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

366 Chapter Twelve
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FIGURE 12-1 Typical cross sections of Flangeforms; all dimensions are
outside to outside. (Source: Ceco Concrete Construction)
FIGURE 12-2 Installation of concrete floors using Flangeforms; typical arrangement
of centering. (Source: Ceco Concrete Construction)
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3. The widths of the joists may be varied without changing the
sizes of the joist soffits, thus reducing the quantity of form
lumber required.
4. By modifying the widths of the joists, the forms may be used
for floors with odd dimensions.
Adjustable Steel Forms
As illustrated in Figure 12-3, flangeless types of steel forms are available
for use in construction pan-joist types of floor systems. The forms
are available in a 20- and 30-in. standard, and a 30- and 40-in. deepset.
Figure 12-3 only shows the standard and the 40-in. deepset forms.
The dimensions given in the figure are representative of the sizes
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