The AISC allows short slotted holes in any or all plies of slip critical connections, without regard to direction of loading, which is not something that's addressed in Section J.3 2(e). We have multiple situations where a diagonal brace connects to a plate at a column flange near the base, and a plate at the bottom flange of a beam. I asked to use short slotted holes, in the direction of the slope, but I was wondering if this would actually reduce the bolt value. These are not erection bolts... so the diagonal brace will not be field welded after erection. If that were the case, I don't think the hole size would be an issue. I know that the bolt value can be re-calculated using the short slots, if their use actually decreases the bolt value. There are two 3/4 A325 bolts at each connection. My question is.... does the use of short slots in this condition reduce the bolt value? I've been told that the use of short slotted holes will turn this connection into a slip critical connection, which in turn, reduces bolt value.
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