Fig. (18) System No. 4A. 



This is the strongest form of construction for floor slabs. It is adapted to warehouses, brew- 

 eries, garages, press floors, etc. 



Fig. (19) System No. 4B. 



Similar to system No. 4A. Adaptable to buildings where flange protection of beams is not 

 required. Its advantage is ease and speed of erection. 



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