Question 7

See questions over page regarding the following building:

The basement carpark level has a floor area of 1500m2, an internal height of 2.5m, and accommodates more than 40 vehicles. Levels 1 to 4 also have a floor area of 1500m2 each and an internal (slab to slab) height of 3.3m and a ceiling height of 2.8m. Generally, each storey of the building is a separate fire compartment.

The plant room at level 5 has a floor area of 150m2. It contains, water tanks, air- conditioning equipment and lift motors.

The building is reinforced concrete framed (ie. reinforced concrete columns, beams and floors).  The type of external wall cladding to be utilised has not yet been selected however, will be either infill masonry, or glazing in metal framing. The external walls will be insulated, and the glazing will be either high performance glazing or shaded to achieve compliance with Section J of the NCC. Internal walls including shaft walls will be of lightweight construction.

The roof will be steel framed with colour bonded metal roof sheeting atop.

Questions regarding the Building

Based on the diagram and the foregoing information provide responses to the following questions:

(a) Specify the most efficient FRLs required of the following building elements, and if the building element is also required to be non-combustible state so. If you determine that no FRL is required state the DTS Provisions on which you rely for your answer:

NB.  Your answers must take into account any relevant concessions, the requirements regarding separation of parts of different classifications, and the support for another part requirements - assuming horizontal building elements will be providing lateral support to vertical elements:

(i) Floor A -

(ii) Floor B -

(iii) Floor C -

(iv)  Floor D -

(v)   Roof -.

(vi)  Internal columns to the at the basement carpark level -

(vii)  External wall B at level 5 -

(viii) Non-loadbearing part of external wall B at level 1 -

(ix)  Loadbearing parts of external wall B at level 4 -

(x)   Non-loadbearing parts of external wall A at level 3 -

(xi)  Loadbearing parts of external wall A at level 4 -

(xii)  Internal lift shaft walls level 4 (assume they are loadbearing) -

(xiii) Internal lift shaft walls at the basement carpark level (assume they are loadbearing)

(b)   Specify the required fire hazard properties for the following:

(i) Floor linings to the public corridors of level 3 (NB  There is more than one office tenancy on levels 2 and 3) -

(ii) Wall linings inside the principal office tenancy at level 2.  The tenancy is an open space office that will have floor dimensions of 20m X 40m -

(iii) Floor linings to the lift lobby in the basement carpark -

(iv)  Floor linings to the fire-isolated exits (notwithstanding that the carpark will be sprinkler protected assume the fire-isolated exits will not) -

(v)   Floor linings to the lift car -

(vi)  Kitchen cupboards in the staff lunchroom on level 3 -