Effective with the December 2018 Letting 370 2019 Standard Spec ifications Section 620 Concrete Corrugated Median and Concrete Median Nos e
620.1 Description
1.This section describes constru cting a concrete corrugated medi an or concrete median nose placed in one course on a pr epared foundation.
620.2 Materials
1.Use materials conforming to the following: Concrete ...................................................... ................................................................................................... 501 Joint filler .................................................. ................................................................................................ 415.2.3 Reinforc ement ................................................. ............................................................................................... 505
2.Furnish 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 II ancilla ry concrete as specified in 716.
620.3 Construction
1.The engineer will inspect concre te built under 620 for transverse cracking as specified in 415.3.17 for ancillary concrete. Repair cracke d concrete as the engineer dir ects.
2.Under the Concrete Corrugated M edian bid item, construct concr ete corrugated median including nose section, placed in one course on a prepared foundation.
3.Under the Concrete Median Blun t Nose bid item, construct a blunt concrete median nose section.
4.Under the Concrete Median Sloped Nose bid item, construct a sl oped concrete median nose section.
620.3.1 Preparing the Foundation
1.Prepare the foundation for the median by excavating to the lin es, grade, and cross-section the plans show and required for placing t he concrete. Remove and replace any soft or unsuitable material encountered with suitable material and thoroughly compact and f inish the foundation to a firm surface. Ensure the foundation is moist when placing the concrete.
620.3.2 Placing Concrete
1.If forms are required, set them to line and grade and secure i n place before placing the concrete.
2.Deposit the concrete to the pr oper depth, consolidate by spadi ng or vibrating, and strike off at the required elevation and crown. For m the required corrugations with tools and equipment appropriate for the purpose, according to the plan details.
3.If constructing the median adjacent to concrete pavement, plac e tie bars as specified for longitudinal joints in concrete pavement under 415.3.7.2 .
4.Broom finish the surface of the median unless specified otherw ise. Draw the broo m transversely across the full width of the medi an surface with adjacent strok es slightly overlapping. Perform brooming in a way that produces corrugations uniform in appearance and not greater than 1/8 inch deep. Complete the brooming befor e the concrete’s condition causes the surface to tear or become rough from the operation. Provide a finished surface free from rough or porous areas, irregularities, and depressions resulting from improper broom handling. Ensure brooms are the quality, size, and construction appropriate for the job and operated to produce a surface finish meeting the engineer’s approval.
6.Remove and dispose of all excava tion and surplus materials in the manner specified for in 205.3.12.
620.4 Measurement
1.The department will measure Conc rete Corrugated Median by the square foot acceptably completed, including the nose section.
2.The department will measure Concrete Median Blunt Nose and Con crete Median Sloped Nose by the square foot acceptably complet ed, for the nose section only.
620.5 Payment
1.The department will pay for measured quantities at the contrac t unit price under the following bid items: ITEM NUMBER DESCRIPTION UNIT 620.0100 Concrete Corrugated Median SF 620.0200 Concrete Median Blunt Nose SF Effective with the December 2018 Letting 371 2019 Standard Spec ifications 620.0300 Concrete median Sloped Nose SF
2.The department will adjust pay for crack repairs on concrete b uilt under 620 as specified in 416.5.2 for ancillary concrete.
3.Payment for Concrete Corrugated Median, Concrete Median Blunt Nose, or Concrete Median Sloped Nose is full compensation for pr eparing the foundation; for providing materials, including concrete, joint filler and tie bars; for hauling , placing, consolidating, shapi ng, finishing, curing , and protecting the concrete; and for disposing of surplus materials. Effective with the December 2018 Letting 372 2019 Standard Spec ifications Section 621 Landmark Reference Monuments
621.1 Description
1.This section describes construct ing landmark reference monumen ts, with or without covers.
621.2 Materials
1.Furnish materials conforming to the following: Concrete ...................................................... ................................................................................................... 501 Reinforc ement ................................................. ............................................................................................ 505.2 Miscellaneous metals .......................................... ..................................................................................... 506.2.3 Brick and concrete bri ck or block masonr y ..................... ............................................................................. 519.2 Mortar ........................................................ ............................................................................................... 519.2.3 Foundation backfill ........................................... ............................................................................................ 520.2
2.Use castings used for cast iron covers conforming to 611.2 for castings.
3.Make aluminum monuments and monum ent covers from an aluminum a nd magnesium alloy as the manufacturer determines.
4.Furnish 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 ancilla ry concrete as specified in 716.
621.3 Construction
621.3.1 Monument Location
1.Preserve in their original posit ion all landmarks within the c onstruction limits of the work under contract and that require reference monuments until construction and mar king of the landmark reference monuments.
2.In general, construct monuments in the landmark’s near vicinity, outside the construction limits of the work under contract, and at the exact locations, the engineer d etermines. However, if the contract specifies or the enginee r directs, construct monuments at the e xact locations of, and to replace, landmarks disturbed by the construction.
621.3.2 Placing Monuments
621.3.2 1 General
1.Under the Landmark Reference Monuments bid item, construct cas t in place or precast reinforced concrete monuments or aluminum monuments in holes excavated in the ground or, in the case of type C aluminum monuments, driven into the ground.
2.Place a department-furnished metal marker on all monuments, ex cept aluminum monuments. Place a contractor-furnished metal mark er, conforming to plan details, on all aluminum monuments.
3.Except if driving aluminum monuments, place or construct the m onuments in holes excavated in the ground. Make the holes the size and depth the plans show or as the engineer directs.
4.Remove and dispose of all surp lus excavation and materials as specified in 205.3.12.
621.3.2 2 Cast In Place Concrete Monuments
1.Fill holes with concrete and s trike off flush with the ground surface. Place a steel reinforcement rod in the concrete as the plans show . Place the metal marker while th e concrete is still plastic.
621.3.2 3 Precast Concrete and Non-Driven Aluminum Monuments
1.Level and thoroughly compact the bottom of the holes at the proper elevation. Place the monument and backfill with suitable material and thoroughly compact in 6 -inch layers.
621.3.2 4 Aluminum Drive-In Monuments
1.If the plans or the engineer specifies aluminum drive-in monum ents for use in unstable soils, drive the monuments into the ground to the minimum depth the plans show a nd drive the top flush with the surface.
2.Increase the depth as the engin eer directs to obtain a suitabl e foundation for the monument.
621.3.2 5 Monument and Cover
1.Under the Landmark Reference M onuments and Cas t Iron Covers an d Landmark Reference Monuments and Aluminum Covers bid items, construct cast in plac e or precast reinforced concrete monuments in holes excavated in the ground and covered with cas t iron covers or, if specified, aluminum monuments excavated or driven into the ground and cove red with aluminum covers.
2.Construct cast in place or preca st concrete monuments or aluminum monuments as specified in the above subsections, except as follows:
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Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 379–380 of 601. View official source ↗