86 



CAMBRIA STEEL. 



L 4 PANELS 



II. 6 PANELS 



ROOF TRUSSES 



(PRATT.) 



n=S-5-H=2cot a 

 P= Panel Load. 



Heavy lines in diagrams indicate Compression Members. 

 14 Panels. 



II 6 Panels. 



COEFFICIENTS FOR CALCULATING TRUSS MEMBERS. 



n 



a 



Sec a 



Sec 2 a 



Sec a tan a 



Sec a-\/9 sec 2 a 8 



3 



3341.4 

 1.2018 

 1.4444 

 .8012 

 2.6874 



24 



7 



3015.4' 



1.1577 

 1.3403 

 .6753 

 2.3334 



2 cot 30 



30 

 1.1547 

 1.3333 

 .6667 

 2.3094 



1.1180 



1.2500 



.5590 



2.0156 



5 



2633.9' 2237.2' 2148.1' 

 1.0770 

 1.1600 



1.0833 

 1.1736 

 .4514 

 1.7342 



1.6824 



1826.1' 

 1.0541 

 1.1111 

 .3514 

 1.4907 



