This plan view details a typical square hollow structural section column base plate connection secured with three-quarter-inch diameter ASTM F1554 Grade 36 anchor bolts. The base plate features half-inch maximum oversized holes with three-inch by three-inch by half-inch plate washers having one-eighth-inch oversized holes. Edge distances are specified at two inches typically. Square hollow structural section columns are shown, though other shapes apply similarly.
AB PLAN VIEW: TYP. CONDITION COLUMN PLATE WASHER 3"x3"x1/2" (HOLE DIAM 1/8" OVERSIZE) 1/2" MAX OVERSIZE HOLE IN BASE PL, TYP TYP 2" TYP 2" COLUMN NOTES: 1. BASE PLATE THICKNESS SHALL BE 3/4" UON. 2. ANCHOR BOLTS SHALL BE 3/4"Ø ASTM F1554 GRADE 36. 3. SQUARE HSS COLUMNS ARE SHOWN, OTHER SHAPES ARE SIMILAR. 4. FOR MOMENT FRAME COLUMNS, SEE OTHER APPLICABLE DETAIL. A
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