I.I\ K-I.n.M) STRESM 



M-nting positive quantities HIV plotted above the l>ase line: 

 and negative, below. In ca>e the influence line consists of 

 several straight -eminent-, n I- necessary to determine the 

 value of the ordinates only where the influence line has a 

 change of direction; i.e., at the salient points. For example'. 





r... 1. 



the points A, C, and B are the salient points of the influence 

 line in Kip. Ib. 



The value of Z caused by a single load w is equal to 

 w2, if z is the influence ordinate below w. The value of Z 

 caused by a series of loads wi, w t , w*, etc., is 





0) 



