TABLE 57. 

 PROPERTIES OF COLUMN SECTIONS. 



The table given above is intended to serve only as a guide in the choice of sections, and not as 

 a complete table. The pioperties of sections not given in table may be found as follows: 



Example. Required the properties of a section consisting of 2 [s 10 in. at 15 lb., laced, with flanges 

 turned out, 8J in. back to back. Distance inside to inside of web = 8 J + J = 8f ". 



From Table 14, Area = 8.92 in. 1 . 



/4 = I x in Table 19 = 133.8 in. 4 ; r A = \ 

 I B = I Y in Table 19 = 207.0 in. 4 ; r B = VJ 



A = Vi33.8-i-8.92 

 A = -^207.0 -s- 8.92 = 



3.87 in. 

 4.81 in. 



113 



