62 INFLUENCE DIAGRAMS 



The influence diagrams for S are shown in Figs. 40c 

 and 40d. 



The criterion for wheel loads which produce the maxi- 

 mum moment is 



Beam Fixed at One End and Supported at the Other End. 



k k 3 

 In this case referring to Fig. 41, M L =Q, M R = Wl ~ , 



JL 



and 



^=-W^+^. . . (94) 



77? 



The influence diagram for --- is the base diagram drawn 



s 



with CD = unity as shown by the heavy lines in Fig. 4la* 



k k 3 

 The influence diagram for -~ i> s the figure DGBD and 



M 



the influence diagram for - - is the shaded area. For 



s 



any other center of moments the only line changed is DA. 

 For vertical shear 



(95) 



The influence diagram for S is shown by the heavy lines 



kk 3 

 in Fig. 416. The curve representing ^ is drawn above 



DB and then the shaded area is the influence diagram 

 for &. 



