Slab Penetrations

In that Hambro^® slabs are reinforced concrete, there is some flexibility to frame and form openings on the plywood before concreting. Depending on the size and shape of the penetration, Styrofoam, sheet metal or 2 x 4’s are routinely used to form desired openings. It is always necessary to make sure that openings do not encroach within 6” from either side of the joist top chord. The slab around openings shall always be reinforced as required by the Engineer of Record. The following are illustrations of slab penetration details as performed by others.