96 BUILDING PEOBLEMS 



of the square for the upper cut ; (5) next place the point of 

 the run (on the blade) on the lower mark with the point of 

 the rise (on the tongue) upon the line ; (6) mark the posi- 

 tion of the blade for the lower cut ; (7) before removing the 



Watt Plate Cut\ 



RAFTER PATTERN WITH PROJECTION FOR EAVES 



square from this position, erect a perpendicular to the square 

 at the point of the run (on the blade) for the cut that fits 

 against the outside of the roof plate ; (8) if the projection is 

 to be 1 ft., saw off the rafter 1 ft. below this mark. 



EXERCISE 



1. Lay off on a board the pattern of a rafter for a house 

 18 ft. wide, ^ pitch, the projection of each rafter being 1 ft. 



2. Lay off on a board the pattern of a rafter for a coal shed 

 8 ft. wide, i pitch, the projection of each rafter being 9 in. 



3. Lay off on a board the pattern of a rafter for a wagon 

 shed 10 ft. wide, J pitch, the projection being 9 in. 



4. Estimate the lumber bill for the house on page 97, the 

 rough stock being as follows : studding, 167 pieces, 2 in. by 

 4 in., 12 ft. long ; sills, 16 pieces, 2 in. by 8 in., 16 ft. long ; 

 girders, 12 pieces, 2 in. by 8 in., 16 ft. long ; floor joists, 40 

 pieces, 2 in. by 8 in., 10 ft. long ; floor joists, 20 pieces, 2 in. 

 by 8 in., 12 ft. long; ceiling joists, 40 pieces, 2 in. by 6 in., 

 16 ft. long ; weatherboarding, 6-inch width ; ceiling, 3j-mch 

 width ; floors, 3^-inch width ; brick for 2 one-stove flues, 



