The ALT FR76 doors are manufactured with the use of special five-chamber profile, and are indented to use as a fire resistant system:
Innovative five-chamber profiles consisting of 3 aluminium ™parts™ and connected with two pairs of thermal breaks have been designed specially for ALT FR76 system. The mounting depth of profiles is 76 mm. The possibility to install the infill units from 10 up to 48 mm allows to achieve high thermal and soundproof characteristics.