The plans presented are for a classroom block at a local primary school. The structure is of

load bearing masonry block wall construction and supports a $180$ mm thick roof slab. The

thickness of the walls is as shown on the plans and sections. The roof will be used for assembly

purposes during sporting and other activities put on by the school. As the design consultants,

you are required to develop basic reinforced masonry and concrete framing elements for the

building using the requirements of CUBIC. Occupancy loads may be taken from Table $4\mathrm{.}3-1$ of

the ASCE $7-22$ or Table $2-104\mathrm{.}1$ in CUBIC.

General data typical to all groups

Material Specifications & Dead Loads

${}_{\text{c}\text{o}\text{n}\text{c}\text{.}}=24k\frac{N}{m^3}$

Maximum size of coarse aggregate $Ag{g}_{\text{M}\text{a}\text{x}}=20mm$

Dead Loads on slab

Floor tile finishes on roof slab

$1\mathrm{.}2k\frac{N}{m^2}$

Electrical & Mechanical services in roof slab

$0\mathrm{.}35k\frac{N}{m^2}$

Using the guidelines laid out in CUBIC, put in the reinforced concrete stiffeners required

for the block wall masonry building shown.

$(10$ Marks$)$

Make a neat labelled, dimensioned sketch of at least one of the stiffeners type you used

in part $1$ above.

$(5$ Marks$)$

Although stiffeners could be placed in the wall panel between the windows at the rear of

each classroom, it is not absolutely necessary. Explain why.

State if the two wall types in the structure meet the size requirements of load bearing

walls. Give reason$/$s for your answer.

$(5$ Marks$)$