5-134 plates, trough or curtain support systems, downspouts and chute s, galvanizing, equipment, labor and incidentals necessary for furnishing and installing t he expansion devices and expansion dams. The accepted quantity of Fabric Trough or Fabr ic Curtain for Finger Joint will be paid for at the Contract price each, complete in place and accepted, which price shall include all materials, equipment, tools, labor and incidentals necessary for furnishing and installing the trough or curtain. Payment will be made under: P a y I t e m P a y U n i t
521.23 Expansion Device - Finger Joint Each
521.32 Fabric Trough for Finger Joint Each
521.33 Fabric Curtain for Finger Joint Each
SECTION 522 - EXPANSION DEVICES - MODULAR 522.011 Description This work shall consist of furnishing and installing shop fabricated modular expansion devices. This shall include, but not be limi ted to, neoprene seal elements, steel transverse dividers and end channels, support b ars and bearings, anchorages, sidewalk, median and curb expansion dams and barrier slide plat es, all as specified herein or specified in the Contract documents. 522.012 Materials Materials shall meet the requirements specif ied in the following Sections of Division 700 - Materials: Stud Shear Connectors, Anchor and Fasteners 711.06 Structural Steel 713.01 High Strength Bolts 713.02 Steel Extrusions 713.08 L u b r i c a n t A d h e s i v e 714.03 Gland Type Seals 714.06 All steel divider bars, end channels and support bars shall con form to the requirements of ASTM A572 Grade 50 Steel. Other steel plates shall conform to the requirements of ASTM A36 or ASTM A572. Shapes shall conform to the requirement s of ASTM A500, Grades A and B, or ASTM A992. Other weldable steels may be use d with the approval of the Fabrication Engineer. The entire assembly, unless otherwis e indicated on the Contract Plans, shall be hot dip galvanize d in conformance with AASHTO M 111 (ASTM A123). All miscellaneous materials such as stainless steel sliding surface s, bearings, etc. shall be as recommended by the manufacturer, and as approved by the Fabrica tion Engineer. The manufacturer shall submit full information on material specific ations and dimensional data for approval. 5-135 522.013 Design The modular expansion devices shall incorporate divider bars, end channels, divider bar supports, seals, a system to maintain the seals at a substantially equal spacing at all times, and joint armor incorporating a support s ystem for the divider bar supports and an anchoring system for fixing the expansion devic e to the supporting concrete. The expansion devices shall be capable of accommodat ing the movements specified in the Contract Documents. The system maintaining the seal spacing shall be subject to pri or approval by the Fabrication Engineer and shall be a design that does not employ a rigid scissor-type mechanical system. The seal spacing system shall at all times exert a positive control force, and shall have a certain amount of flexibility to absorb shock loads such as snowplow impacts. The sealing elements shall be gland type seals, and shall be fa bricated with lugs or other protrusions designed to have a positive interlocking action wit h the divider bars. Sealing elements that are continuous over the full width of the joint, and require a clamping element to fix the sealing element to t he top surface of the divider ba r(s), will not be accepted. The minimum joint opening between adjacent divider bars shall be ½ inch, and the maximum joint opening shall be 3-½ inches. The divider bars and end channels shall be extruded or rolled s hapes, designed to positively interlock with the sealing elements, and capable of sustaining all vertical and horizontal loads imposed by the traffic. The divider bar supports shall be supported on the joint armor in a manner incorporating sufficient flexibility to absorb vertical shock loads. The divider bars, divider bar supports and associated bearings, hardware, etc. shall be designed in accordance with the AASHTO LRFD Bridge Design Speci fications. The manufacturer shall submit computations and data to verify appro priate load carrying capacity and said computations shall show conformance to all ap plicable requirements, including fatigue criteria, of the AASHTO LRFD Bridge Construct ion Specifications. 522.014 Fabrication The expansion joints shall be shop assembl ed in accordance with the manufacturer's recommendations and in conformance with the details shown in the Contract Documents and in these specifications. All work shall be in accordance with the applicable provisions of Section 504, Structural Steel. Twenty-five percent of fu ll penetration welds shall be inspected by ultrasonic (UT) or radiographic (RT) examination. T wenty-five percent of fillet w elds and partial penetration welds shall be inspected by magnetic particle method (MT). Acceptance criteria shall be in accordance with the AWS D1.5 Bridge Welding Code. All shop wel ding shall be completed to the greatest extent possible before the steel is galvanized. Any welds to be made after the steel is galvanized shall be identified on the Shop Drawings. S teel surfaces welded subsequent to galvanizing shall be repaired to the requirements of ASTM A780 and 5-136 Annexes A1, A2 or A3. The dry film thickness shall be within t he range of 3 mils to 5 mils. Damaged areas of the galvanizing shall be similarly treated. The galvanizing on the metal surfaces in direct contact with th e neoprene seals shall be lightly sandblasted to a dull gray appearance to provide a high strength bond between the seal and mating metal surfaces, and to provide an appropriate s urface smoothness for installation. Alternately, this galvanized surface may be prep ared per the manufacturer’s published recommendations for installation and bonding of the s eals. Seal elements shall be furnished and shop installed in one cont inuous length. Splices in seals will be permitted at abrupt changes in horizontal alignme nt. Abutting surfaces of splices shall be shop-vulcanized together. The Contractor shall submit computations, Shop Drawings, erecti on drawings, and other Working Drawings in accordance with Section 105.7, Working Draw ings. The fabricated expansion device shall be preset by the manufact urer, before shipment, to the dimensions for 45 degrees Fahrenheit. Hardware for levelin g, shipping and adjusting the device shall be supplied as part of the assembled expansion dev ice. Final width adjustments of the prefabricated expansion device shall be made in the fiel d, immediately prior to the final concrete placement. 522.015 Delivery Modular expansion devices shall be delivered to the job site in one unit, fully assembled. No field joints will be allowed, unless shown on the Contract Documents, or approved by the Fabrication Engineer before shop fabrication. 522.016 Installation Following completion of the structural de ck slab, the expansion devices shall be installed in the blocked out portion of the sl ab and abutment backwall. Following final adjustment, the device shall be permanently fix ed in place, all shipping and adjustment devices shall be removed, surfaces shall be repaired as specified in Section 522.014, Fabrication, and concrete shall be placed to complete the deck slab and backwall to the lines and grades shown on the Contract Documents. 522.017 Method of Measurement Modular Expansion Devices will b e measured by each unit, complete in place and accepted. Each unit shall con sist of a modular expansion device, including anchorage system, seals, shipping and tempera ture adjustment devices, curb, sidewalk and median expansion dams and barrier sliding pl ates, as required. 522.018 Basis of Payment The accepted quantity of Modular Expa nsion Devices will be paid for at the Contract unit price each, which payment shall b e full compensation for all materials, equipment, labor and incidentals necessary for furni shing and installing the expansion devices, curb, sidewalk and median expansion dams and barrier sliding plates, as required. Payment will be made under: 5-137 Pay Item P a y U n i t
522.06 Modular Expansion Devices Each
SECTION 523 - BEARINGS
523.01 Description This work shall consist of designing, furni shing, testing and
installing bearings in accordance with this specification and i n conformance with the details shown on the Plans.
523.02 Materials
E l a s t o m e r 711.11 S t a i n l e s s S t e e l 711.12 P o l y t e t r a f l u o r o e t h y l e n e ( P T F E ) 711.13 S t r u c t u r a l S t e e l 713.01 P r e f o r m e d P a d s 713.03 Bronze or Copper-Alloy Bearing and Expansion Plates 713.04 A n c h o r R o d s 720.07 Miscellaneous materials, caulking or lubricant shall be as reco mmended by the manufacturer of the bearings.
523.03 Submittals The Contractor shall prepare shop detail, er ection and other
necessary Working Drawings in accordance with Section 105.7, Wo rking Drawings. The drawings will be reviewed in accordance with the applicable req uirements of Section 105.7. Changes and revisions to the reviewed Working Drawings shall re quire further review by the Fabrication Engineer.
523.04 General Requirements Requirements for the type of beari ng furnished are as
follows: S t e e l B e a r i n g s S e c t i o n s 523.10 thru 523.19 E l a s t o m e r i c B e a r i n g s S e c t i o n s 523.20 thru 523.29 P o t o r D i s c B e a r i n g s S e c t i o n s 523.30 thru 523.39 S p h e r i c a l B e a r i n g s S e c t i o n s 523.40 thru 523.49 Design of bearings shall be in accordance with AASHTO LRFD Brid ge Design Specifications and AASHTO/NSBA S teel Bridge Collaboration G9.1 Steel Bridge Bearing and Design Guidelines.
523.05 Fabrication Steel fabrication work, for all types of be arings, shall comply with
Section 504, Structural Steel.