A steel joist girder bears on a concrete pilaster within a precast wall panel, anchored by a three-quarter-inch steel plate matching the pilaster cap size and secured with four three-quarter-inch by fourteen-inch anchor bolts. The pilaster features three number three ties at one and one-half inches on center, along with typical horizontal and vertical reinforcing. An angle ledger and a wood nailer attach near the top of the wall, while an erection angle provides support below. A plan view of the girder seat details a slotted hole and steel plates welded with quarter-inch fillet welds. The joist manufacturer must design the girder seat to transfer a fifteen-kip unfactored lateral force from the wall to the joist girder.
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