ROOF . 



I.Iaterials for roofs at various elevations 

 are included in the tmilder : R list of materials. That the 

 mp.nsf.rd type of roof is not adapted for regions of 

 heavy snowfall should be borne in mind. On the average 

 Sierra Forests the barn with the roof of the mansard 

 type should not be erected at elevations above ??00. 

 Exceptions should occur only vhere snowfall is net a 

 source of hazard as on the llodoc, and perhaps a paxt of 

 the Sequoia Forest. 



Roof trusses should be well nailed with lOd. 

 mils in 1" members, and 30d. nails in 2" members. Do 

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



Rafters and other meoibers of the roof frS'in 

 should be of selected straight grain lumber; 1st i'boine 

 Douglas fir, 2nd choice white fir, 3rd choice Yellow pine, 

 free from knots and other imperfections. Too mu::h 

 attention cannot be given to the selection of the best 

 sticks of the lumber order for rr.fters. 



Care should be taken to out the rafters true , 

 in order that they will rest firmly upon the plate, and 

 raeet squarely at all angles. 



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 ijron (See B.M. Ifcge 8) 



Lay shingles 4^- or 5" to weather on sheeting 

 8" on center. liail them with 3d. fine galvanized shingle 

 nails. Lay the bottom course of shingles double and 

 project it !" beyond the sheeting. Allov; a 1" projection 

 of shingles over the barge board trim. Table Wo. P.M. -2 

 gives data on shakes. If shakes are used, allow 1-J-" 

 projection at eaves and 1" projection over barge board 

 trim. 



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