272 



STEEL REINFORCEMENT 



1 



Kahn bars with the 

 prongs bent upwards 

 so as to form stirrups. 

 The bars are usually 

 placed in the forms 

 on a 2-in. bed of con- 

 crete, and after being 

 centered, or registered 

 in their proper posi- 

 tions, they are secured 

 by wiring or by block- 

 ing. In order that 

 the girders and beam 

 connections over col- 

 umns may have con- 

 tinuity, an inverted 

 Kahn bar b is used 

 over such junctions. 



Kahn bars are 

 spaced in each corner 

 of the column, as 

 shown in Fig. 3, with 

 the prongs bent at 

 right angles. The bars 

 are usually tied to- 

 gether with heavy wire 

 or light rods, wound 

 around them as shown 

 part way up the col- 

 umns in Fig. 2. 



The Kahn bar is fre- 

 quently used with con- 

 crete and hollow terra- 

 cotta tile to form floor 

 systems designed for 

 light loads. This type 

 of construction is illus- 

 trated in Fig. 4. In 

 view (a) is shown a 



