Plastering is estimated by the square yard. In some localities it is not customary to make any deduction for windows, doors, etc., while in others as much as one half is sometimes allowed for openings. In estimating materials, allowance is made for openings. 1. How many bundles of laths will cover a ceiling 36 ft. long and 18 ft. wide? OPERATION (36 × 18) ÷ 9 = 72, sq. yd. in ceiling. 72 ÷ 6 = 12, no. bundles Ans. There are 72 sq. yd. in the ceiling. Since one bundle will cover 6 sq. yd. there will be needed as many bundles as 6 is contained times in 72, or 12. 2. How many bundles of laths will be required to cover the walls and ceiling of a room 45 ft. long, 27 ft. wide, and 18 ft. high, allowing 200 square feet for windows and doors? 3. How many bundles of laths will be needed for a room 63 ft. long, 45 ft. wide, 18 ft. high, deducting 4 doors 12 ft. by 6 ft. and 8 windows 10 ft. by 4 ft. ? 4. Find the cost of lathing and plastering both sides of a partition 36 ft. long and 18 ft. high, if the laths cost 25¢ a bundle, and the plastering 18¢ a square yard. 5. In Ex. 3, find the cost of lathing and plastering, if the laths cost 22¢ a bundle, and the plastering 18¢ a square yard, making no allowance for windows and doors in plastering. LESSON 75 Painting and Kalsomining are usually estimated by the square foot or square yard. The wall paper commonly used is 18 in. wide, and is put up in single rolls 24 ft. long, or in double rolls 48 ft. long. The exact cost of the paper required for a room can be ascertained only by counting the number of rolls actually used, reckoning any part of a roll used as a whole one, after the work has been completed. In making estimates, paper hangers ascertain the approximate number of rolls that will be required by dividing the exact number of square feet to be covered by the number of square feet in a double roll. 1. How much will it cost to whiten the ceiling and walls of a schoolroom 24 ft. wide, 36 ft. long, and 14 ft. high, at 5¢ a square yard, deducting 20 sq. yd. for openings? 2. How many double rolls of paper would it take to cover the ceiling and walls of the room described in Ex. 1? No allowance for openings. SUGGESTION. Divide the number of square feet to be covered by the number of square feet in a double roll. G H A B 3. This drawing represents a frame house. AB=18 ft.; BC 36 ft.; AD 24 ft.; EF 9 ft.; GH=38 ft.; = = = 4. At 3 a square foot, how much will it cost to paint. the roof? 5. How much will it cost to paint the two gables at 21 a square foot? 6. How much will it cost to paint the two sides and two ends (not including the gables) at 121 a square yard, making no allowance for windows and doors? LESSON 76 1. How many double rolls of paper will be needed to cover the ceiling and walls of a room 16 ft. by 12 ft. and 9 ft. high, deducting 3 windows each 3 ft. by 6 ft., and 1 door 21 ft. by 63 ft.? 2. At 22 a square yard, how much will it cost to plaster the ceiling and walls of the room described in the preceding example? No allowance for openings. 3. Find the entire cost of papering the following rooms, at 60 a double roll, bordering 10¢ a yard : 18 ft. by 16 ft. and 9 ft. high. 12 ft. 8 in. by 15 ft. and 9 ft. high. Make no allowance for bordering. 4. Find the cost of the laths, at 25¢ a bundle, required to cover the ceiling and walls of a room 12 ft. by 16 ft., and 9 ft. high, deducting 2 windows 8 ft. by 4 ft. and 1 door 6 ft. by 3 ft. Carpeting is sold by the yard. Brussels carpet is 27 in. wide, ingrain 36 in. In order to ascertain the number of yards needed for a given room, first decide which way the strips shall run, lengthwise or across the room, then, allowing for waste in matching, multiply the length of one strip in yards by the number of strips needed, and the product will be the number of yards needed. 5. How many yards of Brussels carpet will be required to cover a floor 27 ft. long and 18 ft. wide, the strips to run lengthwise? Make a diagram. 6. Find the number of yards of ingrain carpet required to cover a floor 15 ft. wide, 17 ft. 6 in. long, the strips to run lengthwise. 7. How are painting and kalsomining usually estimated? 8. What is the width of the wall paper commonly used? How is it put up? 9. What are the dimensions of plastering laths? How are they generally put up? A bundle will cover how much surface? 10. How many yards of ingrain carpet will be needed for a room 14 ft. wide and 18 ft. long, the strips to run lengthwise? How many strips will be needed? many inches must be turned under? LESSON 77 How Wood cut 4 ft. long is called Cord Wood. A pile of such wood, 4 ft. high and 8 ft. long (128 cu. ft.), is called a cord. 1. How many cords of wood are in a pile 60 ft. long, 8 ft. high, and 4 ft. wide? 2. How many cords of wood can be piled into a shed 32 ft. long, 16 ft. wide, and 20 ft. high? 3. How high must wood, 4 ft. long, be piled upon a sled 12 ft. long to make 2 cords? 4. A shed 32 ft. long, 24 ft. wide, and 14 ft. high is What is the value of the bark at filled with tan bark. A Board Foot is a square foot one inch thick. 5. A cubic foot contains how many board feet? 6. To change cubic feet to board feet by what number do we multiply? 7. To reduce board feet to cubic feet by what number do we divide? 8. How many board feet are there in 2 cubic feet? 9. How many board feet are there in a board 12 inches wide, 10 ft. long, and 1 inch thick? Boards less than 1 in. thick are considered the same in commerce as boards 1 in. thick; that is, a board & in. or in. thick, 1 ft. wide, and 12 ft. long is regarded as containing 12 board feet. But a board 14 in. or 11⁄2 in. thick contains 14 times or 11⁄2 times as many board feet as a board 1 in. thick. Thus, a board 14 in. thick, 1 foot wide, 12 ft. long, contains 11 x 1 x 12, or 15 board feet. 10. Find the number of board feet in a board 15 ft. long and 16 in. wide. = OPERATION 16 ÷ 12 13 ft. = width. 1 × 15 = 20, board feet Ans. We change the width, 16 in., to its equivalent, 1 ft.; then multiply the length by the width, and obtain 20, the number of board feet in the board. 11. Find the number of board feet in a board 16 ft. long and 15 in. wide. 12. Find the number of board feet in a board 15 ft. long, 16 in. wide, and 12 in. thick. |