G'day and welcome back to Buildsum and a little bit of a change, I'm going to start a series of videos
covering the Australian Standard 1684 Timber Framing Code and in particular
concentrating on 1684.2 which is for non cyclonic areas which is applicable for where I live
So basically the timber framing code is a standard which is
there to provide our building industry with procedures that can be used to determine
building practice and to design or check construction details and to determine member sizes
bracing and fixing requirements for timber framed construction in non cyclonic areas, so
in this day in age it's not very common practice for a builder to design
every element of the frame, but if you ever had to put a beam in for a renovation
or you just weren't sure about something you could use the timber framing code
To work it out
There are a few companion documents to the timber frame code as I said we're going to concentrate on part two
But there is also
Part 1 which is design Criteria
Part 3 which is for cyclonic areas and
Part 4 which is simplified non cyclonic areas. It's just not as specific as what Part 2 is
along with the actual code itself there are a lot of supplements and
These are the actual tables that have all the spans
that the different timbers can can achieve
So you'll notice they're broken up into wind speeds so N1 and N2 wind speeds
There are 15 supplements covering F5 through to F27
seasoned and
unseasoned timber and it also includes MGP10 12 and 15
grading as well and
we have the same for N3
Wind speeds so another 15
again
all the F8 stress grades and the MGP stress grades
And we also have the same for N4
So it's quite a few supplements that go along with the actual
Act itself
the act is broken up into a few different sections the first one being Scope and General, so it covers
you know it looks at what the actual act covers
It looks at any companion documents and anything that was referenced
to get the information for this for this document
It looks at the limitations what it you know, what doesn't cover and how far it does cover
I'll look at that in a separate presentation
It looks at there's design Criteria the forces on the building
That I can take it into consideration
talks about load paths offsets and cantilevers
It looks at the durability of the timber it talks about how the act
measures dimensions
It talks about bearing of timbers and again the stress grades
it also looks at engineered Timber products and
engineered Wood products
talks about tolerances, so how
Far above or below a
given
dimension can you be
alternative dimensions and steel grade and corrosion protection
also looks atconsiderations for design under the standard and interpolation, so that's the first section
the second section
looks at has a general section looks at terminology of the framing members, so
Actually shows you what members what they call each member
So you get the correct terminology when you read the code looks at vertical Lamination and stud lamination
Also looks at the horizontal Lamination for wall plates only
Looks at our load widths and the area supported and again
We'll do I'll do separate demonstrations or videos on those and it also has some definitions in General
So that gives you the bit of an idea of what's what they're saying in the in document
Again section 3 looks at the substructure of the building to site preparation and drainage ground clearance
Subfloor ventilation durability
substructure bracing
subfloor supports footings and supports for wind classifications N1 and N2 it's all covered in Section 3
Section 4 we start getting into our framings that looks at floor framing
Most of the framing areas are broken up into these three areas. So you have just general information
You have the .2 in this case 4.2
section which is about how you use or how the members are used and then 4.3 covers and
Directs you to the table the correct table to get the member size
Okay, so that's for floor framing Section 4
Section 5 looks at flooring and decking
So it looks at platform floors fitted floors
Expansion joints laying in fixing wet area floors joist spacing in the flooring and it also looks at decking
Section 6 again looks at wall framing, but it's just split up the general building practice
So you know how the members are used and then member sizes at what size they actually going to be where to find it
roofing similar in Section 7
general Building practice and member sizes and
Then we get into our racking and shear forces so looking at the bracing
So again a general section then it looks at temporary bracing
How much you need and then it will looks at wall and subfloor bracing how to work that out
how much bracing you need in your building and
Then Section 9 it looks at the fixings and tie-down requirements
so again general connected then General connection requirements
procedure a flow chart
9.4 nominal and specific fixing requirements
Okay, then we look at 9.5 normal fixings on minimum fixings
Then specific tie-down fixings, and then we look at shear forces in Section 9
And then we have all the appendices, so there's quite a few
A - being typical construction, mass, B -looking at durability, C - looking at interpolation
D - looking examples of a foundation bearing area and even
distribution of bracing
E - Looking at Moisture content and Shrinkage
F - looks at racking forces and alternative procedures, G - looks at timber species and properties
H - looks at storage and handling and materials, I - looks at collar ties
with multiple rows of Purlins and
J - looks at building practices for engineered wood products
and
The bibliographies at the end. So there you go that is a quick overview of
the
Australian Standard 1684.2
In subsequent videos I will drill down
deeper into what we've just looked at and eventually I'll show you how to work out
how to work out the size of the members that you need