QUESTION $1$

$[35$ MARKS$]$

Design moment reinforcement, and check the shear and deflection, for a waffle slab as per

SANS $10100.$ The panel in question has $3$ edges which are discontinuous and $1$ short edge

which is continuous. The overall floor system is constructed on a $10m8m$ module $($Figure

Q$1$ below$).$ The total dead load is $4k\frac{N}{m^2}$ and the imposed load is $6\mathrm{.}2k\frac{N}{m^2}($both unfactored$).$

The materials of construction are grade $35$ concrete, grade $450$ reinforcement $($high tensile$)$ and

grade $250$ mild steel. Consider the exposure condition to be moderate. Use Y$16$ bars for main

reinforcement, and R$8$ stirrups$/$links as necessary. Assume ${}_b=1.$ Also, assume the topping

thickness $=80mm($thus no need to calculate it$).$ Should the shear resistance or deflection

design be not feasible, make recommendations $($no need to redesign here$).$