3 -20d. wire nails. 



ROOF. 



Materials for roofs of different pitches are 

 provided in the list. Use within the respective ranges 

 of elevations the roofs of stated pitches. 



Exception to the above should occur only where 

 snowfall is not a source of hazard as on the southern 

 -Forests and on the Llodoc. 



Roof trusses should be well nailed with lOd. 

 nails in 1" members and 20d. nails in 2" members. Do 

 not over -nail. Five nails in surface 6" x 6" are enough. 



Rafters and other members of the roof frame 

 should be of selected straight grain lumber; 1st choice 

 Douglas fir, 2nd choice White fir, 3rd choice Yellow 

 pine, free from knots and other imperfections. Too much 

 attention cannot be given to the selection of the best 

 sticks of the lumber order for rafters. 



Care should be taken to cut the rafters true 

 in order that they rest firmly on the plate, and meet 

 squarely at the apex of the roof. 



Roof projections should be sheeted solid with 

 1" x 12" rough or dressed lumber. 



Rafter ends should be finished in the manner 

 illustrated by the diagram "Section". 



Use for roof covering either - 



(a). Star A. Star red cedar or redwood shingles, 

 (b). Shakes of White fir or Sugar pine, 

 (c). Galvanized iron (See B.LI. Page 8). 



Lay shingles 4-J-" to weather on sheeting 8" 

 on center. Nail them with 3d. fine galvanized shingle 

 nails. Lay the bottom course of shingles double and 

 project it l" beyond the sheeting. Allow a 1" project- 

 ion of shingles over the barge board trim. Table Ho. 

 B.M.-2 gives data on shakes. If shakes are used, allow 

 1%" projection at eaves and 1" projection over barge 

 board trim. 



-9- 



