APPENDIX I. 



GENERAL SPECIFICATIONS FOR 



STEEL FRAME MILL BUILDINGS 



MILO S. KETCHUM, Assoc. M. AM. Soc. C. E. 

 1903 



GENERAL DESCRIPTION 



1. The height of the building shall be the distance from 

 the top of the masonry to the under side of the bottom chord 

 01 tne truss. 



2. The width and length of the building shall be the 

 extreme distance out to out of framing or sheathing. 



3. The length of trusses and girders in calculating 

 stresses shall be considered as the distance from center to cen- 

 ter of end bearings when supported, and from end to end when 

 fastened between columns by connection angles. 



4. The pitch of roof for corrugated steel shall preferably 

 be not less than y\ (6" in 12"), and in no case less than %. 

 For a pitch less than ^5 some other covering than corrugated 

 steel shall be used. 



5. Trusses shall be spaced so that simple shapes may 

 be used for purlins. The spacing should be about 16 feet for 

 spans of, say, 50 feet and about 20 to 22 feet for spans of, say, 

 100 feet. For longer spans than 100 feet the purlin 3 may be 

 trussed and the spacing mav be increased. 



Height of Building. 



Dimensions of 

 Building. 



Length of Span. 



Pitch of Roof. 



Spacing of Trusses. 



