This structural steel detail shows a stepped beam moment connection framing into a column flange with intersecting floor levels. A 3/4-inch-thick ASTM A572 Grade 50 top flange plate connects the left beam assembly. The column web and flange areas incorporate a 5/8-inch-thick ASTM A572 Grade 50 doubler plate alongside a 1-inch-thick ASTM A572 Grade 50 plate measuring 2 feet in length. Fillet welds of 3/8-inch and 7/8-inch typical sizes are specified at the connection interfaces. Bolted connections utilize standard configurations per structural notes.
CONNECTION SHOULD BE AS PER W18 TYPE "C" ON SHEET 2/S5.02 2' - 0" A572 GR.50 PLATE 1" THK. A572 GR.50 DOUBLER PLATE 5/8" THK. 3/8" TYP. 7/8" TYP. REFER CONNECTION DETAIL A FOR INFO NOT SHOWN A572 GR.50 TOP FLANGE PLATE 3/4" THK DETAIL - C (STEP AT COL WEB) FOR BEAM CONNECTION REFER TO DETAIL 6/S5.11
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