Deduct for three openings, 12' 3" total width × 6' 6" height = 79.6 sq. ft. at 30 brick per square foot 2,388 ----- 4,413 Interior wall, 8½" thick, 43' 9" × 8', 350 sq. ft. at 15 brick per square foot 5,250 Chimney, principal (flues figured solid), approximately 920 cu. ft., at 22½ brick per cubic foot 20,700 Chimney, rear, approximately 245 cu. ft., at 22½ brick per cubic foot 5,513 Trap pits, 46 sq. ft., at 7½ brick per square foot 345 ------ 46,303 Add 5 per cent. for waste 2,315 ------ Total common brick 48,618 _Cost_ The cost of the common brickwork is based on the analysis given in _Estimating and Calculating Quantities_, Part 1, and is $16.68 per thousand for lime-cement mortar. _Summary_ According to the estimate of quantities, the number of common brick laid is 46,303, which, at $16.68, will cost $ 772.33 Common bricks, not laid, 2,315, at $8 18.52 Molded brick and terra-cotta cap for rear chimney 10.00 -------- Total cost of common brickwork $ 800.85 _Recapitulation of Cost of Brickwork_ Pressed brickwork $ 278.31 Common brickwork 800.85 --------- Total cost of brickwork $1,079.16 CARPENTRY =5.= In estimating carpentry work, it is advisable to make a tabulated list of the various sizes of joists, rafters, etc., giving the number and dimensions of each size. In this way, any error in calculation or change in price can be corrected with little difficulty. As house-framing timbers and boards are sold at the yards in even lengths, as 10 feet, 12 feet, 14 feet, etc., uneven, or odd, measurements must be figured in even lengths from which they can be cut. Thus, if a stick 14 feet 7 inches in length is required, a 16-foot stick must be ordered.