Small slab openings up to four feet in maximum dimension are reinforced with one number five bar placed top and bottom typically all around the perimeter. Diagonal corner reinforcement consists of one four-foot-long number four bar placed top and bottom at each corner extending one foot beyond the opening edges. These standard reinforcing details maintain structural integrity around penetrations in concrete floor and roof systems.
SMALL OPENINGS 1'-0" 4'-0" MAX 4'-0" MAX (1) #4x4'-0" T&B, TYP (1) #5 T&B, TYP ALL AROUND
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