A vertical steel column connects to a structural beam flange utilizing a 1/2-inch diameter ASTM A325 through-bolt assembly with a 1 1/2-inch gap. Two 1/2-inch diameter ASTM A325 bolts in long slotted holes secure a 1/2 x 4 x 0'-4 1/2 inch plate on each side of the column. A 3/8-inch web stiffener plate is welded to each side of the web at the column with 3/16-inch fillet welds on three sides typically. A section view details a 3/8 x 6 x 0'-9 inch plate layout with specified 1 1/2-inch and 3-inch edge distances.
1 1/2" 1 1/2" GAP 1 1/2" 4" PL 1/2 x 4 x 0'-4 1/2" EA SIDE OF COL 5/16 5/16 (2) 1/2" DIA A325 BOLTS IN LONG SLOTTED HOLES 3/8" WEB STIFFENER EA SIDE OF WEB AT COL 3/16 3/16 (3) SIDES TYP A A 1/2" DIA A325 THRU BOLT, TYP COLUMN PER PLAN (NO COL AT SIM) SECTION A-A TYP 1 1/2" TYP 1 1/2" 3" 6" PL 3/8 x 6 x 0'-9"
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