Rapid rolling door Rapid door High-speed shutter fire rating is introduced
According to the fire rating
According to the GB14102 steel roller shutter quickly Rapid door Conditions of high speed rolling door in ordinary steel shutter is divided into:
Level 1, refractory time 1.50 h
F2, refractory time 2.0 h
The composite steel shutter is divided into:
F3, refractory time 2.50 h
F4, refractory time 3.00 h