- 25
- May
double fire exit doors,BS emergency door exit,emergency exit door alarm
The fire endurance of Class B fire door shall not be less than 0.9h. During the installation of fire doors, fire sealant strips will be added at each gap, which can effectively prevent harmful gases from floating outside the door.
https://ztfiredoor.com/18461.html
BS emergency door exit,emergency exit door alarm,fire rated exit door,double fire exit doors,fire exit door alarm,BS emergency door exit,steel fire exit,emergency exit door alarm,steel fire exit doors,double fire exit doors,emergency exit door,BS emergency door exit,emergency egress door,emergency exit door alarm,door fire exit,double fire exit doors