REENFORCED CONCRETE 271 



CALCULATED STRESS IN STEEL REENFORCEMENT 



220. Other uses of reenforced concrete. Reenforced concrete is 

 now used for foundations, piers, columns, floors, chimneys, standpipes, 

 reservoirs, dams, tunnels, sewers, bins, bridges, piles, railroad ties, 

 fence posts, and many other constructions. Its recent development 

 along all these lines has been very rapid, but many more investigations 

 will be necessary before its physical properties are definitely fixed. 

 Until recently no attempt was made in this country to standardize 

 experimental results in this line, but the work is now being done 

 under the direction of a joint committee from the various national 

 societies interested, and it is hoped that within a short time much 

 more satisfactory information will be available. 



