1.

Available materials: 1- by 6-inch S46

4- by 4-inch S4S

2.

Determine loads: Assume a live load is 50 lb/sf. The dead load is 150 lb/cf.

DL

= 150 (1/2-foot) = 75 psf

LL

= 50 lb/sf

TL

= DL + LL = 125 psf

3.

Go to Table 3-1 on page 3-6 for 1- by 6-inch sheathing for maximum concrete pressure of 125 psf.

Maximum joist spacing is 26 inches.

4.

Uniform load on the joists:

5.

Determine maximum stringer spacing using Table 3-3, page 3-9: 55 inches

6.

Calculate the uniform load on the stringer (ULSstr).

7.

Determine the maximum shore spacing.

From Table 3-3, with a uniform load of 573 lb/ft to 600 lb/ft, the spacing is 37 inches.

Evaluate the maximum shore spacing based on the shore strength. Find supported strength.

10' - 3/4" - 3 1/2" - 3 1/2" = 9' 4 1/2" to the nearest whole number is 10 feet

Allowable load according to Table 3-7 on page 3-21 for the unsupported length of 10 feet is 3,400 (using 4- by 4-

inch S4S).

Evaluate the maximum allowable load based on end-bearing area. (Since the C is unknown, use the lowest

value provided in Table 3-8 on page 3-22.)

Select the allowable load on the shore. (Compare and select the lower.)

Select the most critical spacing which would be 37 inches from using the information above.

Integrated Publishing, Inc.
6230 Stone Rd, Unit Q
Port Richey, FL 34668
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