CHAPTER XXI 



design for reservoir in reinforced concrete 



Eein forced Concrete Tank or Eeservoir 



Tanks or reservoirs are often required on farms, for the purpose of 

 storing considerable quantities of water, especially in the drier parts of 

 the country. For example, such a tank, or tanks, might be required 

 in order to store water from a pump driven by a windmill, so as to 

 tide over windless periods. These tanks are generally built mostly above 

 the natural ground surface, being sunk only far enough to obtain a firm 

 foundation. No material is more suitable for the construction of such 

 tanks than reinforced concrete which, on account of its freedom from 

 cracking and subsequent leakage, is much superior to plain concrete 

 for this purpose. 



Drawings are reproduced in Figs. 179 to 184 for a reinforced concrete 

 tank 30 feet square (in plan) which, when filled to a depth of 4' 6", 



Fig. 179. — Perspective view of reinforced concrete tank. 



will hold 25,300 gallons of water. Fig. 179 is a perspective view of 

 the finished tank, which will render its general form clear to the reader. 

 Each of the four walls is supported by three piers, or buttresses. Con- 

 crete of 1:2:4 proportions may be employed, the broken stone being 

 small enough to pass a |-inch square mesh, and too large to pass a 

 i-inch mesh. 



