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

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Design of Wood Members for Formwork 147
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The geometric properties can be calculated as follows:
x = 6-ft
y = 10-ft
z = x + y
2 2
= () 6 + ( 10)
= 11.67 ft
2 2
The forces and reactions of the bracing can be calculated as follows:
Applied horizontal load = (125 lb per lin ft)(9 ft)
Axial force in brace = H(z/x)
= 1,125 lb
= (1,125 lb)(11.67/6)
= 2,188 lb
Vertical reaction at bottom of brace = H(y/x)
= (1,125 lb)(10/6)
= 1,875 lb
Horizontal reaction at bottom of brace = H
= 1,125 lb
The axial compression load in the brace is 2,188-lb and the
unbraced length is 11.67 ft. Table 5-5 shows many wood members are
adequate to resist this load. Each brace must be securely attached at
the top and bottom.
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