STORAGE AND DISTRIBUTION. 



point in designing is to ensure that the steel bars 

 are always in tension. In the illustration (fig. 90) 

 a somewhat novel construction is employed. The 

 circles show old wire haulage rope which was used 

 for the reinforcement. When they are packed quite 

 level a very good form of construction results. They 

 must be pulled straight while ramming the concrete. 

 The dotted lines show small wire binding twisted 



WiivRcpe 



FIG. 90. 



round each of the bars. In the view showing the 

 counterfort in elevation is seen small wire binding 

 placed at intervals of 18 in. round the continuous 

 wire ropes. The wall was designed for a depth of 

 water of 7 ft. 



Another wall of a similar nature is discussed and 

 illustrated in fig. 96. 



In passing, it is necessary to find out what effect 

 earth pressure has on retaining walls. In tanks 



