Figure 2-17.Typical estimating work sheet.
Estimating Work Sheet
The estimating work sheet shown in figure 2-17,
when completed, shows the various individual
activities for a project with a listing of the required
material. Material scheduled for several activities or
uses is normally shown in the Remarks section. The
work sheet should also contain an activity
description, the item number, the material
description, the cost, the unit of issue, the waste
factors, the total quantities, and the remarks. The
estimating work sheets should be kept by the field
supervisor during construction to ensure the use of
the material as planned.
Material Takeoff Sheet
The material takeoff sheet (MTO) is shown in
figure 2-18. In addition to containing some of the
information on the estimating work sheet, the MTO
also contains the suggested vendors or sources, supply
status, and the required delivery date.
Bill of Material
The bill of material (BM) sheet (fig. 2-19) is
similar in content to the material takeoff sheet.
However, the information is presented in a format
suitable for data processing. Use this form for requests
of supply status, issue, or location of material and for
preparing purchase documents. When funding data is
added, use these sheets for drawing against existing
Between procurement and final installation,
construction material is subject to loss and waste.
This loss may occur during shipping, handling,
storage, or from the weather. Waste is inevitable
where material is subject to cutting or final fitting
before installation. Frequently, material, such as
lumber, conduit, or pipe, has a standard issue length
longer than required. More often than not, however,
the excess is too short for use and ends up as waste.
Waste and loss factors vary depending on the
individual item and should be checked against the
conversion and waste factors found in NAVFAC