REPORT 



OF 



LOAD TESTS 



MADE ON 



REINFORCED CINDER CONCRETE FLOOR SLABS 



FOR 



THE CONSOLIDATED EXPANDED METAL COMPANIES 



AT THE 



Materials Testing Laboratory of the Carnegie Technical Schools 



PITTSBURGH, PA. 



TESTS CONDUCTED BY 



FRANK M. McCULLOUGH, B. S. C. E. 



Assistant Professor in Civil Engineering 

 PITTSBURGH, PA. 



JULY 22, 1911. 



Tests on cinder concrete floor arches or slabs made in the Materials Testing Laboratory of the 

 Carnegie Technical Schools during the spring of 1911. The purpose of the tests was to determine 

 the efficiency of expanded metal in flat arch or slab construction. 



Tests were made on four arches and three sizes of expanded metal. The slabs were loaded 

 with pig iron and deflection readings were taken at increments of about 150 Ibs. per sq. ft. in the 

 loading. The age of the slabs when tested varied from 54 to 61 days. 



MATERIAL. 



Lehigh cement, local sand dredged from the river, and screened anthracite cinders were used. 

 The cement passed the American Society for Testing Materials specifications. The weight per 

 cu. ft. of the damp cinders and sand was 48 Ibs. and 82 Ibs. respectively; the voids 01 the dry 

 cinders and sand were equal to 59% and 44, respectively. 



