8.

Shore bracing check:

= the unsupported length (in) where 1 = 120" since 120" - 3/4" - 3 1/2" - 3 1/2" = 112 1/4"

d = is the least dimension of the shore. Since the lumber is a 4- by 4-inch S45 member, the least dimension (d)

is d = 3 1/2 inches

Lateral bracing is not required.

9.

Summary:

Sheathing:

1-inch- boards (S4S)

Joists:

4- by 4-inch (S4S) at 26 inches OC

Stringers:

4- by 4-inch (S4S) at 55 inches OC

Shores:

4- by 4-inch (S4S) at 37 inches OC

4-inch, is 3/4-inch). The nominal thickness of a 4-inch by piece of lumber (for example, 4- by 1-inch, 4- by 2-

inch, 4- by 3-inch, is 3 1/2 inches). Consult FM 5-34 for the nominal or actual dimensions of lumber.

Materials:

1-inch board sheathing

2- by 4-inch yokes

Column height: 15 feet

Largest cross-sectional dimension: 28 inches

Yoke spacings: From the bottom up (in inches): 8, 8, 8, 9, 9, 9, 10, 12, 13, 15, 18, 20, 21, 20. The last spacing,

20 inches, was determined by subtracting all the previous spacings from the total height of the column, in inches

(180 inches - 160 inches = 20 inches).

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