This structural plan detail shows a moment connection joining W21X83 and W21X101 steel beams across a central support column. A splice plate matching the flange thickness is bolted across the top flange using ten three-quarter-inch A325N bolts per side arranged in a staggered pattern. L3x2x3/16 deck support angles are provided typically along the assembly with specific edge distances and 3-inch fastener spacing. Dimensioned callouts detail the 4-foot total splice plate length, 8-inch plate width, and precise bolt spacings.
A2 SS.200 3" 3" 4'-0" 2'-0" 2'-0" L3X2X 3 16 / DECK SUPPORT ANGLE, TYP (10) 3 4 / " A325N (10) 3 4 / " A325N SPLICE PLATE MATCH FLANGE THICKNESS W21X83 W21X83 W21X101 1 14 / " 5 12 / " 1 14 / " 8" 3" 3" 3" 3" 1 1 2 / " 1 1 2 / " 3" 3"
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