CORRUGATED BAR COMPANY, INC. 



BARS 



One of the assumptions always made in connection with the design of reinforced 

 concrete structm-es is that the steel and concrete are so intimately united by means 

 of the bond that the two materials act together as a single new material. For many 

 years it was insisted upon that the adhesion between concrete and plain bars was 

 sufficient, but as the art of reinforced concrete construction developed the sufficiency of 

 this adhesion began to be questioned and various methods were devised, such as hook- 

 ing or splitting the ends of the bars, to prevent their slipping in the concrete. Such 

 methods are but makeshifts at best, as bond to be effective must be continuous, and in 

 practically all reinforced concrete designs of to-day the demand is for a deformed 

 bar of proper design — a bar that grips the concrete in a positive manner by means 

 of projecting ribs normal to the direction of stress. 



The design tables appearing in this book are based on the employment of a properly 

 designed deformed bar, and their use in connection with other types of bars is not 

 recommended. 



CORRUGATED ROUNDS 



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Standard Sizes 



CORRUGATED SQUARES 



n 



BfB 



II 



Standard Sizes 



164 



