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

252 Chapter Nine
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FIGURE 9-19
Connections for panel frames and corner panels.
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steel panel strap applied at each corner of a frame will give the frame
added strength, rigidity, and durability. Because the concrete pressure is
less at the top than at the bottom, the spacing of the studs may be increased
in the upper portion of a panel. However, as shown in Figure 9-18, it is
better to keep the spacing constant to prevent erection of the panels in a
reversed position, which could produce an unsafe installation.
Table 9-13 gives the maximum spacing of studs and form ties for
a 2- by 8-ft panel for various pressures using ¾-in.-thick Plyform
Class I sheathing, No. 2 grade Southern Pine 2 × 4 lumber for studs
and frames, and 3,000-lb form ties. The indicated number of nails is
Pressure, lb
per sq ft in.
Stud Spacing,
in.
Tie Spacing,
in.
300 18 48 3
350 17 48 3
400 16 45 3
450 15 40 4
500 14 36 4
550 13 32 4
600 12 30 4
Number of 20d
nails per joint
TABLE 9-13 Maximum Spacing of Studs and Form Ties for Figure 9-17
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