A heavy steel column base plate anchoring assembly bears on a reinforced concrete pad footing and tie beam. The column base features a two-inch-thick Grade 50 base plate secured by eight one-and-one-quarter-inch-diameter ASTM F1554 Grade 105 anchor bolts with three-inch square plate washers, set over a two-inch non-shrink grout pad and a concrete shear key. A one-inch Grade 50 gusset plate and a diagonal brace connect to the column web and base assembly. Below, a truss girder intersects a column via a knife plate and three-eighths-inch stiffener plates at four-inch gauge, with a three-quarter-by-six-inch stabilizer plate left unwelded to the girder flange.
1" GUSSET PL (Fy=50KSI) WP B-B 2" THK BASE PL (50KSI) W/ (8) 1 1/4"Ø F1554 (GR 105) ANCHOR BOLTS EQ 28" CL OF COL 3" EQ 42" EQ 3" CL OF COL EQ EQ 6" MIN 6" MIN CL 4 FOOTING DETAIL N.T.S. 3" 3" B-B SECTION CL OF COL BRACE PER ELEV, TYP 1/2 1'-0" F.F. TOP OF PAD FTG 1/2" SAND OVER FTG TYP 2" NON-SHRINK GROUT PAD 3" CLR 3" CLR TYP 3/4" CLR TIE BEAM PER PLAN TIE BEAM REINF EDGE OF PAD FTG CJP TIE BEAM PER PLAN PAD FTG PER PLAN 2"x WIDTH OF PL x 8" SHEAR KEY (GR50) 3" SQ x 1" PLATE WASHER, GR50, TYP 1" ALL AROUND 6" 8" CJP EXTEND LONG BARS INTO FTG. TERMINATE BARS 3" CLR OF GROUT POCKET (TYP T&B) 9 1/2" 3" COL SEE PLAN TRUSS GIRDER SEE PLAN TYP BEAM SEE PLAN (3) 3/8" STIFF PL @ 4" GA TYP CENTERED 7/16 TYP GRID 1/4 14 TYP KNIFE PL 7/8"x1'-9" TYP 1/4 TYP 5/16 TYP 8" 1/2" PL 3/4"x1-2" WIDE W/ (2) 3/4"Ø ERECTION BOLTS (TYP) 3/4x6" STABILIZER PL (DO NOT WELD TO GIRDER) TOP OF PL 3" TYP
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