507.02 Bearing Assemblies
372 The Engineer will not include t he weight of additional material required under Subsection 506.04.G(4)(b), “Erection Stresses,” to accommodate erection stresses or the weight of additional bearing stiffeners required under Subsection 506.04.G(3), “Bearings and Anchorages.” The Engineer will measure metal expansion joints in accordance with Section 518, “Construction Joints and Expansion Devices .”
506.06 Basis of Payment
The Depar tment will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.STRUCTURAL STEEL Pound [Kilogram]
B.STRUCTURAL STEEL A 709 GRADE HPS 70W (485W) Pound [Kilogram]
507.01 Description
This work consists of providing and installing bearing assemblies and elastomeric bearing pads.
507.02 Materials
A.General Provide materials in accordance with the following section and subse ctions: Material: Section or Subsection: Welding of Weathering Steel 724.03 Welding of Stainless Steel 724.05A Weathering Steel Bearing Assemblies 724.05.B Stainless Steel Bearing Assemblies 724.05A Elastomeric Bearing Pad 733.06
B.Steel Laminates Provide steel laminates in accordance with AASHTO M 270 Grade 50[345[248] or ASTM A 1011 Grade 40 [276].
C.Stainless Steel Provide stainless steel for Stainless Steel Bearing Assemblies in accordance with Subsection
724.05 A, “Stainless Steel Bearing Assemblies, ” for bearing plates and bearing assemblies, including
anchor bolts, nuts, washers, contact plates, and contact angles. BEARING ASSEMBLIES 507.04 373 D. Weathering Steel Provide weathering steel for Weathering Steel Bearing Assemblies in accordance with Subsection
724.05 B, “Weathering Steel Bearing Assemblies,” for bearing plate s and bearing assemblies, including
anchor bolts, nuts, washers, contact plates, and contact angles.
507.03 Equipment — Vacant
507.04 Construction Methods
A.Shop Drawings Submit drawings for the bearing assemblies and pads in accordance with Subsection 105.02, “Plans and Working Drawings, ” and Subsection 733.06, “Elastomeric Bearing Pads.”
B.Fabrication Assemble and check the geometry of bearing assemblies in the shop.
C.Packaging, Handling, and Storage Before shipping, mark the top of the bearing components and their orientation in the structure. Place bearings in protective packages. Dismantle bearing assemblies for inspection and installation. During storage, prote ct bearing devices and components at the work site from damage.
D.Installation Provide bearing surfaces on members and bridge seats with a smooth, uniform surface. Construct cast-in-place bearing surfaces in accordance with Subsection 509.04.K, “Girder Bearing Surfaces.” Set anchor bolts within 1/8” [3 mm] of the plan locatio n before placing concrete as specified in the plans or approved by the Engineer. When dowelling retrofit anchor bolts into pre-existing concre te, install them in accordance with Subsection 509.04.D(3), “Doweling into Existing Concrete .” Leave a ⅛ in [3 mm] gap between the top of the washers and the bottom of the nut on fixed and expansion bearing assembl ies. If the plan requires two nuts on each anchor bolt, tighten the top nut sufficiently against the lower nut to lock them together as a unit. Clean the bearing assemblies of deleterious materials. Install the bearings at the positions and dimensions sh own on Plans. Center anchor bolts in the slotted holes on expansion bearing plates. Set elastomeric bearing pads for bearing assemblies on level concrete without bedding material. Field weld bearing plates to bottom flanges or embedded sole plates as the Contract requires. Weld in accordance with Subsection 724.03, “Welding.” Weld the bearings after inspection. Do not expose the elastomer or bond to temperatures greater than 350 °F [175 °C]. If bearing plates are l ess than 1½ in [38 mm] thick, provide temperature measurements of the steel adjacent to the elastomer to ensure the steel does not exceed the temperature limitations. Replace the elastomeric bearing pads if the temperature exceeds 350 °F [175 °C]. Paint w eathering steel bearing plates after welding in accordance with Section 512 “Painting .” Use a Category “N ,” IZ-E-U paint system in accordance with subsection 512.04.B.(2) . Apply primer c oat in the shop. Apply top coats in the field as approved by the Engineer.
508.02 Concrete Culverts
374 If the centerline of the bearing does not horizontally line up within 2 in [50 mm] of the vertical bearing stiffener, weld additional bearing stiffeners to the steel beam or girder .
E.Elastomeric Bearing Pads Install elastomeric bearing pads between the top of the beam and the bottom of the bridge deck if the Contract requires.
507.05 Method of Measuremen T
The Department will measure the number of completed and accepted Fixed Bearing Assemblies, Expansion Bearing Assemblies , and Elastomeric Bearing Pads listed in the Bid Schedule that are completed and accepted for payment.
507.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the spec ified pay unit as follows: Pay Item: Pay Unit:
A.STAINLESS STEEL FIXED BEARING ASSEMBLY Each
A.WEATHERING STEEL FIXED BEARING ASSEMBLY Each
B.STAINLESS STEEL EXPANSION BEARING ASSEMBLIES Each
B.WEATHERING STEEL EXPANSION BEARING ASSEMBLIES Each
C.ELASTOMERIC BEARING PADS Each Include the cost of anchor bolts, bearing plates, contact plates, nuts, contact angles, nuts, plain or laminated elastomeric bearing pads, and welding in the contract unit price for Fixed Bearing Assemblies and Expansio n Bearing Assemblies . SECTION 508 CONCRETE CULVERTS
508.01 Description
This work consists of constructing concrete culverts including precast structures such as concrete arch culverts.
508.02 Materials
Provide materials in accordance with the following section and subsections: Material: Section or Subsection: Structural Concrete (Class AA) 701.01.A Reinforcing Steel for Structures 723 Joint Materials 726.01.B
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 386–387 of 935.