Download every glazier building inspector must know glass

Introducing:
I
South African Glass Institute
South African Glass & Glazing Association
HAT
EVERY GLAZIER
AND
BUILDING
INSPECTOR
MUST KNOW
ABOUT
GLASS
INSTALLATIONS
&
PRODUCTS
. . .
TM
Note!
l All previous issues are
hereby superseded.
New Nomenclature
Old
New
SABS 0137
SANS 10137
SABS 0160
SANS 10160
SABS 0400
SANS 10400
SABS 1263
SANS 1263
Group
The contents of this brochure are abridged AAAMSA guidelines.
For further detailed information consult the
AAAMSA GENERAL SPECIFICATIONS and SELECTION GUIDES.
©AAAMSA/SAGGA - February 2005
À
À
D E T E R M I N AT I O N O F G L A S S F I N D I M E N S I O N S
SANS 10137 - The installation of glazing in buildings
Quote:”
7.14.2 Butt jointing edges
Where glass panes in the same plane are butt-jointed without fins, they will not have the same wind
resistance characteristics as a single pane of the same overall size and thickness. The thickness of such
glass should be calculated on the assumption that the butt joint does not have any structural effect, i.e.
the surround will be the only support.
If reinforcing is unavoidable due to the span and wind loading, it might be necessary to install fins attached
to the structure at the butt joints as indicated below. A suitable adhesive sealant with sufficient bonding
strength to allow movement due to wind loading shall be used.
Silicone sealants that have a tensile strength of at least 1 Mpa are regarded as suitable for this purpose.
Fins would normally be installed on the inside of the building where there is likely to be less pedestrian
traffic. Fin selection is covered in figures 39, 40 and 41.
“Unquote.
Glass Fin Dimensions
Refer notes at bottom of page.
Category
Wind Load
A0*
600 Pa*
Fin height in m
A1
1000 Pa
A2
1500 Pa
A3
2000 Pa
Fin Dimensions, Width x Thickness in mm
1,5
150 x 12
150 x 12
150 x 15
STE
2
150 x 12
150 x 12
150 x 19
STE
2,5
150 x 12
175 x 15
175 x 19
STE
3
175 x 15
200 x 15
200 x 25
STE
3,5
225 x 15
250 x 19
275 x 25
STE
4
275 x 15
275 x 19
300 x 25
STE
4,5
5
350 x 15
375 x 19
350 x 19
350 x 25
STE
STE
STE
STE
*Also applicable to internal glazing.
STE = Subject to Enquiry
Thickness
Width
Glass
Fin
Glass Fin
Silicone Sealant
Not allowed
Fins NOT
secured to Structure
Glass Fin
Allowed
Fins secured to
Structure
3mm
Glass Pane
Glass Pane
Silicone Sealant
3mm
Notes:
The above table has been based on Figure 40 and 41 of SANS 10137 for a Fin Height/Main pane width Ratio of 1.0 or less.
The SANS 10137 recommends :
1) A minimum windloading of 750 Pa is used for the determination of glass fin dimensions for internal and external applications.
2) A minimum glass fin width of 150 mm.
3) Glass fin thickness of 12, 15, 19 or 25 mm
Any deviations from the above are to be approved in terms of SANS 10400 by a duly appointed competent person in writing for each
individual contract.
©AAAMSA/SAGGA - February 2005
SELECTION OF GLASS DIMENSIONS
SANS 10400-1990 - Part N Glazing
Quote:”
NN2 Installation of Glazing
NN2.1 In any vertical glazing installation, any pane of glass and the fixing of such pane shall comply with the following requirements:
(a) Where such pane is to be exposed to the effect of wind, the thickness of such pane in relation to its area shall be in accordance
with SANS 10137.
(b) Such pane shall be fixed in the frame in accordance with any suitable method described in SANS 10137 and such frame shall
be so installed that it is capable of sustaining the total wind load for which such pane was designed.
(c) Notwithstanding the requirements of paragraph (a), the nominal thickness of a pane of glass shall be not less than that given
in Table 1.
TABLE 1 - GLASS DIMENSIONS
1
2
Note ! This table applies
Note ! This table not only
2
to glass panes having Nominal glass thickness, mm Maximum size of pane, m
applies to non-safety
3
0,75
all round support.
glass but applies to
4
1,5
safety glass as well.
5
2,1
6
3,2
“Unquote.
The above is currently under review. It is expected that the revisions will be published end 2005. The status quo thus remains and
Table 1 (above) applies in all instances where no rational glass design has been made. Table A-D (below) will only come into effect
end 2005 when the new Part N is published.
Any deviations from the Table 1 must be approved in terms of SANS 10400 by a duly appointed Competent person in
writing for each individual contract. Recommendations made by Competent Persons (Glazing) appointed by the South
African Glass Institute must be included with any SAGGA Certificate of Conformance.
Table A:
Dimensions for vertical glass supported in a frame supported all round in external walls in buildings
where the height measured from the ground to the top of such wall does not exceed 10 metres.
Maximum pane area, m2
Nominal glass thickness in mm
3
4
5
6
8
10
12
0.75
1.5
2.1
3.2
4.6
6.0
6.0
Patterned Annealed & Wired Glass
-
0.75
1.2
1.9
2.6
3.4
-
Laminated Annealed Safety Glass
-
-
-
2.9
4.3
5.7
5.7
Toughened Safety Glass
-
1.9
3.0
4.5
8.0
8.0
8.0
Monolithic Annealed Glass
Table B:
Dimensions for vertical glass supported in a frame all round in internal walls.
Maximum pane area, m2
Nominal glass thickness in mm
3
4
5
6
8
10
12
0.75
1.5
2.1
3.2
4.6
6.0
6.0
Patterned Annealed & Wired Glass
-
0.75
1.2
1.9
2.6
3.4
-
Laminated Annealed Safety Glass
-
-
-
4.1
6.0
7.2
7.2
Toughened Safety Glass
-
3.0
4.2
6.4
9.2
9.2
9.2
Monolithic Annealed Glass
Table C:
Dimensions for vertical glass supported in a frame on two opposite sides in external walls in buildings where
the height measured from the ground to the top of such wall does not exceed 10 metres.
Maximum span in metres
Nominal glass thickness in mm
3
4
5
Monolithic Annealed Glass
Patterned Annealed & Wired Glass
-
0.4
-
0.25
Laminated Annealed Safety Glass
-
Toughened Safety Glass
-
Table D:
6
8
10
12
0.5
0.6
0.85
1.0
1.3
0.3
0.35
0.5
0.6
-
-
-
0.55
0.8
0.95
1.2
0.55
0.7
0.85
1.15
1.3
1.8
Dimensions for vertical glass supported in a frame on two opposite sides in internal walls.
Maximum span in metres
Nominal glass thickness in mm
3
4
5
6
8
10
12
Monolithic Annealed Glass
-
0.65
0.8
0.95
1.3
1.55
2.0
Patterned Annealed & Wired Glass
-
0.4
0.48
0.57
0.78
0.9
-
Laminated Annealed Safety Glass
-
-
-
0.9
1.25
1.5
1.95
Toughened Safety Glass
-
0.9
1.1
1.3
1.75
2.0
2.7
©AAAMSA/SAGGA - February 2005
Re p re s e nt ing
P.O.Box 7861, Halfway House 1685
Tel: (011) 805-5002
Fax: (011) 805-5033
E-mail: [email protected]
[email protected]
Associations Aims:
Corporate Members
To be the Professional Organisation within South Africa which is Uniquely Committed to the Disciplines & Standards
of Quality which surround the Manufacture & Installation of Architectural Aluminium Products, Interior Building Systems,
Glass and Glazing, Building Insulation & Associated Activities. To provide a Forum for the Exchange of Expertise &
Interaction between Individuals & Organisations to Create a Competitive Advantage for the Architectural Aluminium,
Glass & Insulation Industry. To communicate to all Stakeholders in the Architectural Aluminium Industry the Register
of Accredited Members of AAAMSA who have Satisfied the Associations’s Requirements of Predetermined Standards