PART B - BILL OF MATERIALS
Before any construction project is started, make out a BOMs to
requisition building materials. However, you should first make a
materials takeoff list and a materials estimate list, before making
out the BOM.
1-3. Materials Takeoff List. This list is the first step leading to
preparation of a BOM. It is a listing of all parts of the building,
taken off the plan. Table 13 shows a materials takeoff list for the
building substructure shown in Figure 120, page 124.
Sample materials takeoff list
1-4. Materials Estimate List. A materials estimate list puts
materials takeoff list information into a shorter form; adds
allowance for waste and breakage; and estimates quantities of
materials needed (Table 14, page 125). The lumber required is
listed by board feet (BF).
1-5. BF Compution. A BF is a unit measure representing an area of 1
foot by 1 foot, 1 inch thick. The number of board feet in a piece of
lumber can be computed using one of the following methods:
a. Rapid Estimate. You can estimate BF rapidly by using Table 1
5, page 125. For example, reading the table, you can see that if a
2inch by 12inch board is 16 feet long, your board feet would be 32.