MB-SR50N EI Mullion-transom Fire-resistant Curtain Wall

The MB-SR50 EI and MB-SR50 EI curtain wall fire rated systems have been developed to provide a light-weight curtain & fire resistant wall, of classes EI 15, EI
30, EI45, EI 60 classes according to PN-EN 1364-3 and PN-EN 1364-1 and of fire-resistant glass-covered roofs. The system is classified as non-fire spreading (NRO).
These solutions use profiles of the basic, MB-SR50 and MB-SR50N façade systems: mullions of a depth of between 85 and 225 mm and transoms of a depth of
65+ 189,5 mm. Both systems are linked technologically and functionally, the main difference between them lies in the shape and depth of the profiles: rounded
profiles with a radius of 2.5 mm characteristic of the MB-SR50 are replaced by the “sharp edge” in the MB-SR50N system. This affects substantially the aesthetics
of the structure – the MB-SR50N system design is such that, like size transoms & mullions will provide a flush internal finish of the “box aspect” of the profiles,
creating a desirable, unified grid appearance. This allows the glazing building to be a unified-looking grid.
The design of the fire rated curtain wall system allows the use of angled connections to ± 7.5° per side, angled connections 90° or 135° (internal or external) and
building façades tilted from the vertical at an angle of ± 15°. It is also possible to install the MB-78EI fire doors while maintaining the fire resistance of the whole
structure in classes EI 30 or EI 60.