ANALYSIS OF COST FACTORS PER 1000 BRICKS, CEMENT MORTAR 1:3
| Brick, 1000 @ ............................ | |
| Portland cement, 1¼ bbl. @................ | |
| Sand ½ cu. yd. @ ......................... | |
| Mason, 10 hrs. @ ......................... | |
| Tender, 10 hrs. @ ........................ | |
| Total | $ |
Chimneys.—One foot of chimney height will contain five courses of ordinary bricks.
CHIMNEYS
| No. Flues | Size of Flue | Size of Chimney | No. Bricks per Ft. |
| 1 | 8" × 8" | 16" × 16" | 30 |
| 2 | 8" × 8" | 16" × 28" | 50 |
| 3 | 8" × 8" | 16" × 40" | 70 |
| 1 | 12" × 12" | 20" × 20" | 40 |
Slate Roof.—Exposure of each slate will equal the length of a slate diminished by 3" (the usual amount of lap) divided by 2, multiplied by the width of the slate.
To determine the number of slates required, divide the area to be covered by the exposure of each slate as determined just above.
Example—Determine the number of 6" × 12" slates required to
cover a surface 16' × 20'.
Solution—( (12" - 3") / 2) × 6" = 27 sq. in.
(16 × 20 × 144") / 27" = 1707 slates.
TABLE OF SLATES PER SQUARE OF 100 FEET
| Size | Length of Expos. | No. Req. | Nails Req |
| 6" × 12" | 4½" | 533 | 3.8 lbs. |
| 7" × 14" | 5½" | 377 | 2.66 |
| 8" × 16" | 6½" | 277 | 2 |
| 9" × 18" | 7½" | 214 | 1.5 |