Floor Framing Assessment using AS1684

ASSESSMENT 7
Student’s Name:
Institutional Affiliation:

Floor framing
Question 1(Using AS1684)
i) According to the architectural plans, the maximum width of the building is 8.150
meters. The width falls within the maximum allowable width designated for N2 areas
by clause 1.4.5 which is 12m.The recommendation is outlined in clause 1.4.2 which
deals with cyclonic and non-cyclonic areas.
ii) According to the plans, the building can be designed in the area. Clause 1.4.3 states
that the building should be of either rectangular, square or L-shapes, or a combination
of rectangular elements. From the plan, the building is a combination of 3 rectangular
shapes and therefore no restriction.
iii) Clause 1.4.4 limits the number of storeys to 2 and as such, the building is in a safe
position with 0 storeys.So yes, the building can be designed
iv) The maximum width of the building is 8.150 meters. Therefore, the building falls
within the maximum allowable width of 12.0 meters, as stipulated by clause1.4.5.
v) The section A-A indicates that the height of the wall can be obtained from 12.450 –
9.750 which equals 2700mm, the maximum height as stipulated by clause 1.4.6.
vi) Clause 1.4.7 recommends that the maximum rafter overhang should be 750
mm.Acccording to the drawing plans and approximations, the overhang can be
estimated by adding 380+250=630.The approximation falls within the required
maximum.
vii) The roof types recommended by clause 1.4.10 are: hip, gable.skillion.cathedral,
trussed, pitched or any suitable combination. According to the plans of the building,
the most suitable combination, according to the varying ridges and valleys, would be

that of a gable, hip and pitched roofs. The cathedral roofing system is suitable for the
patio.
Question 2
According to AS1684, clause 4.1.2, the standards stipulates that the material to be used for
the flooring system should be timber regardless of the species. Furthermore, the AS1684
outlines the practice design for timber floors but does not consider concrete anywhere. In line
with designing the building, it is not possible to use this standard because the building has a
concrete floor.
Question 3
A class S site refers to a place where the clay is slightly reactive and the ground movements
are minimal. As per BCA volume 2-2010 figure 5.2.3(a) and the table, the depth of a site S
edge beam for masonry veneer as well as articulated masonry veneer is 300mm.
Question 4
There are three specifications when it comes to the drainage specifications. BCA 2010
volume 2 clause 3.1.2.3 outlines the height of the slab above the finished ground level in:
areas of low intensity rainfall, impermeable surfaces and any other cases. In this scenario, the
most appropriate height is 150mm
Question 5
Fill may have been a necessity during the earth works and this is indicated by sharp
gradients as described by the contours. According to BCA volume 2 clause 3.1.1.4, filling
may be necessary where: fill is deeper than the existing soil level and for protection of the

footing system.Furthermore,fill is necessary for drainage of the area and as such, it cannot be
simply overlooked in this case.
Question 6
Controlled fill refers to material that has been placed and compacted in layers using
compaction equipment within a defined moisture range to a defined density while rolled fill
refers to material that has been placed in layers and compacted by continuous rolling by an
excavator.
kPa is a measurement unit that defines the ability of a material to withstand a force over a
specified area. It is used to define bearing pressure which is the strength of the soil and its
ability to withstand loads applied through the foundation.
The bearing pressure on which the slab edge beam is to be connected should not be less than
50kPa in natural soils. This is in accordance to clause 3.2.2.3 BCA volume 2
Question 7
The figure 3.2.5.3 of BCA volume 2-2010 resembles the external detail of the external wall
because of the construction methodology employed.Accordinmg to the figures, the
foundations is made up of internal and edge beams which are to ensure that the loads from
the load bearing walls are distributed appropriately into the ground
Question 8
A DPC is a membrane that prevents the penetration of water and moisture into a building.
The membrane forms a continuous barrier around the building, walls and piers below