Concrete slab on metal deck details showing spacing and clearances for core drills and penetrations through the top of deck flute, deck web, and bottom of deck flute. Holes through the top of deck flute maintain a twelve-inch minimum center-to-center spacing. Penetrations through the deck web or bottom of deck flute require an eighteen-inch minimum center-to-center spacing to adjacent holes. Spacing limits apply across a ten-foot width perpendicular to the direction of the deck span with individual spacing dimensions D1 through D6 restricted to twenty-four inches maximum.
1 D 2 D 3 D 4 D 5 D 6 D 1 D 10' WIDTH PERPENDICULAR TO DIRECTION OF DECK SPAN +D 2 +D 3 +D 4 +D 5 +D 6 ≤24" 12" MIN C L C L TOP OF DECK FLUTE BOTTOM OF DECK FLUTE PENETRATION THROUGH TOP OF DECK FLUTE DECK WEB HOLE TO ADJACENT HOLE 18" MIN C L C L PENETRATION THROUGH DECK WEB AND/OR BOTTOM OF DECK FLUTE HOLE C L
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