The continuing tendency to use glass in internal and external applications ensures the pleasant appearance of buildings and removes the barrier between the building and the outside world. However, the glazed separators must in many cases meet the fire-fighting regulations relating to flame-retardation and the safe evacuation of the building users. Those requirements are very often met through the use of fire-resistant glass. PRESS GLASS offers PYROBELITE & PYROBEL fire-resistant glass manufactured by the Belgian firm Glaverbel. It is multi-layered glass, where the sheets of float glass are connected by means of intermediate layers made of gel, which expands under high temperature. During a fire, when the temperature rises to 120°C, the gel layers expand forming a hard, non-transparent layer, which temporarily prevents fire propagation.
Our products meet two basic criteria specified in building standards:
- fire-proof (class E), creating a barrier preventing the propagation of fire, smoke and gases to neighbouring areas, which are not on fire – the PYROBELITE – type glass;
- fire-insulation (class EI), creating a barrier preventing the propagation of fire, smoke and gases to neighbouring areas, which are not on fire, pre-venting the propagation of high temperatures, which ensures safe evacuation of people – PYROBEL – type glass.
The average temperature on the surface unaffected by flames ought not to rise by more than 140 °C above the ambient temperature. To be precise, the temperature ought not to exceed 180 °C.
In order to specify the time in which the glass meets the above requirements under the influence of fire, the glass classification symbol is supplemented with a numerical value indicating the time (in minutes), in which the fire-resistant glass meets the fireproof and the fire-insulation requirements.
The PYROBELITE and PYROBEL glass types have been tested in many countries against the local standards in force. Both glass types were also subjected to fire tests in Instytut Techniki Budowlanej (the Building Research Institute) in Warsaw, as a result of which they have received a number of Polish technical approvals. However, it must be remembered that in accordance with the generally applicable regulations, certifications are not issued solely for fire-resistant glass. The certifica-tions relate to complex glass systems and not to their par-ticular elements. The investor can not therefore demand a supplier to submit a document classifying a glass pane with respect to its fire-resistant properties. In order to obtain the certification, one must apply to the manufacturer or the supplier of system solutions.
On account of the fact that fire-resistant glass may be built in internally or externally as monolithic or double-glazed glass, the Glaverbel and PRESS GLASS offer includes glass types, which are quite different with respect to their construction. On ac-count of the fact that the gel binding of the glass is characterised by high sensitivity to UV radiation, the fire-resistant glass used externally must be secured by means of the PVB foil on the side of the glass most exposed to UV radiation.
It is assumed that in the case of the transparent external glass not having a safety layer in the form of the PVB foil, the fire-resistant glass for internal applications may be fitted within a minimum of 3.5 metres from that external glass.
- high level of light transmittance,
- full transparency,
- may be used as single or double-glazed glass,
- suitable for internal and external applications with an additio-nal UV filter,
- as glass for external use which is classified as safe glass that meets the requirements of the BS 6206 and EN 12600 standards,
- anti-burglary system,
- highly soundproof,
- has received a number of technical approvals.
PYROBELITE and PYROBEL may be used where required by building regulations and where natural lighting and transparency are the key factors. The following places are suitable for application:
- hospitals and laboratories,
- schools and offices,
- hotels and restaurants,
- theatres and museums,
- shopping centres and underground stations,
- banks, etc.