=2.= In calculating the cubic yards of earth excavated for the cellar, all measurements are taken from the foundation plan and the sections. The plan is blocked out as shown in the accompanying Cellar Plan, and the area of each block found; then, by multiplying the sum of these partial areas by the depth of the cellar, the cubic contents is 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. CELLAR EXCAVATION SQUARE CUBIC _Quantities_ FEET FEET Block _A_, 23' 4" × 16' 4" 381.0 Block _B_, 14' 6" × 20' 10" 302.0 Deduct 4" × 3' 0" 1.0 Add for projection of wall, (13' 6" + 7') ÷ 2 × 3' = 30.8 ---- 331.8 Block _C_, 27' 6" × 17' 5" 479.0 Deduct for breaks in wall, 1' 7" × 6' 8" and 2' 6" × 3' 18.0 ---- 461.0 Block _D_, 26' 6" × 10' 5½" 277.2 Block _E_, 16' 8" × 11' 6½" 192.4 Deduct for breaks in wall, 6' 6" × 1' 11" and 3' × 5" 13.7 ----- 178.7 [2]Block _F_, 9' 10" × 9' 7½" ÷ 2 47.3 [3]Block _G_, 14' × 14' × .7854 ÷ 2 77.0 Deduct for portion of semicircular part, included in _F_, 12" × 14' approximately 14.0 ---- 63.0 ------- Total area of excavation 1,740.0 Contents, 1,740 sq. ft. × 6.5 ft. (depth) 11,311.0 [2] The block _F_ is taken as a triangle. The block _G_ is a semicircle, and its area is found, as will be noticed, by finding the area of a circle and dividing it by 2. [3] The block _F_ is taken as a triangle. The block _G_ is a semicircle, and its area is found, as will be noticed, by finding the area of a circle and dividing it by 2.