A slab plan is shown below. The typical beam width is $550mm.$ The slab supports an indoor garden and has an exposure class of $S-2.[10$ marks$]$

Given:

$f_c=20$MPa

$f_y=400$MPa

Super$-$imposed dead load $=8\mathrm{.}0$kPa

Live load $=2\mathrm{.}4$kPa

Which way does the slab span? Explain. Select a slab thickness, using an increment of $10mm,$ which will work for the entire slab.

Check the requirements of Clause $9\mathrm{.}3\mathrm{.}3$ for frame analysis and design the slab checking it against all code requirements. $($Reminder: consider the number of spans when choosing load coefficients!$)$

Select most economical rebar size and spacing. Design the slab using the same positive moment reinforcing in all bays, and the same negative reinforcing above the beams. $($Design for $2$ regions$).$

Provide a design summary by sketching a section and indicating the design details.