Ex $02$:

An internal loadbearing masonry wall has a clear height $h$ of $2500mm$ and supports a stiff continuous floor together with loads transferred from upper storeys.

Loads acting on this section of masonry are:

Characteristic dead load $127\mathrm{.}5k\frac{N}{m}$

Characteristic imposed load $15\mathrm{.}0k\frac{N}{m}$

It is necessary to use a $190mm$ high $140mm$ wide concrete block masonry unit.

What strength block masonry unit,

$($i$)$ in Group $1$ and

$($ii$)$ in Group $2$ hollow formats,

would be required to carry the applied loads?

Assume M$4$ general purpose mortar is to be used.

Assume Category II attestation of conformity masonry unit and Class $2$ execution control.