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

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Forms for Walls 263
plywood is erected and nailed to the 2 × 4 plates and temporarily
held in position by the Jahn ply holder. The vertical joints should be
tight. Figure 9-28 shows the initial assembly of the forming system.
Figure 9-29 illustrates the proper installation of the Jahn bracket.
After one face of plywood is installed, two workers can easily install
the snap ties: one installs the ties and the other puts on the Jahn “A”
bracket. Working from top to bottom, wales are installed in the bracket
and securely tightened. Wale joints should occur at the bracket, or a scab
should be installed at the wale joint with Jahn “C” brackets. A check
should be made to ensure that plywood panels are plumb and aligned.
Erection of the inside wall panel, or second wall panel, is the same
as for the outside panel, except that these plywood panels are placed
over the snap tie ends. As illustrated in Figure 9-30, this can best be
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FIGURE 9-28
Corporation)
Initial assembly of Jahn forming system. (Source: Dayton Superior
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