Steel Grid Floors

515.1Description

(1)This section describes provi ding steel grid floors of the open type, or concrete filled type.

515.2Materials

(1)Furnish materials conforming to the following:

(2)All steel in steel grid floors shall conform to ASTM A36 , with a minimum copper content of 0.2 percent.

(3)Zinc coat open type grid floors according to ASTM A123 .

(4)For concrete filled type floors , use grade C, C-FA, C-S, C-IS, C-IP, or C-IT concrete. Provide QMP for

class I structure concrete as specified in 715.

515.3Construction

515.3.1 Fabrication

(1)Manufacture the steel grid floors to conform to the thickness, section, loading, and other requirements

the plans show; and so if assembled in place they conform to the camber the plans show. The engineer will reject steel grid floors not within 1/2 inch of s pecified camber. Serrate the top edges of open type grid floors.

(2)If fabricating the floor with t he main elements normal to the centerline of the roadway, extend the units

the full width of the roadway for roadways up to 40 feet wide. If multiple units are allowed, extend the units over at least 3 panels. If t he main elements are parallel to the centerline of the roadway, extend the section over no t less than 3 panels. If j oints are required , weld the ends of all main floor members at the joints over their full cr oss-sectional area to provide full continuity and, preferably, place joints, if assembling the floor in place, over a supporting member.

(3)Before fabricating, submit complete detailed shop drawings to the engineer for approval. These

drawings shall show the spacin g and size of component parts, th e size and length of welds, splices and trims, and complete assembly details, including size and lo cation of recommended erection welding.

(4)Fabricate and construct steel grid floors being filled with co ncrete to provide adequate support for the

concrete filler. 515.3.2 Erection

(1)Assemble the units or sections of the grid floor on the structure and weld the abutting main elements

and connecting members between the sections to provide full con tinuity for the entire floor or between any points the plans show. Weight the floor assembly down or cl amp it in place to make a tight joint with full bearing on its supports before welding. If there is a roadway crown, weld beveled bars to the stringer flange to provide a bearing surface parallel to the cr own, unless placing the stringers with their vertical axes normal to the crow n. Use the location, size, and length of the welds that the manufacturer recommends or as the engineer approves. 515.3.3 Welding

(1)Weld steel grid floors as the plans show and conforming to AWS D 1.1, Structural Welding Code -

Steel. 515.3.4 Painting

(1)Spot paint damaged places in the zinc coating and field welds with a department-approved zinc-rich

paint. Clean field welds of scale or slag and neutralize the welds as specified in 517.3.1.3.1 before spot painting. 515.3.5 Concrete Filler

(1)Mix, place, and cure the c oncrete as specified in 501 and 502. Unless directed otherwise, compact the

concrete thoroughly by vibrating. The vibrating device and manner of operation are subject to the engineer’s approval.

515.4Measurement

(1)The department will measure the St eel Grid Floor bid items by the square foot acceptably completed.

515.5Payment

(1)The department will pay for measured quantities at the contrac t unit price under the following bid

items: ITEM NUMBER DESCRIPTION UNIT

Effective with the December 2018 Letting 287 2019 Standard Spec ifications 515.4000 Steel Grid Floor Open (inch) SF

515.5000 Steel Grid Floor Concrete Filled (inch) SF

(2)Payment for the Steel Grid Floor bid items is full compensatio n for fabricating, zinc coating, and

furnishing the steel grid floor ; for providing paint and concre te; and for erecting and welding, painting, placing and curing concrete.

Effective with the December 2018 Letting 288 2019 Standard Spec ifications Section 516 Waterproofing

516.1Description

(1)This section describes providi ng rubberized membrane waterproo fing and dampproofing on concrete

surfaces of structures.

516.2Materials

516.2.1 Dampproofing

(1)Furnish asphalt dampproofing conforming to ASTM D449 type II and primer conforming to ASTM D41 .

(2)Furnish coal-tar pitch dampproofing conforming to ASTM D450 type I and a primer conforming to

ASTM D43 .

(3)Furnish emulsified asphalt dampproofing conforming to ASTM D1227 type II class 1 and a

manufacturer-approved primer. 516.2.2 (Vacant) 516.2.3 Rubberized Membrane

(1)Select the rubberized membrane, primer, and mastic from the de partment's APL. Use membrane at

least 60 mil thick. 516.3 Construction 516.3.1 General

(1)Do not perform dampproofing and waterproofing in wet weather or if the air temperature or the

concrete temperature is below 45 F, unless the engineer specifi cally allows.

(2)Do not cure surfaces that require dampproofing or waterproofin g with membrane curing material.

(3)Cure the concrete and finish the concrete surface as specified for concrete surface finish in 502.3.7

before applying dampproofing or waterproofing.

(4)During primer application, ensur e the concrete surface is dry and thoroughly clean, free from

contaminants, dust, or ot her loose material.

(5)Apply at a material temperatur e that allows uniform application. If required, heat material uniformly in a

kettle with an armored thermometer. Do not heat asphalt above 3 50 F or coal-tar pitch above 250 F. 516.3.2 Dampproofing

(1)Under the Dampproofing bid item, provide a prime coat and a finish coat of asphalt, coal-tar pitch, or

emulsified asphalt.

(2)Apply a light coating of the primer to the concrete surface after preparation, cleaning, and drying.

Apply the primer to thoroughly and uniformly coat the concrete surface. Apply the finish coat after the prime coat cures but is still tacky to the touch.

(3)Apply asphalt, coal-tar pitch, or emulsified asphalt so that i t uniformly and completely covers the

primed surface. Use n o less than 4 1/2 gallo ns, for each 100 sq uare feet of surface, of asphalt, coal- tar pitch, or emulsified asphalt. 516.3.3 Rubberized Membrane

(1)Under the Rubberized Membrane Waterproofing bid item, provide a prime coat, one layer of a

preformed rubberized asphalt and plastic film membrane, and col d-applied rubberized asphalt mastic.

(2)Prime the concrete surfaces wi th the membrane manufacturer's p rimer, applied by brush or roller at

the rate of 250 to 350 square fee t per gallon. Let the primer dry one hour or until tack free. Re-prime primed surfaces not c overed within 36 hours. Do not prime dense surfaces like metal, but ensure it is clean, dry, and free of grease, oil, dust, or other contaminants.

(3)Apply a single layer of membrane to the accepted primed surfac e. Overlap 9 inches at membrane

joints and double cover intersections to eliminate butt joints in the membrane. Chamfer or round the exterior corners.

(4)Apply a double layer of membrane around drains, posts, bolts, or other protrusions and liberally coat

them with mastic next to seams a nd protrusions after applying t he membrane.

(5)Apply a trowelled bead of cold-applied rubberized asphalt mast ic to the perimeter of the membrane

placed in any day's operation and to all outside edges of membr ane after placing the membrane.

(6)Make a careful inspection of t he membrane and patch any ruptures, misaligned seams, or other

discontinuities with membrane and place any required backfill m aterial against the membrane. Backfill within 30 days of installation o r otherwise protect from ultra violet radiation.

Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 295–296 of 601.

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514 Floor Drains, Deck Drains, and Downspouts

516 Waterproofing