MATERIALS TESTING LABORATORY CARNEGIE TECHNICAL SCHOOLS. 



A 



Convincing 

 Pittsburgh, Pa., February, 1911. Test 



TESTS OF BEAMS 



FOR 



THE CONSOLIDATED EXPANDED METAL COMPANIES. 



Three beams were made in order to test the efficiency of different laps of 3-9-175 "Steelcrete" 

 Expanded Metal. 



The beams were 6x10 inches by 7 feet, and were reinfoiced with 9 inch strips of 3-9 175 

 "Steelcrete" Expanded Metal, at a distance of 1 inch above the bottom of the beam, the lap being 

 at the center of the beam. The proportions of the gravel concrete were: 1, 1^, 4^, and it was 

 machine mixed. 



The beams were broken at the age of 26 days with an Olsen Universal Machine, the load 

 being applied at the third points, on a span of 6 feet. See sketch below. 



Fig. (9) Method of construction used in lap tests. 



