— 28 
CHANNELS. 
Depth. 
Width of Flanges. 
Thickness of Web* 
Weight per foot. 
iiH" 
23.5» 
ic} " 
W 
21.1* : 
9i ° 
* /# 
26.0* 
9i 〃 
3*〃 
”•5* 
9i ° 
3” 
A" 
ai.a* 
分 ，， 
3 *" 
21.5* 
7i ° 
26.4* 
7l " 
3 長 " 
18.8» 
W 
各，， 
13.1* 
5Ü" 
ず 
10.8*» 
4 ” 
4，， 
17.1* 
H 0 
■h” 
6.9« 
N. B. The widths and thicknesses are given at their minima, and can be 
increased by a quarter of an inch or less. 
