Two or more joints should not occur on the 

 same line of foundation posts. Arrange to have the 

 splices made over foundation posts of different sets. 



ROOF. 



Materials for roofs at different elevations 

 are provided. At elevations within the ranges men- 

 tioned use the roofs of stated pitches. Exception 

 to the above should occur only where snowfall is not 

 a source of hazard as on some of the southern Forests 

 and on the Modoc. 



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 the selection of 

 the best sticks of the lumber order for rafters. 



Where roof trusses are used fasten the mem- 

 bers securely with lOd. nails in members one inch 

 thick and vdth 20d. nails in members two inches thick. 



Care should be taken to cut the rafters 

 true in order that they rest firmly on the plate and 

 meet squarely at the ape:: of the roof. 



Roof projections should be sheeted solid 

 with I"xl2" rough or dressed lumber. 



Rafter ends should be finished in the man- 

 ner illustrated by the diagram "Section," 



Use for roof covering either - 



(1) Star A Star red cedar or redwood shingles 



(2) Shakes of white fir or sugar pine 



(3) Lay shingles 4^-" to weather on sheeting 

 8 inches on center. Wail them with 3d. fine gal- 

 vanized shingle nc.ils. Lay the bottom course of 

 shingles double and project it Itr inches beyond 

 the sheeting. Allow a one inch projection of shin- 

 gles over the barge board trim. Table No. B. M.-2 



-15- 



