Collar connections shall satisfy the following limitations:
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(1) Collar bolts shall be pretensioned 1¼-in.- (32-mm-) diameter high-strength bolts conforming to ASTM A574 with threads excluded from the shear plane and shall conform to the requirements of Sections 4.2 and 4.3.
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(2) The collar bolts shall be pretensioned to the requirements for ASTM F3125/ F3125M Grade A490 or A490M bolts in the AISC Specification.
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(3) Welding of CCT, CCM, and CCB pieces to form collar corner assemblies shall consist of PJP groove welds per Figure 10.6.
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(4) Welding of collar corner assemblies to columns shall consist of flare bevel groove welds with 3/8 in. (10 mm) fillet reinforcing per Figure 10.7.
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(5) Collar flanges shall be welded to CWX pieces with 5/16 in. (8 mm) fillet welds, each side per Figure 10.8.
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(6) Beams shall be welded to collar flange assemblies with CJP groove welds per Figure 10.9.