Bracket-to-beam flange connections shall satisfy the following limitations:
- (1) When welded to the beam flange, the bracket shall be connected using fillet welds. Bracket welds shall conform to the requirements for demand critical welds in the AISC Seismic Provisions and AWS D1.8/D1.8M, and to the requirements of AWS D1.1/D1.1M. The weld procedure specification (WPS) for the fillet weld joining the bracket to the beam flange shall be qualified with the casting material. Welds shall not be started or stopped within 2 in. (50 mm) of the bracket tip and shall be continuous around the tip.
- (2) When bolted to the beam flange, fasteners shall be pretensioned ASTM F3125/ F3125M Grade A490 or A490M bolts with threads excluded from the shear plane and shall conform to the requirements of Chapter 4.
- (3) Beam flange bolt holes shall be 15/32 in. (29 mm) and shall be drilled using the bracket as a template.
- (4) When bolted to the beam flange, a 1/8-in.- (3-mm-) thick brass washer plate with an approximate width and length matching that of the bracket contact surface area shall be placed between the beam flange and the bracket. The brass shall be a half-hard tempered ASTM B19 or ASTM B36/B36M sheet.
- (5) When bolted to the beam flange, a 1-in.- (25-mm-) thick by 4-in.- (100-mm-) wide ASTM A572/A572M Grade 50 (Grade 345) plate washer shall be used on the opposite side of the connected beam flange.