| $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.
Cost of a 2' 8" × 6' 8" Door Frame in Place
| 17 linear feet of ⁵/₄" × 6" rabbeted jambs | $ .83 |
| 36 linear feet of 1" × 5" casing | 1.17 |
| 36 linear feet of 1" × 2" back band | .47 |
| Dadoing and smoothing jambs and casing, | |
| 1 hour, at 40 cents per hour | .40 |
| Nails | .05 |
| Setting up jambs and casing,, | |
| 3 hours at 40 cents per hour | 1.20 |
| Total | $4.12 |
The area of the door is 2 ft. 8 in. × 6 ft. 8 in. = 17.78 square feet. Therefore, the cost of the preceding door frame per square foot of door is $4.12 ÷ 17.78 = 23 cents.
87. The following estimate gives the cost of a door of moderate price. The size of this door is 2 ft. 8 in. × 6 ft. 8 in. × ⁶/₄ in. It has four panels, is made of No. 1 pine, and is finished with solid ogee molding.