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

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Forms for Walls 245
FIGURE 9-11
Forms for wall of circular tank, 30 ft or more in diameter.
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vertically. Horizontal and inclined radial braces, spaced 6 to 8 ft apart,
should be installed to secure the inside form in position.
The inside form should be erected first, complete with wales and
braces. Form ties are installed along each wale adjacent to each stud.
Because of the low strength of the flat wales, ties must be installed
adjacent to, instead of between, the studs. The outside form is then
erected, and the tie holders are secured against the wales.
Figure 9-12 illustrates the method of constructing forms for a
circular tank whose diameter is less than 30 ft. Vertical planks, usually
FIGURE 9-12
Forms for wall of circular tank, less than 30 ft in diameter.
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