GRAPHIC RESOLUTION 71 



The live load web stresses may all be obtained from a single dia- 

 gram as follows: With an assumed left reaction of, say, 100,000 Ibs. 

 construct a stress diagram on the assumption that the truss is a canti- 

 lever fixed at the right abutment and that there are no loads on the 



20-0 



4 17.6O 



Warren Truss. 

 5 pan IfcO'-O*! 

 R - 7 Tons. 



FIG. 47- 



truss. Then the maximum stress in any web member will be equal to 

 the stress scaled from the diagram, divided by 100,000, multiplied by 

 the left reaction that produces the maximum stress. This method is a 

 very convenient one for finding the stresses in a truss with inclined 

 chords. 



