520 
Journal of Agricultural Research 
Vol. XI, No. io 
Therefore, the curb of the parapet should be so designed that it will 
have a resisting moment equal to that of a width of 1.52 feet of the slab, 
making allowance for the greater stiffness of the parapet section. 
In constructing slabs designed in this manner it is needless to say 
that the curb of the parapet must be added before the concrete of the 
slab has taken initial set. 
