Estimating in Building Construction

Doors and Windows 195

Review Questions

1. Determine the window and/or curtain wall and door
   materials required for the building in Appendix C. Use
   workup sheets and sketches.


2. What accessories should be checked for when taking off
   windows and curtain wall?


3. Define glazing. Why must the estimator determine who
   will perform the required glazing?


4. What information is required to price a door?


5. Describe the advantages in prefitting and prefinishing
   doors.
   6. Determine the door and hardware requirements for the
   building in Appendix C.
   7. Why should the type of finish required on the door and
   door frames be noted on the workup sheet?
   8. Describe briefly the ways hardware may be handled on a
   project.
   9. What precautions must an estimator take when using an
   allowance, from the specifications, in the estimate?


6. What is the unit of measure for glass, and why should
   the various types and sizes required be listed separately?


7. Determine the window and door materials required for
   the residence in Appendix B.

Plate glass is available in thicknesses of 3/16 to 1^1 ⁄ 4 inches
and as polished plate glass, heavy-duty polished plate glass,
rough, or polished plate glass. The more common types are
regular, grey, bronze, heat absorbing, and tempered.
Wire glass is available with patterned and polished fin-
ishes, and with various designs of the wire itself. The most
common thickness is 1/4 inch, and it is also available in col-
ors. This type of glass is used when fire-retardant and safety
characteristics (breakage) may be required.
Patterned glass, used primarily for decoration, is available
primarily in 7/32- and 1/8-inch thicknesses. Pattern glass pro-
vides a degree of privacy, yet allows diffused light into the space.
Other types of glass available include a structural-
strength glass shaped like a channel and tempered, sound

control, laminated, insulating, heat- and glare-reducing, col-

ored, and bullet-resisting glass.

The frame may be single glazed (one sheet of glass) or

double glazed (two sheets of glass) for increased sound and

heat insulation. If the specifications call for double glazed,

twice as many square feet of glass will be required.

Glass is estimated by the square foot with sizes taken

from the working drawings. Because different frames may

require various types of glass throughout the project, special

care must be taken to keep each type separate. Also to be

carefully checked is which frames need glazing, since many

windows and doors come with the glazing work already

completed. The types of setting blocks and glazing com-

pound required should be noted as well.