276 



STRESSES IN A CAMEL-BACK TRUSS. 



Art. 137. 



the left-hand reaction will be unity. For any other value of 

 the reaction, the stress diagram will be a similar figure for all 

 members from the left end of the truss to the point where the 

 first load is met. As there are no loads between any web mem- 

 ber and the left end of the truss when that member gets its 

 maximum stress, this diagram may be used to find the maximum 

 live load stresses in the web members, by multiplying the scaled 

 stresses by the left-hand live load reaction for each position of 



FIG. 195. 



the load. These correspond to the live load coefficients in a truss 

 with parallel chords. 



For D' 2 



Load 1 on 



. L.P.L. 



Loads 1 and 2 on 



Ri= 



L.P.L. 



D 4 and F 3 Loads 1, 2, and 3 on 



1= ^XL. L. P. L. 



in 



Z) 3 and F 2 Loads 1, 2, 3, and 4 on RI = XL. L. P. L. 

 D 2 Loads 1, 2, 3, 4, and 5 on R = XL. L. P. L. 



