SITUATION $(1-3)$:

Given:

Properties of Steel Column: Depth, d $=305$ mm

Web thickness, tw $=7\mathrm{.}5$ mm

Flange width, bf $=200$ mm

Flange thickness, tf $=12$ mm

Base plate, B x N $=300$ mm x $450$ mm

Loads:

P $=720$ kN H $=160$ KN

Allowable base plate bending stress, Fb $=186$ MPa

Allowable bolt shear stress, Fv $=68$ MPa

Allowable weld shear stress, Fw $=124$ MPa

$1.$ Find the required base plate thickness $($mm$).$ Consider fixity at

the edges of a rectangle whose sides have dimensions equal to

$0\mathrm{.}80$bf and $0\mathrm{.}95$d$.$

a$.24$ mm b$.26$ mm c$.20$ mm d$.22$ mm

$2.$ Using $16$ mm $$ bolts, how many are required to resist the lateral load?

a$.10$ b$.12$ c$.14$ d$.16$

$3.$ Using $8$ mm thick fillet weld, what is the total length $($mm$)$ required to resist the lateral load?

a$.228$ mm b$.230$ mm c$.225$ mm d$.235$ mm