In AISC's manual in Section J3.10(c) it's written "For connections made using bolts that pass completely through an unstiffened box member or HSS, see Section J7 and Equation J7-1"
Equation J7-1: Rn=1.8*Fy*Apb
where Apb=projected bearing area
I cant find how to calculate this "projected...
Can anybody explain the huge differences between these two tables for connections with only two to three bolts? Attached is a spreadsheet that compares them: