8 

 hence 



and 



INFLUENCE DIAGRAMS 



, H+x' s 



s s+6 

 ' 



(22) 



. . . (23) 



this becomes 



(H+x f ) tan 8 =z' tan 2 (24) 



The ordinate above the point G in the influence diagram 

 satisfies this equality, and therefore G and ra' are in the 

 same vertical line. 



J M 



M^-----RE 



Tan i =1. Tan 2 =- Tan 3 =. 



FIG. 2. 



Vertical of Pratt Truss with Inclined Top Chord. The truss 

 diagram and the influence diagram are shown in Fig. 2. 



