EXPANDED METAL AND PLASTER 



265 



ing strips 16 inches apart, and on these strips was laid a floor of 

 tongued and grooved maple boards 1^4 inches thick and 2.^/2 inches 

 wide. The upper floors are made of concrete slabs reinforced with ex- 

 panded metal, and supported on beams spaced 4 to 15 feet apart. Where 

 the spans exceed 7 feet suspension bars 7" x y%' were placed 3 feet 

 apart and were bent around the flanges of the beams. The concrete 

 filling was composed of I part Portland cement, 2 parts sand and 6 

 parts cinders. (For another description of this building see Engineer- 

 ing Record, August 25, 1900.) 



-?" I Peom 



7"! Beam 



e -T'I Beam 



- - - 15-0" X 



FIG. 132. SIDE ELEVATION OF STEEL BUILDING COVERED WITH EX- 

 PANDED METAL AND PLASTER. 



The Northwestern Expanded Metal Co. now recommends that the 

 first coat of the plaster used for curtain walls be composed of two parts 

 lime paste, I part Portland cement and 3 parts sand, and that the wall 

 be finished with a smooth coat composed of I part Portland cement and 

 2 parts sand. 



For coating on wire lath the following has been found to give 

 satisfactory results in Chicago and vicinity : For the. first coat use a 



