STRESS OR STRAIN. 87* 



on any one rod. Against this wind pressure the force of the 

 load due to the tank weight or metal is opposed and must be 

 considered. 



If W = the total "dead" load (160,000 Ibs.) and the number 

 of rods, N = &, then the net maximum reaction will be 



^rwind reaction or 87,599 Ibs. in the case under consideration. 



The maximum reaction will occur at E, Fig. qa, when the 

 wind is as shown. 



FIG. f)C. Connection Details. 



Assuming 15,000 Ibs. as a safe working value or allowable 

 stress for the rod metal, we have - - = 5. 833 square inches of 



rod cross-section and the nearest approximate size is 2f inches. 

 The anchors at A and B, Fig. 90, being on the neutral axis 

 when the wind is as shown, receive no longitudinal strain as no 

 fiber stresses occur at the neutral axis within the elastic limit, 



M W 



and the pull on the rods C f and D is S= J -r ^-. 



