WEIGHT OF COPPER RIVETS 



229 



ing rivets, spaced about 8 to 12 inches apart on the roof and about 2 

 feet apart on the sides. 



Clinch nails are made of J^ inch or No. 10 soft iron wire and are 

 clinched around the purlin. The usual sizes and weights of clinch nails 

 for different lengths of angle and channel purlins are given in Fig. in. 

 Care should be used in punching the holes in the corrugated steel for 

 clinch nails and rivets to get them in the top of the corrugations and 

 to avoid making the hole unnecessarily large. Clinch nails are spaced 

 from 8 to 12 inches apart. Two clinch nails are usually furnished for 

 each lineal foot of purlin and girt. 



Straps are made of No. 18 gage steel, Y^ inches wide, and are 



TABLE XVII. 

 NUMBER OF COPPER RIVETS IN ONE POUND. 



fastened with two 3-1 6-inch stove bolts ^ inches long. Straps are 

 spaced 8 to 12 inches apart. One strap and two bolts are usually fur- 

 nished for each lineal foot of purlin and girt. One bundle of hoop 

 steel for making straps contains 400 lineal feet and weighs 50 Ibs. 



Clips are made of No. 16 gage steel, ij^" x 2^2", and are fastened 

 with two 3- 1 6-inch stove bolts J/ inches long. Clips are spaced from 

 8 to 12 inches apart. One clip and two bolts are usually furnished for 

 each lineal foot of purlin and girt. 



