Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

378 Chapter Twelve
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FIGURE 12-17 Additional methods of supporting horizontal shores on steel
frame construction. (Source: Patent Construction Systems)
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Figure 12-17 illustrates another method of supporting horizontal
shores on steel frame construction. Figure 12-17(a) is a Spanall bearing
on a 4 × 6 ledger that is hung from a steel hanger over the structural
steel beam. The plywood is placed directly on top of the horizontal
shores. Figure 12-17(b) is a Spanall bearing on a 4 × 6 ledger hung from
a steel hanger over a structural steel beam. The plywood is placed on
joists that rest on the horizontal shores.
Figure 12-18 illustrates methods of using horizontal shores with
forms for a flat slab with drophead construction. Figure 12-18(a) is a
typical cross section showing the Spanall and joists supporting the
dropheads on the lower ledger while the upper ledger supports the
Spanall. The plywood is placed directly on the horizontal shoring.
FIGURE 12-18 Methods of using horizontal shores with forms for fl at-slab
with drophead construction. (Source: Patent Construction Systems)
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