Estimating the Excavation Work
Description
This section is from the book "A Treatise On Architecture And Building Construction Vol4: Plumbing And Gas-Fitting, Heating And Ventilation, Painting And Decorating, Estimating And Calculating Quantities", by The Colliery Engineer Co. Also available from Amazon: A Treatise On Architecture And Building Construction.
Estimating the Excavation Work
64. In calculating the number of cubic yards of earth to be excavated for the cellar, all the measurements are taken from the foundation plan and the sections. The method pursued in making calculations is as follows: The plan is blocked out as shown in the accompanying "Cellar Plan," and the area of each block is determined; then, by multiplying the sum of these partial areas by the depth of the cellar, the cubic contents are determined. The trenches for the foundation walls of porches and for the footings of cellar walls are calculated separately, as also are the excavations for piers, drains, cesspools, area, etc.
Quantities
Cellar Excavation.
Sq. Ft. | Cu. Ft. | ||
Block A, 23' 4" X 16' 4"......... | 381.0 | ||
Block B, 14' 6" X20' 10".......... | 302.0 | ||
Add for projection of wall, | |||
13'+7'/2 X3'=.............. | 30.0 | 332.0 | |
Block C, 27' 6" X 17' 5"..... | 479.0 | ||
Deduct for breaks in wall, | |||
1'7"X6' 8" and 2'6" X 3'.. | 18.0 | 4G1.0 | |
Block D,26' 6" X10' 5 1/2"........ | 277.2 | ||
Block E, 16' 8" X11' 6 1/2"..... | 192.4 | ||
Deduct for breaks in wall, | |||
6'6'X l' 11" and 3' X 5".. | 13.7 | 178.7 | |
Block F, 9' 10" X 9' 7 1/2"÷ 2....... | 47.3 | ||
Block G, 14' X 14' X .7854÷ 2... | 77.0 | ||
Deduct for portion of semicircular part, included in F, | |||
12"X 14'......... | 14.0 | 63.0 | |
Total area of excavation.............. | 1,740.2 | ||
Contents, 1,740.2 sq. ft. X 0.5 ft. (depth) | 11,311.3 | ||
Excavation for Wall Footings. Lengths scaled along center line of walls:
Sq. Ft. | Cu. Ft. | |
a b, 26' x 2'6"............. | 65.0 | |
b c, 5' 6"x3'.............. | 16.5 | |
cd, 9' 9" x 2' 6"............ | 24.4 | |
d e, 17' 6" X 2' 6"............ | 43.7 | |
e f, 26 '4" x 2' 6"............ | 65.8 | |
f g 9' x 3' 8"............. | 33.0 | |
g h, 19' 9" x 2' 6"............ | 49.4 | |
i j, 27' 7" X 2' 6"............ | 69.0 | |
j a, 31' x 2' 6"............. | 77.5 | |
k I (less openings), 18' 9" X 2' 6"..... | 46.9 | |
Chimney, 12' 6"x 4' (approximately) 50 Deductions........................10.4 | ||
39.6 | ||
m n (less openings), 7' 9" X 2' 6"..... | 19.4 | |
o p,19' 6"x l' 9"............ | 34.1 | |
Total area of excavation for footings . | 584.3 | |
Contents, 584.3 sq. ft. X 10 in. (.833 ft.) depth................... | ||
486.7 |
Miscellaneous Excavations. Lengths scaled along center line of walls:
Cu. Ft. | |
Front porch, 69' 9"x 2' 3"x3'.......... | 470.8 |
Back porch, 24' 6" X 2' X 3'............ | 147.0 |
Piers for steps, 1' 9" X 2' X 3' X 4......... | 42.0 |
Piers for kitchen porch, 2'x2'x3'x2...... | 24.0 |
Cellar area, 5'9"x 6' x 6' 6"........ 224.2 | |
Deduct 1'9" X 3' X 6' 6"........ 34.1 | 190.1 |
Dry cesspool, 6ft. diameter X 6 ft. depth................. | 169.6 |
Cesspool, 6 ft. diameter X 8 ft. depth....... | 226.2 |
Trench for pipe to cesspool, 25' X 7' 6" X 2'.... | 375.0 |
Trench for drain pipes (roof drainage), 228' X 3' X 1' | 684.0 |
Trench for drain pipes from junction to dry cesspool, 20' X 3' X 18"............. | |
90.0 | |
Total.................. | 2,418.7 |
Grand total of excavation............. | 14,216.7 |
Filling.
Cu. Ft. | |
Around foundation walls, 178' 6" X 6" X 6' 6"... | 594.8 |
Around foundation of porches, 102' X 6* X 3'... | 153.0 |
Total filling............... | 747.8 |
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