LESSON 4
ANSWERS TO SELF TEST
Good estimating helps to insure completion of projects on time and the economical use of men, materials, and
1.
equipment (para 4-1a).
The first thing an estimator should do is to become thoroughly familiar with the project by studying the plans
2.
and specifications and the work site itself (para 4-1b(1)).
Information for preparing the bill of materials is obtained from drawings and specifications (para 4-1b(3)).
3.
If plans are altered or modified, the materials estimator will have to make the required additions and deletions
4.
to the accompanying bills (para 4-3a).
No matter what system is used in the preparation of a bill of materials, the following five elements are
5.
essential (para 4-4a).
Take-off list
a.
b.
Waste allowance
c.
Nail requirements
d.
Grouping and arranging
e.
Parts are always listed separately unless size and nomenclature are identical (para 4-5b(1)).
6.
When determining the number of pieces of standard length lumber required, the materials estimator must
7.
determine the standard length that will produce the most parts with the least waste (para 4-5b(3)).
In column 3 enter 6 (number of pieces) and in column 5 enter 8'10" (length in place) (para 4-5c, 4-6, fig. 4-5).
8.
Nominal size of skirtboards is 1" x 6" which is entered in column 4 (para 4-5c, 4-6, fig. 4-5).
9.
In column 4 enter 1" x 6" (nominal size) and in column 5 enter 4'10" (length in place) (para 4-5c, 4-6, fig. 4-
10.
5).
The shortest standard length which supplies the most pieces with the least waste is normally chosen (para 4-
11.
6b(1)).
From the floor plan in figure 4-5 it is determined that the length in place of the 1 x 6's is 9'2". A standard 10-
12.
footer would have 10" of waste. Any other standard length would have more waste except a 20-footer which
would provide 2 pieces and have 20" waste. Therefore, by the rule cited in exercise 11, a standard 10-footer
would be chosen (para 4-5c, 4-6, fig. 4-5).
4A-1
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