Q$2.$ Calculate the section factor for a steel $H-$ section column shown in Fig Q$2,$ of dimensions $400400m{m}^2.$ The column is exposed to fire on all four sides.

Make calculations for the following:

a$.$ Box$-$type protection and

a$.$ Spray$-$on protection

Given:

Height of section $D=400mm$

Page $2$

Width of section $B=400mm$

Flange thickness $T=21mm$

Web thickness $t=13mm$

Ignore the fillets

$[20$ Marks$]$