Exception to the above should occur only where 

 snowfall is not a source of hazard as on the southern Forests 

 and on the Modoc. 



Roof trusses should be well nailed with lOd. nails 

 in 1 inch members and 20d. nails in 2 inch 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, 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 illus- 

 trated by the diagram "Section", 



Use for roof covering either - 



(1) Star A Star red cedar or redwood shingles 



(2) Shakes of white fir r sugar pine 



(3) Galvanized iron (see B.M. Page 8) 



Lay shingles 4 or 5 inches to weather on sheeting 

 8 inches on center* Nail them with 3d. fine galvanized 

 shingle nails. Lay the bottom course of shingles double and 

 project it 1-J- inches beyond the, sheeting. Allow a 1 inch 

 projection of shingles over the barge board trim. Table 

 No. B.M. -2 gives data on shakes. If shakes are used allow 

 rj- inches projection at eaves and 1 inch projection over 

 barge board trim. 



The ridge of the roof should be finished with 

 1" x 6 n excepting in cases where galvanized iron roofing is 

 used. With it, use galvanized ridge capping, 



-10- 



