CHAPTER XI. 



FARM BUILDINGS. 



The total value of permanent buildings on farms in 

 1910 was over $16,000,000,000. Of this amount over 

 $3,500,000,000 were invested in farm buildings. When a 

 farmer wishes to build a house or a barn, he plans 

 it according to his wishes and needs, and engages a car- 

 penter, who prepares a bill of materials and an estimate 

 of the cost of the building. 



Bills of materials. An itemized statement of the lum- 

 ber and other supplies necessary for a building is called a 

 bill of materials. Lumber is sold at so much "per M," 

 meaning per 1,000 feet board measure. One foot board 

 measure (B. ]\L) is a piece of lumber having an area of 

 one square foot on one surface, and a thickness of not 

 more than 1 inch. The sign "x" means "by" ; the sign 

 " ' " means "feet," and the sign " " " means "inches." 



606. How many feet B. ^I. in 9 boards 8' x 2' and 1" 

 thick ? 



607. In a %-inch board 6' x 10" ? 6' x 8" ? 6' x 16" ? 

 10' X 18" ? 



608. In a board or plank 24' x 18" x 3i^" ? 



Process : 



18 inches = V/2 feet; 314 inches must be taken as 4 inches. 

 24 X IJ^ X 4 = 144. Ans. 144 feet B. M. 



609. 8' X 12" X 4" ? 16' x 8" x 2" ? 24' x 6" x 4^^" ? 



610. 8' X 8" X 8"? 16" X 8" x 10"? 20' x 6><" x 

 83^"? 



171 



