GLAZIERS' WORK BY THE FOOT. IF the windows be square, multiply the length by the breadth, the same as in board measure : Note-If the windows are arched, or have a curved form, no aliowance is made on account of the extraordinary trouble, waste, &c. The length is taken from the highest part of the arch down to the bottom. EXAMPLES. 1. If a window be 4 feet 5 inches in length, or height, and 2 feet 9 inches in breadth, How many square feet does it contain} Ans. 12 feet, 1 in. 9 sec. 2. There is a house with 3 tiers of windows, and 4 windows in a tier; the height of the first tier is 6ft. 8' of the second 5ft. 94% of the third 4ft. 6'; and the breadth of each is 3ft. 5': How many square feet in the whole ? Ans. 173 ft. 4' 9!! ft. 6 8 5 9 ft. CARPENTERS' WORK. To know how many boards it will take to cover a frame. RULE. 1. For the body of the frame. Add the length and breadth of the frame together, and then double the sum, or multiply by 2; then multiply that product by the height, and it will give the content. 2. For the gable ends. Multiply the height of one gable end by its bread, and it will give the content of both. 3. For the roof. Multiply the length of both rafters, added together, by the length of the frame, and it will give the content. EXAMPLE. How many boards will cover a barn that is 50 feet long, and 30 feet wide; and the height of the gable ends 13 feet, and 11fters 20 feet each; and the body of the frame 15 feet in height? 50 ft length. Gable end 13 ft. height. 30 ft. breadth. 4790 2000 f. for the roof. Ans. 4790 feet: Note. The rafters are, generally, two thirds of the breadth of the frame in length. To know how many shingles it will take to cover a roof. RULE. Multiply the length of both ratters, added together, by the length of the building, and that product by 144, and it will give the content of the roof in square inches: Then multiply the width of a shingle by the breadth of the course for a divisor; by which divide the content of the roof, and it will give the number of shingles. EXAMPLE. How many shingles will cover a barn 50 feet long, and 20 feet rafters, allowing each shingle to be 4 inches wide, and each course 5 inches? 288000 sq. in. in the roof. Note. In measuring roofs, no deduction is made for sky-lights, chimney-shafts, &c. In measuring flooring, from the content of the whole floor in feet, take the content of the vacancies for the stairs, hearths, &c. in feet, and the remainder is the content. To know the contents of the ceiling of a room, multiply the number of feet round the room by the height; from which subtract the doors and windows, and the remainder will be the content. * WOOD AND TIMBER MEASURE: To measure wood. 128 feet make a cord of wood, or bark; that is, 4 feet high, 4 feet wide, and 8 feet long. RULE. Multiply the length by the breadth, and that product by the height, and divide the last product by 128, and it will give the number of cords. EXAMPLES. 1. If a load of wood be 8 feet 4 inches long, 3 feet 8 inches wide, and 4 feet 6 inches high, How many cubic feet does it contain, and how many cords ! ft. 8 4 length. 3 8 breadth 137 6 0 0 cubic feet. swer. 2. If a load of wood be 8 feet long, 4 feet wide, and 2 feet 6 inches high, How many cubic feet, and feet representing parts of a cord? 3. How many cubic feet, cords, and feet representing parts of a eord, are there in a load of wood, 9 feet 4 inches long, 3 feet 8 inches wide, and 4 feet 9 inches high? ft. 3 8 28 0 6 2 8 34 2 8 4 9 16 cubic feet. 4. How many cubic feet, cords, and feet representing parts of a cord, are there in a load of wood 9 feet long, 3 feet 5 inches high, and 4 feet 3 inches wide? Answers. 130 ft. 81 311 cubic feet, To find the contents of a round stick of timber of equal bigness from end to end. Find the area at one end, by multiplying half the circumference by half the diameter; multiply that by the length, and divide the last product by 144, it will give the contents. Note-To find the circumference of a circle, say, as 7: is to 22 so is the given diameter: to the circumference. EXAMPLES. 1. How many solid feet are there in a round stick of timber of equal bigness from end to end, whose diameter is 14 inches, and length 20-feet? 56=1. 2. How many solid feet are there in a round stick of timber, of equal bigness from end to end, whose diameter is 20 in ches, and length 30 feet? As 7: 22: 20,5: 64,42-circum. 32,21 half circum. 10,25 half diam. 30-length. 330,1525 144)9904,5750(68,781 feet Ans. To find the solid contents of a tapering stick of timber, whether square or round, when one end is a point. RULE. Multiply the area of the great end, by one third of the length. 1. How many solid feet in a tapering round stick of timber, 21 feet long, 28 inches diameter at one end, and a point at the other? As 7: 22 :: 28: 88 cir. 44-circum. 616 area at one end. = x) of the length. 144)4312(29,94 feet. Ans 2. How many solid feet are there in a tapering square stick of timber, 30 feet long, 12 inches square at one end, and a point at the other? |