46 



STEEL ROOF TRUSSES AND MILL BUILDINGS. 



CHAP. I. 



The building proper is 135 ft. wide by 354 ft. long. The main trusses are of the modified saw 

 tooth type with 44 ft. spans and a rise of j, and are spaced 16 ft. centers. The general details of 

 one of the main trusses are shown in Fig. 40. The building has an independent steel framing with 



Jamb to run I?" 

 !nto ground and 



-^i" 



Corr- Sheeting to be fastened to I 4. angle frame top and bottom* 



Corrugated Steel to be of same gage as siding* 

 Rivets on inside frame, N--5 wire- r/oles for fastening inside to outside 

 frame for H-5 wire 



Rivets on outside frame ? inch Inside frame to be shipped bolted in place 

 Jf desired bo cheapen construct/on of door, omit side and center angles of inside frame- 



FIG. 37. DETAILS OF A SLIDING STEEL DOOR. AMERICAN BRIDGE COMPANY. 



brick curtain walls on the exterior. Pilasters 24 in. by 20 in. are placed 16 ft. apart under the ends 

 of the trusses, the intermediate curtain walls being 12 in. thick. The roof is a 5 ply slag roof laid 

 on tongued and grooved spruce sheathing, which is spiked to 2 in. X 5 in. spiking strips, which are 

 bolted to 8 in. channel purlins spaced 6 ft. centers. 



