STONEWORK
3. The foundation walls are built of rubble masonry to the sill at the grade line, and from this sill to the water-table they are built of ashlar with rubble backing, except those portions behind porches and steps, which are wholly rubble. The estimate for stonework also includes the concrete for footings and cellar floor; the number of cubic feet of concrete required for the footings will be found by referring to the item Excavation for Wall Footings.
Rubble Masonry
| Cubic Feet | ||
|---|---|---|
| Quantities[6] | ||
| Cellar walls, 181' 2" × 1' 6" × 6' 6" | 1,766.4 | |
| Add for extra thickness over 1' 6": | ||
| 5" × 6' 3" × 6' 6" | 16.9 | |
| 1' 2" × 10' 8" × 6' 6" | 80.9 | 97.8 |
| [7]Foundation walls for front porch: | ||
| 74' 6" × 1' 8" × 1' 9" | 217.3 | |
| 74' 6" × 1' 2" × 9" | 65.2 | 282.5 |
| Foundation for steps: | ||
| 2 piers, 1' 6" × 1' 8" × 2' 6" | 12.5 | |
| 2 piers, 2' x 1' 6" × 2' 6" | 15.0 | 27.5 |
| Stone footings under porch foundations, | ||
| 74' 6" × 2' 3" × 6" | 83.8 | |
| Backing for ashlar and water-table, | ||
| 79' 10" × 1' (average) × 3' | 239.5 | |
| Rubble wall behind porches, | ||
| 101' 4" × 1' 6" × 3' (approximately) | 456.0 | |
| [8]Foundation walls, rear porch, | ||
| 26' 10" × 1' 6" × 2' 6" | 100.6 | |
| Footings, walls rear porch, 26' 10" × 2' 4" × 6" | 31.3 | |
| Area walls, 13' 9" × 1' × 6' 6" | 89.4 | |
| Stone footing for area walls, 13' 9" × 1' 9" × 6" | 12.0 | |
| Piers, 1' 6" × 1' 6" × 2' 6" × 2 | 11.3 | |
| Pier footings, 2' × 2' × 6" × 4 | 8.0 | |
| Pier footings, 2' × 1' 9" × 6" × 2 | 3.5 | |
| Total rubble masonry | 3,209.2 |
Cost
The cost of the rubble masonry based on the analysis given in Estimating and Calculating Quantities, Part 1, using 1-3 Portland cement mortar, is $5.23 per perch.
Summary
From the foregoing calculation, the quantity of rubble masonry is 3,209.2 cu. ft. Taking 25 cu. ft. to 1 perch, 3,209.2 ÷ 25 = 128.4 perches, which at $5.23 per perch makes the total cost of rubble masonry $671.53.
Ashlar[9]
| Square Feet | |
|---|---|
| Quantities | |
| Facing for cellar walls, 79' 10" × 2' 2" | 173.0 |
| Porch piers, 29' 6" × 1' 6" | 43.9 |
| Total ashlar | 216.9 |
Cost
The estimated cost of ashlar is based on the following analysis of the cost of 1 square foot of ashlar:
| Cost of stone, bluestone facing | $.40 |
| Hauling stone | .03 |
| Mortar | .01 |
| Labor, estimating 64 square feet per day of 8 hours, | |
| for two masons and one laborer: | |
| Two masons, at $3.20 per day | .10 |
| One laborer at $2 per day | .03 |
| Cost per square foot | $.57 |
Summary
From the foregoing quantities, the ashlar amounts to 216.9 square feet, which, at 57 cents per square foot, will make the total cost of ashlar $123.63.
Cut Stone
Concrete Footings and Floor
| Quantities | Cubic Yard | |
| Footings, as per Excavation for Wall Footings, | ||
| 535.9 cu. ft. ÷ 27 | 19.8 | |
| Square Feet | Square Yard | |
| Concrete floor: | ||
| Area of cellar excavation | 1,740.0 | |
| Deduct area of footings | 643.3 | |
| 1,096.7 | ||
| Add for 6-inch strip over inner projection | ||
| of wall footings, 165' × 6" | 82.5 | |
| Add for projection on both sides of interior | ||
| walls, 126' × 6" | 63.0 | |
| Add for projection over chimney footing, | ||
| 33' × 6" | 16.5 | |
| Total area of concrete floor | 1,258.7 | = 139.9 |
Cost
The estimate for concrete footings is based on the analyses of costs given in Estimating and Calculating Quantities, Part 1, and is $5.10 per cubic yard for a 1-3-5 mixture.
The estimate for the concrete floor is arrived at as follows:
The concrete will be a 1-3-6 mixture. According to Estimating and Calculating Quantities, Part 1, this mixture costs $4.92 per cubic yard. According to the same section, 25 cents must be added to this cost for extra labor, bringing the total up to $5.17 per cubic yard. If the concrete floor is 4 inches thick, the cost per square yard will be ⁴/₃₆ × 5.17 = 57 cents, approximately. The top coat, according to Estimating and Calculating Quantities, Part 1, is 40 cents. Therefore, the total cost of the concrete floor per square yard is 57 + 40 = 97 cents.
Summary
| Footing concrete, as per foregoing figures, | |
| 19.8 cu. yd. at $5.10 per cubic yard | $100.98 |
| Concrete floor, 139.9 sq. yd. | |
| at 97 cents per square yard | 135.70 |
| Total cost of concrete | $236.68 |
| Recapitulation of Cost of Stonework | |
| Rubble masonry | $ 671.53 |
| Ashlar masonry | 123.63 |
| Cut stone | 761.99 |
| Concrete footings and floor | 236.68 |
| Total cost of stonework | $1,793.83 |