Some special structural slabs such as the one-way and the two­way joist slabs require the use of flange-type pan forms (Figure 2.7). Pans are usually nailed to supporting joists (soffits) or to sheathing. Pans nailed to sheathing are preferred because they make layout easier, the work area more efficient, and they are safer for those working on and below the deck. Pans are typically placed overlapping from 1 to 5 in. (25.4 to 127 mm). Pans are usually
stripped manually or by using compressed air applied to an adapter at the center of the dome.