2022 NCC Seminars: Volume Two - Glazing

0:00

[Music]

0:09

My name is Phil Finnimore, from the Australian Building  Codes Board and today I'm going  

0:14

to be talking about some changes to the  Deemed-to-Satisfy provisions for glazing.

0:21

H1D8 is the relevant Deemed-to-Satisfy provision  in Volume Two which will give you the choice of  

0:28

using either the Deemed-to-Satisfy solution  through reference documents which is AS 1288  

0:33

for glass size and safety glass, glass selection  or AS 2047 which covers the installation and  

0:41

manufacture of separate windows. The Housing  Provisions Standard on the left there takes  

0:48

you directly to part eight where the rest  of the Deemed-to-Satisfy provisions will  

0:52

exist in the Housing Provisions in detail. Looking at a comparison between 2019 and 2022,

1:00

on the left there for 2019 Part 3.6 what we've  done is tidy up the numbering, that you can see  

1:07

there, from Part 3.6.1 that ended up with the  number in 3.6.4.6 visibility of glazing we've  

1:15

tidied up and grouped the particular requirements  in 2022. Set out there we've got an application  

1:21

clause that's Part 8.1 we separated windows and  glazed doors into a Part 8.2, we've separated also  

1:29

glass, glass sizing and installation provisions in  Part 8.3 and human impact requirements in Part 8.4.

1:39

So having a look at H1D8 which is the Volume Two  Deemed-to-Satisfy provision for glazing. Part 8.2  

1:50

is the relevant part of the Housing Provisions  that you will go to for your solutions if you  

1:55

choose that Deemed-to-Satisfy pathway. Noting here in  H1D8(1)(b)(ii), Part 8.2 you can comply with or you can  

2:05

use those provisions provided they're in buildings  with geometric limits set out in clause 1.2 of  

2:12

AS 4055 that's the wind loading code for housing. Put this slide in there to note that there are  

2:18

a limitation if you're using these Deemed-to-Satisfy provisions that you're building must be  

2:23

within the design parameters or the geometric  limits set out in that particular standard.

2:30

8.2.2 is a new part a new clause  in the Housing Provisions for 2022  

2:37

and it's really just stating that if you  are installing windows, no loads would  

2:42

be to be transferred to them they're not  load-bearing elements, there's minimum gaps  

2:48

around the window, there's requirements there if  necessary to ensure that frames have packers to  

2:54

make sure that they're kept straight and  separate from the rest of the structure.

2:58

Supporting this particular clause is a very  simple diagram one that you'll find in any  

3:04

glazing manufacturer's information and it just  is explaining the location of packers and some  

3:10

common sense things relating to keeping fixings  and windows straight and plumb and away from  

3:19

anything that's load bearing such as rafters or  floor joists or trusses whatever the case may be.

3:26

Some of the tables in the Housing Provisions that  currently exist in 2019 have changed, and the only  

3:32

part of them have changed mainly in the higher wind speeds of N3 other thicknesses, this  

3:40

particular table we've left the track changes  in there to show you that there have been some  

3:44

slight increases in the larger window sizes for  the higher wind speeds and their thicknesses  

3:52

have gone up slightly, but noting also that some  of these thicknesses have actually been reduced  

3:57

and the reason this has been the case is because  of the review of AS 4055 the wind loading code.

4:05

Still on glazing we've extended the requirement  for splashbacks that are made of glass in the  

4:12

bathrooms, ensuite we have provisions in 2019 that  say if you have a mirror or a splashback that's  

4:19

made of glass in those particular areas provided  you've got a barrier in front of it it's okay to  

4:25

use ordinary anneal glass because the splashbacks  are being used in kitchens nowadays we've expanded  

4:31

that particular clause into kitchens as well. So there are now Deemed-to-Satisfy requirements  

4:36

permitting the use of glass splashbacks in kitchen  areas provided you still maintain those particular 

4:42

barrier dimensions, which would basically be  the formation of cupboards in front of them.

4:49

Something that's been uplifted and put into  the Housing Provisions for 2022 it's always  

4:55

existed in 1288 the Australian Standard for  glass and it's something that's always had  

5:00

to be complied with but we've put it into the  Housing Provisions so that it's upfront and  

5:05

in one place and that's a requirement  for the identification of safety glass.

5:09

There's explanatory information there  that will give you some clues as to  

5:13

how to meet the requirements there  in 8.4.8 in particular subclause (b)