The materials estimate list puts materials takeoff list information
into a shorter form, adds an allowance for
waste and breakage, and makes an estimate of required quantities of material.
These materials include
nails, cement, concrete form lumber, tie wire, and temporary bracing or
scaffold lumber. (Table 3-2 is a
sample materials estimate list.)
The first step in preparing this list is to group (from the takeoff
list) all pieces of the same size and
length. For example, start with the largest size lumber that can be found
on the materials takeoff list.
Group all the pieces of that same size and length that appear on the list.
This groups the total number of
each size and length that will be needed. Continue in this way with each
size of lumber, working down
to the smallest size and length of material.
The sizes and pounds of nails needed should also he added to the list.
Two formulas used
for estimating the number of pounds of nails needed are shown below:
For each material size, a waste factor must be added. For flooring, sheathing,
and other 1-inch
material, add a waste allowance of 2 percent; for all other materials
2 inches and larger, add 10
percent to the total number.
Next, estimate the amount of additional requirements for materials (such
as bracing) that are not
shown on the plans. Add the total quantity for each size and length of
material. If it is used for
siding, sheathing, or flooring, convert it to board feet using the method
given in Chapter 2 (page 2-