An eighteen-gauge closure sheet frames an opening in the steel roof deck to accommodate a structural post base plate below. The opening dimensions extend one foot beyond the post size on all sides, with a maximum four-inch clearance noted. Fastening consists of number ten self-tapping screws spaced at six inches on center all around into the top flutes of the underlying roof deck.
18 GA CLOSURE SHEET 1'-0" x 3W W=POST SIZE STEEL DECK OPENING BELOW TO ALLOW FOR INSTALLATION OF POST BASE PLATE #10 SCREWS 6" O.C. ALL AROUND TO TOP FLUTES OF ROOF DECK BELOW 18 GA CLOSURE SHEET 1'-0" W 1'-0" 1'-0" W 1'-0" MAX. 4"
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