The butt connection shows $8-22mm\frac{O}{A_{325}}$ bolts spaced as follows:

$S_1=40mm,S_2=80mm,S_3=50mm,S_4=100mm$

Thickness of plates $($top and bottom$)t_1=16mm$

Thickness of plate $($middle$)t_2=12mm$

$F_y=248$MPa,$F_u=400$MPa

Allowable tensile stress on gross area $=0\mathrm{.}6Fy$

Allowable tensile stress on net area $=0\mathrm{.}5Fu$

Bearing stress on projected area, $F_p=1\mathrm{.}5F_u$

Allowable bolt shear stress, $F_v=120$MPa

Assume the hole diameter is $3mm$ more than the bolt diameter

Calculate the allowable tensile load base on:

a$.$ Gross area of the plate

b$.$ Net area of the plate

c$.$ bolt shear

d$.$ bearing on the projected area on plate

e$.$ Block shear