5-135 SECTIO N 508 – SHEA R CONNECTORS 508.0 1 DESCRIPTION . This work shall consist of furnishing and welding shear connectors. 508.0 2 MATERIALS . Materials shall meet the requirements of the following subsection s: Welded Stud Shear Connectors ................................ ................................ ................. 714.10 508.0 3 WEATHE R LIMITATIONS . Application of stud shear connectors or other welding on shear connectors shall not be done when the base metal temperature is below 0°F or when the surface is wet or exposed to falling rain or snow. 508.0 4 PLACING , INSPECTING , AND TESTING .
a.General Requirements . The Contractor shall install the shear connectors as detailed in the Contract and the approved structural steel fabrication draw ings. Shear connectors shall be placed, inspected, and tested in accordance with AWS D1.5 . Welding procedures for automatically timed stud welding equipment do not need to be submitted for approval. Installation without automatically timed stud welding equipment and repair welding shall be done using an approved SMAW procedure. If, during the progress of the work, inspection and t esting indicate that the shear connectors being furnished are not satisfactory, the Contractor shall make changes in the welding procedure, welding equipment, and type of shear connector as necessary to provide satisfactory results. Such changes shall be m ade at the Contractor’s expense.
b.Studs . Installation and acceptance of stud shear connectors shall be in accordance with the requirements of AWS D1.5 . After being allowed to cool, the first two studs welded on each beam or girder shall be bent 45° by striking the stud with a hammer. If failure occurs in the weld zone of either stud, the procedure shall be corrected, and two additional studs shall be successfully welded and tested before any more studs are welded to the beam or girder. The Contractor shall promptly inform the Engineer of any chan ges in the welding procedure. 5-136 After the studs have been welded to the beams, the Engineer will make a visual inspection, and each stud will be given a light blow with a hammer. Any stud that does not emit a ringing sound when given a light blow with a hammer, that has been repaired by welding, or that has less than normal reduction in height due to welding shall be struck with a hammer and bent 15° from the correct axis of installation. In the case of a repaired weld, the stud shall be bent 15° in the direction that will place the repaired portion of the weld in the greatest tension. Studs that crack either in the weld or in the shank shall be replaced. All tested shear connectors that show no sign of failure shall be left in the bent position. The Engineer may select additional studs to be subjected to the bend test specified above. 508.0 5 METHO D OF MEASUREMENT . The quantity of Shear Connectors to be measured for payment will be on a lump sum basis for all the shear connectors installed in the complete and accepted work at each structure specified. 508.0 6 BASIS OF PAYMENT . The accepted quantity of Shear Connectors will be paid for at the Contract lump sum price for each structure specified. Payment will be full compe nsation for detailing, furnishing, transporting, handling, preheating, and welding of the material specified and for furnishing all labor, tools, equipment, and incidentals necessary to complete the work. Payment will be made under: Pay Item Pay Unit
508.15 00 Shear Connectors ................................ ................................ ...................... Lump Sum
5-137 SECTION 509 – CONCRETE BRIDGE DECK SURFACE PREPARATION
509.01 DESCRIPTION . This work shall consist of blanket diamond grinding concrete bridge deck s.
509.02 MATERIALS . Materials shall meet the requirements of the following subsections:
Water ................................ ................................ ................................ .......................... 745.01
509.03 SUBMITTALS . The Contractor shall submit a blanket grinding work plan to the Engineer. At a
minimum, the submittal shall include detailed procedures and information for the following:
a.Determining initial grinding depth.
b.Monitoring depth of grinding.
c.Determining location of wheel paths.
d.Depth of grinding for the second pass and any subsequent passes.
e.Repair procedures if the deck is damaged during grinding operations.
f.Remedial action if depressions exceed geometric limits of grinding.
1.Means of determining remaining clear cover over reinforcing steel for further grinding.
2.Subsequent grinding patterns if sufficient clear cover remains over the reinforcing st eel.
g.Manufacturer’s specifications for concrete bridge deck grinding equipment. The Agency will review the submittal for compliance with the requirements of the Contract. If the procedures or information do not conform to the Contract requirements, th e submittal will be returned as rejected. The submittal shall not be marked as approved or approved as noted until all of the required information has been received and reviewed. Once a complete submittal has been received, the Agency shall be allowed 21 c alendar days for the initial review period and 14 calendar days for the review of each subsequent resubmittal. The Contractor will not be permitted to begin grinding until the blanket grinding work plan has been marked as approved or approved as noted by the Agency. After the blanket grinding work plan has been marked approved or approved as noted, no changes shall be made without the written approval of the Agency.
Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 549–550 of 1,380.