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Fig. (14) System No. 2A. 



Adapted for structures where beam protection is unnecessary, such as bridge floors, stations, 

 factory floors, purlin roofs, sidewalks, etc. The advantage of this system is the low cost of 

 forms for erection, and the rapidity of installation. 





Fig. (15) System No. 2B. 



Adapted to bridge floors, sidewalks, or wherever the depth of adjoining beams makes its un- 

 economical to haunch the slab into the lower flange of the beam and at the same time the head- 

 room is limited. Like system No. 2A, it is economical in forms and easy of erection. 



