TABLE 58. 

 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 properties of sections not given in table may be found as follows: 



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

 flanges turned in, 10* in. back to back. 



From Table 14, Area = 8.92 in. 2 . _ _ 



I ^ = I x from Table 20 = 133.8 in. 4 ; r A = V/ A -T- A = Vi33-8 *- 8.92 = 3.87 in. 



I B = Iy from Table 20 = 194 2 in. 4 ; r B = V/ B -i- A = Vi94-2 -r- 8.92 = 4.68 in. 



Example 2: Required the proper-ties of a section consisting of 2 [s 10 in. at 15 lb., laced, with 

 flanges turned in, 12 in. inside to inside of web. 



From Table No. 14, Area = 8.92 in. 2 . 



I = I 



_ 



A = x om Table 21 = 133.8 in. 4 ; T A = V/ A -f- A = Vi33-8 -i- 8.92 = 3.87 in. 

 I B = I Y from Table 21 = 284.4 in. 4 ; r B = V/ B -5- A = "^284.4 -5- 8.92 = 5.65 in. 



114 



