Welcome back to Buildsum and in this video which is the seventh video in the series on
AS1694.2 the Timber Framing Code, we're gonna have a look at some of the definitions
in the act and or in the code and
How they apply
So the first definition is a Load-bearing wall
Which is a wall that supports roof or floor loads or both roofs or floor loads so anything that takes load
is a load-bearing wall a
Non load-bearing wall so an external one
It supports neither that roof or floor loads, but may support ceiling loads and can also act as a bracing wall
non load-bearing external wall may support lateral when loads so it could be a gable or
a skillion end wall a
non load-bearing wall internally
Supports neither roof nor floor loads, but may support ceiling loads and it can also act as a bracing wall
So there's the definition for a non load-bearing wall
The Regulatory Authority is
Authorized by legal statute as having justification to approve the design and construction of a building or
Any part of the building design or construction process
So just a note there in the context of this standard the regulatory authority may include local council
building surveyors private building surveyors or other persons nominated by the appropriate state or territory
Building legislation as having the legal responsibility for approving
the use of structural timber products a
Coupled roof a coupled roof is a pitched roof construction
With a roof slope. That is not less than 10 degrees
It has ceiling joists and collar ties fixed
to the opposing common rafter pairs and a ridge board at the apex of the roof
The coupled roof system may include some area where it is not possible to fix ceiling joists or Collar ties
to all right as for example hip ends or part of the T and L-shaped building, so there is
basically a coupled roof ceiling joists and
Collar ties for the majority of the construction a
Non coupled roof is again a pitched roof
that is not a coupled roof and includes cathedral roofs and roofs constructed using ridge and
intermediate beams
So basically no ties in between such as a cathedral roof. It's a non coupled roof
Pitched roof, a roof where members are cut the suit and which is erected on site, that's the codes definition of a pitched roof
truss roof is an engineered roof frame system designed to carry the roof or roof and
ceiling usually without the support of internal walls
There's a truss
Spacing spacing is a center to the center distance between structural members unless otherwise indicated
Span the face-to-face distance distance between points capable of giving full support
To structural members or assemblies in particular rafter spans are measured at the distance between points of
Support along the length of the rafter and not the horizontal projection of this distance
Single span
span of a member supported at or near both ends with no intermediate supports, so
This case that's a single span from there to there in the case of this member it includes the case where members are partially cut
through
over intermediate supports to remove spring
So if this was one continuous member and for some reason you had to cut it fully or partially
it becomes two single spans
Continuous span however applies to members support it at or near both ends, and it has one or more intermediate points
Such that no span is greater than twice the other
So you can see that this member is continuous over one or more supports?
That's a continuous span
Stress grade
classification of timber to indicate for the purposes of design a set of structural design properties
in accordance with AS 1720.1
Stud height is the distance from the top of
the bottom plate to the underside of the top plate or the distance between points of
Lateral restraint provided to both the breadth and depth of the stud
So there's stud height
Two storey
in any section through the house
Construction that includes not more than two levels of timber-framed trafficable floor
Trafficable floors in attics and lofts are included in the numbers of stories in
the subfloor of a two-story construction the maximum distance
the ground to the underside of the lower floor bearer is
1,800 millimeters
Rim board is a member at right angles to and
fixed to the end of deep joist including I joists like here that
Provides restraint to the joists so this rim board gets fixed on the end of the joist that stops them from falling over
And
An over batten battens shall be a minimum of 35 x 70
F5 stress grade so no the Batten sits on top of your ceiling joists
And there we go that's some of the definitions that are commonly used in the Timber Framing Code