$4.60 × 144
----------- = 43 cents
2 × 28 × 28
=85.= The cost of an ordinary window with two 28" × 28" lights may be
estimated as follows:
COST OF SASH IN PLACE
Cost of two sash, ⁶/₄, double-hung, glazed with
single-thick American glass $2.10
Sash weights, 30 pounds, at 2 cents per pound .60
Cord, 22½ feet, at 1 cent per foot .23
Two sash lifts, at 5 cents each .10
Sash lock .15
Setting and hanging sash .35
-----
Total $3.53
If double American instead of single American glass is used, the cost
just given should be increased by $1.
If the sash is glazed with single American glass, the cost per square
foot of light will be
$3.53 × 144
----------- = 33 cents.
2 × 28 × 28
Therefore, the total cost of window and frame in place is 43 + 33 =
76 cents per square foot. If the sash is glazed with double American
glass, the cost per square foot of light will be
$4.53 × 144
----------- = 42 cents.
2 × 28 × 28
Therefore, in this case the total cost of window and frame will be 43 +
42 = 85 cents per square foot.
For curved sash in curved walls, the cost is about twice as much as
that of straight work.
=86. Cost of Door Frames and Doors.=—The following estimate represents
the cost of an ordinary door frame. All molded work is put in the
estimate at 1 cent per square inch of section per foot of length less
35-per-cent. discount, which is the same thing as ⁶⁵/₁₀₀ cent per
square inch of section per foot.