266 



STEEL REINFORCEMENT 



the metal so sheared in a direction at right angles to the lines 

 of shear. In this type of expanded metal, the main bars 



FIG. 11 



of the section represent the material available for the rein- 

 forcement of the slab, while the light cross-bars act as spacing 

 bars and also as shrinkage rods when embedded in concrete. 

 The advantage claimed for the Kahn expanded metal is 

 that it transmits the load directly to the supports without 

 any tendency to elongate or distort. The properties of this 

 reinforcing metal are given in the accompanying table. 



FIG. 12 



Herring-Bone Metal Lath. In Fig. 11 is shown a type of 

 expanded metal known as herring-bone metal lath. This. 



