To develop column 6, try a l0-foot length.
13.
2'-4" = length of brace stake (fig. 4-5) converting to inches:
10'-0" = 10 x 12 = 120 inches
2'-4" = (2 x 12) + 4 = 28 inches
120 / 28 = 4 pieces, with 8" waste
Continued calculations will show that a 12-footer will supply 5 pieces with only 4 inches waste, but since
only 4 pieces are required the waste would be 2'-8". Therefore, the 10-foot standard length is selected (para
4-5c, 4-6, fig. 4-5).
Four pieces can be cut from a ten foot standard length, so 4 is the correct entry for column 7 of the take-off-
14.
list (para 4-5c, 4-6, fig. 4-5).
The number of standard lengths required, the entry for column 8, is developed by dividing the figure in
15.
column 3 (number of pieces) by the figure in column 7 (number of pieces per standard length) (para 4-6b(2)).
Note that item 7 (nominal size 2 x 6) is not identical with any other item, therefore cannot be consolidated
16.
with any other (para 4-7b(3))
When items 2, 4, 5, and 6 are consolidated, the total number of 3-foot pieces becomes nine. Calculations
17.
shown in paragraph 4-6c(2)) indicate that there is less waste in obtaining nine 3-foot pieces from 10-foot
lengths than from 8-foot lengths (para 4-6c(2)).
From table 4-1, a 10% waste allowance is included for dimension lumber two or more inches thick (para 4-8,
18.
table 4-1).
Since 20 pounds of 8-penny nails are required for 1000 square feet of sheathing, then:
19.
1500 = 1.5 MBF
1.5 x 20 = 30 lbs required (para 4-9f).
Grouping and arranging results in a completed bill of materials which facilitates requisitioning (para 4-10).
20.
4A-2
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