Bui. 801. U. S. Dept. of Agriculture. 
Plate XVI. 
FIG. I. — CEILING SHOWING A REINFORCED CONCRETE FLOOR ABOVE. 
Note the arrangement of sprinkler piping. 
Fig. 2. — Interior View of a Flat Slab Design of Reinforced Concrete. 
Note the unbroken surface of the ceiling so advantageous in the diffusion of light and well adapted to 
deflection of water from hose stream and sprinklers. 
