CORRUGATED STEEL. 



19 



Fastenings for Corrugated Sheeting. Corrugated steel is fastened to purlins and girts usually 

 by the following fasteners. 



Straps. These are made of No. 18 U. S. gage steel, f of an in. wide. These straps pass 

 around the purlins and are riveted to the sheets at both ends by jV' diameter rivets, f in. long; 

 or, they may be fastened by bolts. Order one strap and two rivets, or bolts, for each lineal foot 

 of ^irt or purlin, to which the corrugated steel is to be fastened, and add 20 per cent to the number 

 of rivets for waste, and 10 per cent to the straps or the bolts. One thousand rivets will weigh 

 6 Ib. ; one bundle of hoop steel will weigh 50 Ib. and contains 400 lineal feet. 



Z Channels 



Laced 



(a) 



n 



^Channels 



2 Plates 



CO 



2 Channels 



I I Beam 



(d) 



K 



4 Z Bars. 



I Plate 



fe) 



4 Angles 



I Rate 



(f) 



II Beam 

 (h) 



I Angle 

 (U 



H 



Gray 

 (I) 



4 Angles 



Box Laced 



(m) 





4 Angles 



Box Laced 



(n) 



4 Angles 



Starred 



(O) 



FIG. 14. TYPES OF COLUMNS FOR STEEL MILL BUILDINGS. 



Clinch Rivets or Nails. These are special rivets or nails made of No. 9 Birmingham gage 

 wire, which clinch around the edge of the angle iron or channel and are used for fastening the steel 

 sheathing to steel purlins or girts. They are of the lengths shown on page 24. 



