THE STRESSES IN A STEEL WATER-TOWER. 14*1 



4. Weight of structure, weight of water, and wind pressure. 



Each part of the structure must be designed to resist the 

 maximum stress that can result from any combination of the 

 above. Generally loading No. 2 governs the design of the 

 tank, circular girder and horizontal curved girder; No. 3, the 

 anchorage, the tension connections of tank to posts, and the 

 bracing of the tower; and No. 4, the posts and foundations. 



The assumptions made in the analysis for wind stresses are 

 belie ved to be reasonable and on the side of safety. When there 

 are several alternative assumptions that one should be used 

 which gives maximum results for the member under considera- 

 tion. The wind stresses in the tank shell and the circular girder 

 are indefinite, but it is believed that they are small compared 

 with the gravity stresses in these members, and can be neglected. 



In some cases the Stresses in certain members are so small 

 that they need not be considered in designing. However, it is 

 not safe to neglect them in the general discussion, since in struc- 

 tures of unusual proportions they might be important. 



