This video from the 2022 NCC Seminars discusses Part H1D8 Glazing from NCC 2022 Volume Two.
My name is Phil Finnimore, from the Australian Building Codes Board and today I'm going
to be talking about some changes to the Deemed-to-Satisfy provisions for glazing.
H1D8 is the relevant Deemed-to-Satisfy provision in Volume Two which will give you the choice of
using either the Deemed-to-Satisfy solution through reference documents which is AS 1288
for glass size and safety glass, glass selection or AS 2047 which covers the installation and
manufacture of separate windows. The Housing Provisions Standard on the left there takes
you directly to part eight where the rest of the Deemed-to-Satisfy provisions will
exist in the Housing Provisions in detail. Looking at a comparison between 2019 and 2022,
on the left there for 2019 Part 3.6 what we've done is tidy up the numbering, that you can see
there, from Part 3.6.1 that ended up with the number in 184.108.40.206 visibility of glazing we've
tidied up and grouped the particular requirements in 2022. Set out there we've got an application
clause that's Part 8.1 we separated windows and glazed doors into a Part 8.2, we've separated also
glass, glass sizing and installation provisions in Part 8.3 and human impact requirements in Part 8.4.
So having a look at H1D8 which is the Volume Two Deemed-to-Satisfy provision for glazing. Part 8.2
is the relevant part of the Housing Provisions that you will go to for your solutions if you
choose that Deemed-to-Satisfy pathway. Noting here in H1D8(1)(b)(ii), Part 8.2 you can comply with or you can
use those provisions provided they're in buildings with geometric limits set out in clause 1.2 of
AS 4055 that's the wind loading code for housing. Put this slide in there to note that there are
a limitation if you're using these Deemed-to-Satisfy provisions that you're building must be
within the design parameters or the geometric limits set out in that particular standard.
8.2.2 is a new part a new clause in the Housing Provisions for 2022
and it's really just stating that if you are installing windows, no loads would
be to be transferred to them they're not load-bearing elements, there's minimum gaps
around the window, there's requirements there if necessary to ensure that frames have packers to
make sure that they're kept straight and separate from the rest of the structure.
Supporting this particular clause is a very simple diagram one that you'll find in any
glazing manufacturer's information and it just is explaining the location of packers and some
common sense things relating to keeping fixings and windows straight and plumb and away from
anything that's load bearing such as rafters or floor joists or trusses whatever the case may be.
Some of the tables in the Housing Provisions that currently exist in 2019 have changed, and the only
part of them have changed mainly in the higher wind speeds of N3 other thicknesses, this
particular table we've left the track changes in there to show you that there have been some
slight increases in the larger window sizes for the higher wind speeds and their thicknesses
have gone up slightly, but noting also that some of these thicknesses have actually been reduced
and the reason this has been the case is because of the review of AS 4055 the wind loading code.
Still on glazing we've extended the requirement for splashbacks that are made of glass in the
bathrooms, ensuite we have provisions in 2019 that say if you have a mirror or a splashback that's
made of glass in those particular areas provided you've got a barrier in front of it it's okay to
use ordinary anneal glass because the splashbacks are being used in kitchens nowadays we've expanded
that particular clause into kitchens as well. So there are now Deemed-to-Satisfy requirements
permitting the use of glass splashbacks in kitchen areas provided you still maintain those particular
barrier dimensions, which would basically be the formation of cupboards in front of them.
Something that's been uplifted and put into the Housing Provisions for 2022 it's always
existed in 1288 the Australian Standard for glass and it's something that's always had
to be complied with but we've put it into the Housing Provisions so that it's upfront and
in one place and that's a requirement for the identification of safety glass.
There's explanatory information there that will give you some clues as to
how to meet the requirements there in 8.4.8 in particular subclause (b)