Residential Timber-Framed Construction: AS1684.4 Guidelines

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RESIDENTIAL TIMBER – FRAMED CONSTRUCTION
Student’s Name
Course Name
Date

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Floor framing - AS1684.4
Q
No Answer Reason or Explanation
1i Suitable The house is to be built in a city square whose perimeter has an
estimate of over 250,000 m2 of an open field.
Ii Suitable The plan layout is partly L-shaped and rectangular which is
within the flexible limits for timber-framed construction
Iii Single and two storey Depending on the timber strength, it can only support the
maximum load of a two story building.
Iv Suitable The width is less than 16000mm which is maximum
V Suitable The wall height is within the maximum range of 3000mm
Vi Suitable The hanging rafter is within the required limits
Vii Suitable Roof pitch is 30⁰ which is within the maximum limit of 35⁰
2 Yes
The site has such topography that is able to support the structure,
the floor span is also within the maximum span for timber floor
construction, hence within the deflection limits
3 450mm
4 300mm. Reference from the BCA
5 No requirement for filling Suspended floor can be employed in the construction, hence pad
foundation can be used for construction.
6 50kPa,
Controlled fill is where a tested
material imported to the site or
found on site is placed in layers of
150mm, the moisture content is
regulated by adding water using a
compaction equipment1.
A rolled fill is an embankment of
the earth or rocks where the
material is placed in layers and
compacted using rolling
equipment. KPa is a unit for
1 Allen, Edward, Rob Thallon, and Alexander C. Schreyer. Fundamentals of residential construction. John Wiley &
Sons, 2017.

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measuring pressure. Allowable
bearing pressure is the maximum
stress that can be applied on a
foundation such that it is able to
withstand the shear failures.
7 Diagrams 3.2.5.4
In compliance with the BCA, an external wall should be non-
combustible and if made of a combustible material then it should
be in accordance with certain fire hazard properties so as to be
treated as an attachment2.
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A DPC is a barrier that prevents
moisture from penetrating
through a structure by capillary
action through the rising damp
phenomenon3.
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Thin material pieces of
impervious materials that are
installed to prevent water passage
through and into a structure
10 Windows, vent pipes, roofs walls,
door openings
2 Dakin, Anthony. "Investigation of the suitability of finger jointed structural timber for use in nail plated roof
trusses." (2011), 240.
3 Aktaş, Yasemin Didem, Uğurhan Akyüz, Ahmet Türer, Barış Erdil, and Neriman Şahin Güçhan. "Seismic resistance
evaluation of traditional Ottoman timber-frame Hımış houses: frame loadings and material tests." Earthquake
Spectra 30, no. 4 (2014), 1721.

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Typical flashing detail
11 Size of floor Framing Members - identify the location of timber stumps, bearer, joists
and the ledger on the plan below.