THE STRUCTURE OF " STEELCRETE" EXPANDED METAL. 



Pages 3 and 4 show sheets of "Steelcrete" Expanded Metal in order that its struc- 

 ture may be best appreciated. The openings are amply large enough to permit the concrete to com- 

 pletely embed the steel. We have elsewhere dwelt upon the importance of the bond and the guar- 

 antee of safety offered by the use of "Steelcrete" Mesh. It is obvious that because of its struc- 

 ture no possibility of slipping is encountered. The quality of the steel is in keeping with its 

 form. Of a uniform grade, in conjunction with an elastic limit of 60,000 Ibs. per sq. in., it is 

 unique in the metal fabrics for reinforcing slabs. Under a stress, the diamond shaped meshes, with- 

 out slipping or any initial rearrangement, obviously introduce a compression into the concrete 

 which at this point is in tension. The beneficial effect of this is apparent, as it aids the concrete. 

 To this feature alone is attributed a good measure of its remarkable strength. Under severe 

 stress these diamonds will shorten, thereby introducing a ductility into this material which is un- 

 encountered in any other fabric for reinforcing slabs. 



There is still another distinctive feature to be noted. The direction of the strands is seen to 

 be in every way. A sudden concentrated load which would prove fatal to any straight line rein- 

 forcement is amply taken care of here, as the' stress will be distributed to all the adjoining strands. 

 No better protection against the unforeseeable could be found than is offered here. Engineers are 

 forced to design with uniformly distributed loads in the absence of any better method. These loads 

 seldom occur. On the other hand, a heavy: concentrated load, or the dropping of a heavy weight 

 from as short a height as one foot, will produce stresses which far surpass the ordinary calcu- 

 lated uniform ones. When you buy reinforcement, buy that which gives you the greatest pro- 

 tection against that which cannot be foreseen, but which is nevertheless probable. "Steelcrete" 

 Mesh offers a protection against shocks, internal or external explosions, and sudden dropping of 

 heavy loads within the building. It is also a protection against the ignorance of the laborer who 

 inserts it, a danger which cannot be too ..strongly guarded against in concrete work. When 

 "Steelcrete" Expanded Metal is specified you choose a material which 'has, stood the test -of al- 

 most twenty years in actual work, and which is unsurpassed in quality, structure or efficiency at 

 the present day. 



The Concen- 

 trated Load 

 and Straight 

 Line Rein- 

 forcement 



23 



