RECTANGULAR BEAMS 



123 



total stress in this part of beam to be taken by the concrete and by the web 

 reinforcement is 



X4xl2-46,0801b. 



One-third of the shear, or 15,360 lb., is assumed to be taken by the concrete, 

 hence the amount to be taken by the web reinforcement is 30,720 lb. 



I500O lb. 15000 lb 



concentrated load concentrated load 



Uniform load-iooo I Ib.perft 



-;::- 3"* double -looped stirrups ) ="? A 



- Area 



representing 

 diagonal tension 

 cared for by 

 one rod 

 B 



"-Moment curve showing 

 where rods may be bent up 



FIGS. 60, 61. 



Since four rods are to be bent, their comparative tensile value is 



Thus, the tensile value of the rods is in excess of the stress to be provided for. 



Now shear is nearly uniform between the support and the adjacent 



concentrated load and, as regards diagonal tension, it would be sufficiently 



