STEEL REINFORCEMENT 



265 



manufactured has a unit tensile strength of about 65,000 Ib. 

 and an average elastic limit of about 30,000 Ib. It is 



FIG. 10 



principally used in reinforced-concrete construction as slab 

 reinforcement. The sizes of expanded metal are given in the 

 accompanying table. 



Kahn Expanded Metal. Another concrete-slab reinforce- 

 ment, called Kahn expanded metal, is shown in Fig. 10. This. 



PROPERTIES OF KAHN EXPANDED METAL 





i 



4*. 



gfeS-g 



8,640 

 5,760 

 4,320 

 3,420 

 2,880 

 2,520 

 2,160 



s 



rt o 



^* 



33,600 



L'LMOO 



16,800 



1 3. :*()() 



11,200 



9,800 



8,400 



o S 



II 





17 

 25 

 33 

 11 

 49 

 57 

 65 



2.13 



1.43 



1.08 



.87 



.72 



.62 



.55 



form of reinforcement is manufactured by shearing a rolled 

 section along lines parallel with its length, and then pulling 



