Q$.4$ The elevation of a two$-$storey masonry building is shown in Figure Q$4.$ Details of the design loading carried by the roof and floor levels on the inner leaf are as indicated. Considering the design data given and the wall A$-$B between the ground and the first floor only, verify or otherwise, the suitability of standard format group $1$ clay units for both leaves with regard to the vertical loading at level A$.$

Design Data:

Total $(25)$

Assume the following:

$($i$)$ the reduction factor $($level A$)$

$0\mathrm{.}71$

$($ii$)$ the reduction factor for effective height of the wall on

$0\mathrm{.}75$

General purpose mortar

M$6$

The characteristic self$-$weight of standard format brick

$2\mathrm{.}2k\frac{N}{m^2}$

Attestation of conformity for the units $($manufacturing control$)$

Category $1$

Execution control for the masonry on site

Class $2$

Normalised compressive strength of the unit $fb($air dried$)$

$25$MPa

Volume of all holes $(\%$ of the gross volume$)$ in the units

$20-25\%$

Thickness of all slabs

$275mm$

Figure Q$4$