Question $3(10$ marks$)$

Indoor joists supporting a rooftop terrace in Waterloo $($Snow Load $=2\mathrm{.}0$kPa $)$ need to also support

a live load of $1\mathrm{.}9$kPa. The joists are S$-$P$-$F No$\mathrm{.}1/2,$ span $2\mathrm{.}5m($single span$),$ and are bridged. For

the joist spacing, round the last $3$ digits of your student number to the nearest of $300,400,$ or $600.$

The rooftop is clad with $18\mathrm{.}5mm$ plywood, $150mm$ rigid insulation, and $38mm$ concrete.

Determine an appropriate size for the joists. Then, compare the joist size with the Part $9$ tables

for floor joists and roof joists.