BS EN 12758:2011 pdf download

BS EN 12758:2011 pdf download.Glass in building -Glazing and airborne sound insulation – Product descriptions and determination of properties.
4.3.4 Coated glasses
These are glass panes that have been coated and are in accordance with EN 1096-1
NOTE Coated glass may be manufactured from any of the glass types referred to Ii 4.1,4,2,431.4.3.2 or 43.3.
4.3.5 InsulatIng glass units (IGU)
These are hermetically sealed insulating glass units, containing air or other gas, that are in accordance with
EN 1279-1.
NOTE An IGU may be manufactured from any of the glass types or coird,ination of the glass types referred to In 4.1,
4 2.4.3.1.4.3,2, 4.3.3 or 4.3.4.
5 Test methods
5.1 General
Acoustic performance data shall be obtained under the conditions specified by EN ISO 10140 and
EN ISO 717-1. For laminated glasses, owing to temperature dependency, the speornen temperature shall be
(21 ± 2)C.
NOTE 1 For best reproduobility it is recommended that the test opening for glass penes, as descnbed in EN ISO 10140. be adopted.
Some variation in panel size, etc.. to those in EN ISO 10140, may be necessary for the testing of glazed assemblies, i.e. glass blocks, paver units, channel shaped glass, structural sealant glazing and structural assemblies in order to include a valid representation of all their features. Acoustic measurements of the performance of these products shall be made on assemblies or a-rays of them, and not on individual elements. Factors which influence testing are size, jointing. etc.
NOTE 2 Fci lerge mixed components it may be more appropriate to employ intensity measurement techniques, acoordrg to the advice of a speciist
Test reports on the sound insulation of glazing shall be obtained from measurements made under the conditions specified In EN ISO 10140 or. as closely as possle, for some unconventional glass products or assemblies, as acknowiedged above. In all cases, constructional details shall be included. with statements. where appropriate, of:
a) type of glass:
b) glass thickness(es);
c) airspace(s)/cavity width(s):
d) gas filling – type and concentration;
a) for laminated glass, glass 1 plastics glazing sheet matenals I Interlayer build up – type, thickness(es) and number:
I) for laminated 91855. the specimen temperature:
NOTE The wire mesh within wired glass has no influence on the acoustic performance.
5.3.3 Laminatedillaminated safety glass
Laminated glass using an inorganic interlayer can be described acoustically by the data for a single glass of the same overall thickness
NOTE I If data for a single glass of the same thickness is not available. then use the data for the next available lower thickness
• Data for a glass product including laminated glass using orgarwc acoustic interlayer may be adopted for a glass
product including laminated glass using another acoustic interlayer as long as the measured loss factor of the 1
mode of the beam of both Interlayers are equal to or greater than 0.20. when measured in accordance iwth
ISO 16940
• Data for a glass product including laminated glass using an Intertayer may be taken for a glass product including laminated glass using another Interlayer as long as the meannd loss factor of the 1” mode of the beam Is equel to or greeter than that of the initial interlayer measured in accordance with ISO 16940.
• Thicknesses of laminated/laminated safety glasses are given In accordance *4th EN ISO 12543-5. NOTE 2 The construction of a laminated glass should be known.
&3.4 Coated glasses
• The application of a coating. In accordance with EN 1096-1, or thin film, will have no effect on the acoustic description of the glass substrate from which it was manufactured,
• A paint, silver (mirrors) or enamel coating can be treated as any other coating. &35 Insulating glass units
• The measured data for an air-filled or argon-filled IGU can apply to all IGUs, irrespective of being air-filled or argon-filled, for the same glass composition.
• The data for IGUs including organic sealants can be adopted for any other organic sealants.
• The same rule applies for spacers of the same width.
6 Sound insulation rating and classification
6.1 Sound insulation rating
The octave band values may be derived from third-octave-band data,
Proper evaluation of these parameters depends on the corresponding basic sound insulation data. i.e. SRI values, being obtained from measurements, in accordance with EN ISO 10140.
6.2 Statement of acoustic performance of glass.