600 8½ by 8½ 10 800 8½ by 13 10 1,000 8½ by 18 12 1,200 8½ by 18 12 1,400 13 by 13 12 1,600 13 by 13 15 1,800 13 by 18 15 2,000 13 by 18 15 2,200 13 by 18 15 2,400 18 by 18 18 2,600 18 by 18 18 2,800 18 by 18 18 3,000 18 by 18 18 [D] Based on a flue area equal to one-twelfth the fireplace opening. Sec table 2 for areas of flue lining. Number of Bricks (1) Estimate the total volume of masonry by multiplying together the length, width, and height of the various sections (fig. 39). _Length _Width _Height _Volume _Section_ Feet_ Feet_ Feet_ Cubic feet_ _AB_ 6.0 by 2.75 by 12.66 = 209.0 _BC_ 4.25 by 2.5 by 1.66 = 17.6 _CD_ 3.5 by 2.0 by 2.0 = 14.0 _DE_ 3.5 by 1.75 by 10.16 = 62.2 _EF_ 4.33 by 2.5 by 6.0 = 65.0 ------ Total volume including voids 367. 8 (2) Estimate the total volume of voids by multiplying together their length, width, and height. _Length _Width _Height _Volume _Item_ Feet_ Feet_ Feet_ Cubic feet_ Ash-pit 2.33 by 1.5 by 7.0 = 24 46 Fireplace 3.0 by 1.5 by 3.5 = 15.75 Smoke chamber 2.0 by 1.16 by 2.0 = 4.64 8½- by 13-inch flue[E] 0.78 square feet by 28 5 = 22.23 13- by 13-inch flue[E] 1.20 square feet by 18.75 = 22.50 8½- by 8½-inch flue[E] .50 square feet by 18.75 = 9.37 ------ Total volume of voids 98.95 [E] See table 2 for outside areas of flues in square feet. (3) Subtract volume of voids from volume of masonry. _Cubic feet_ Total volume, including voids 368 Total volume of voids 99 --- Total volume of masonry 269 (4) Multiply net volume of masonry by the number of brick per cubic foot. 269 by 22.5 = 6,053 brick, or 6.1 thousand bricks. Mortar To estimate the mortar needed, multiply the mortar material given below for 1,000 brick by 6.1 to determine how much will be needed to build the chimney, using 1:1:6 mixture recommended on page 10. Bags of hydrated lime 2.6 by 6.1 = 16 bags. Sacks of portland cement 3.5 by 6.1 = 22 sacks. Cubic feet of sand 18.0 by 6.1 = 110 cubic feet = 4 cubic yards. Foundation