h = The overall height (feet) of the wall form.
y = The point of application of the brace on the wall form, measured in ft from the base of the form.
θ = The angle, in degrees, that the brace makes with the horizontal. For best effect, 0 should be between 20 and
J = A factor to be applied which includes all constant values (material properties and assumed wind force). It is
measured in ft4. See Table 3-6.
Table 3-6. J factors.
Smax = The maximum safe spacing of braces (feet), center to center, to support the walls against external forces.
cos =- Cosine; the ratio of the distance from the stake to the wall divided by the length of the brace
sin = Sine; the ratio "y" vided by LB.
The design procedure can best be explained by an example problem.
Example Problem: Determine the spacing of bracing for a wall 10 feet high. Use 2- by 6-inch by 10-foot
material attached 6 feet from the bottom to the top of the form.
Select material = given 2- by 6-inch by 10 foot (uncut)
J = 3,710 ft4 (from Table 3-6)
Lmax = 6 1/4 feet (because of 2-inch material)
LB = 10 feet