EN 15681-2-2017 pdf download.Glass in Building-Basic alumino silicate glass products Part 2 : Product standard.
4.2.2 Determination of the characteristics of basic alumino silicate glass products
4.2.2.1 General
If the basic alumino silicate glass products manufacturer wishes to claim that any performance characteristic is independent of the production equipment used, then the factory production control system shall be in accordance with this document including his specific process control conditions.
4.2.2.2 Safety in the case of fire- Resistance to fire
Fire resistance shall be determined and classified in accordance with EN 1350 1-2.
The testing methodology specified in EN 15998 shall be used for glass products that are claiming fire resistance.
4.2.2.3 Safety in the case of fire – Reaction to fire
Reaction to fire shall be determined and classified according to EN 13501-1.
Basic alumino silicate glass products are products/materials that do not require to be tested for reaction to fire (e.g. Products/materials of Classes Al according to Commission Decision 96/603/EC, as amended 2000/605/EC).
4.2.2.4 Safety in the case of fire – External fire performance (for roof coverings only)
Where the manufacturer wishes to declare external fire performance (e.g. when subject to regulatory requirements), the product shall he tested and classified in accordance with EN 13501-5.
4.2.2.5 Safety in use – Bullet resistance: shatter properties and resistance to attack
Bullet resistance shall be determined and classified in accordance with EN 1063.
4.2.2.6 Safety in use – Explosion resistance: impact behaviour and resistance to impact
Explosion resistance shall be determined and classified in accordance with EN 13541.
4.2.2.7 Safety in use- Burglar resistance: shatter properties and resistance to attack
Burglar resistance shall be determined and classified in accordance with EN 356.
4.2.2.8 Safety In use – Pendulum body Impact resistance: shatter properties (safe breakability) and resistance to impact
Pendulum body impact resistance shall be determined and classified in accordance with EN 12600.
4.2.2.9 Safety in use – Mechanical resistance: Resistance against sudden temperature changes and temperature differentials
The resistance against sudden temperature changes and temperature differentials is a generally accepted value that is given in EN 15681-1 and shall be ensured by compliance with this standard.
4.2.2.10 Safety in use – Mechanical resistance: Resistance against wind, snow0 permanent load and/or imposed loads of the glass unit
The mechanical resistance of basic alumino silicate glass products is a characteristic value that shall be ensured by compliance with this document
The value to be declared is the characteristic bending strength, as defined in EN 15681-1:2016, 5.2.
As long as prEN 16612 is not applicable for the glass design with respect to the concerned construction or building site, then the current method of determining mechanical resistance in the country of destination shall be applied.
4.2.2.11 Protection against noise – Direct airborne sound reduction
The sound reduction indexes shall be determined in accordance with EN 12758.
The values to be declared shall be rounded down to the nearest whole number.
4.2.2.12 Energy conservation and heat retention – Thermal properties
The thermal transmittance value (U-value) shall be determined in accordance with the following procedure:
a) The emissivity shall be taken equal to 0,837k as given in EN 15681-1
b) The U-value shall be determined by calculation in accordance with EN 673, with the normal emissivity as defined above and the nominal thickness of the glass panes.
4.2.2.13 Energy conservation and heat retention – Radiation properties: Light transmittance and reflectance
The light transmittance and light reflectance shall be determined either:
a) in accordance with the following procedure:
4.2.2.14 Energy conservation and heat retention – Radiation properties: Solar energy characteristics
The solar direct transmittance, the solar direct reflectance and the total solar energy transmittance (solar factor or g-value) shall be determined either:
a) In accordance with the following procedure:
1) The solar direct transmittance and solar direct reflectance of one sample of basic alumino silicate glass product shall be determined in accordance with EN 410 and Annex B. The exact thicknesses of the glass shall be measured.
2) The solar direct transmittance, the solar direct reflectance and the total solar energy transmittance (solar factor or g-value) of any other thickness shall be calculated according to
EN 410.
3) The tool used to calculate the solar direct transmittance, the solar direct reflectance and the total solar energy transmittance (solar factor or g-value) shall be validated.
b) or measured following EN 410 and Annex B.
The tolerances on the calculated solar energy characteristics are given in Annex B.
4.2.2.15 DurabilIty / Conformity with the definition of basic alumino silicate glass products
Products shall conform to the definition, to the manufacturer product description and fulfil the
requirements of basic alumina silicate glass products as defined in EN 15681-1.
The type testing concerns the product aspects as listed in Table 2.EN 15681-2-2017 pdf download.

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