52 INFLUENCE DIAGRAMS 



k k 3 

 The above table contains the values of -"7 for unit 



loads placed at the panel points of trusses having from 



4 

 four to nine panels. These values multiplied by 



kk 3 

 give the ordinates represented by 4 , __-. If the ordinates 



in any particular case are laid off in an inverse order the 

 resulting polygon will represent the expression 



FIG. 35. 



Diagonal of a Partially Continuous Truss. The diagonal 

 LzUz in Fig. 35 has its center of moments at the inter- 

 section of UzUz and L 2 L 3 . Since the point of intersection 

 lies upon the left of the left end of the span, s is negative. 



For loads in this span, 



4+6n' 



and 



(85) 



