QUESTION $3[20$ Marks$]$

a$)$ Compare the use of timber formwork with aluminum formwork from the perspective of project time, cost and quality.

$[3$ marks$]$

b$)$ Calculate the quantity required of the slab formwork with the following dimensions $180$ mm thick, $5\mathrm{.}5$ m wide, and $28$ m long shown in Figure $1.$ The slab is to be poured with Grade $30$ concrete. Assume concrete density is $150I\frac{b}{c}$uft$(2403\frac{kg}{m^3})$ and that the formwork live load is $0\mathrm{.}72$ kPa $).$ Describe the procedures of formwork quantity calculation whilst calculating the quantity of the sheath, joists and stringers required. You need to select the necessary lumber to be used.

Figure $1$: Slab Formwork Design

$[10$ marks$]$

c$)$ "Ahmad wants to build a steel water tower of $15$ m high".

Based on this scenario, suggest one type of steel structure which is suitable with his requirements and the types of connection. Sketch and explain why you choose that type of steel structure.

$[7$ marks$]$