Fire Rated Door Threshold Detail

Commercial fire rated door requirements are typically determined by the fire rating of the wall and use of the door.

Fire rated door threshold detail.

Bs9999 2008 recommends for fire doors with cold smoke control that the threshold gap should be either less than 3mm in height or should be fitted with a threshold seal. This publication contains explanations and details of louver designs that are most commonly available within the standard door industry. I treat the threshold as part of the sill assembly. And we are certified by ul to cut re certify and label fire rated glazing materials.

Trudoor is an authorized whi fire labeled shop warnock hersey intertek enabling us to modify re certify and label fire rated doors and frames. Our facility undergoes routine inspections to verify that modifications are. For example nfpa 101 currently requires smoke leakage rated assemblies for new fire doors serving an area of refuge and requires compliance with nfpa 105 for new door assemblies in three locations. Per nfpa 80 the combustible flooring the subfloor and the surface cannot extend through the opening so a noncombustible sill is required.

Not all doors in a commercial building need to be fire rated. Product overview fire rated steel doors for commercial industrial applications. Vestibules that are part of a smokeproof enclosure horizontal exits and elevator lobby doors in occupant evacuation elevator shaft systems. 111 c recommended louver details for standard steel doors.

The construction at the fire door is tricky especially when the fire walls are type v construction using a u300 or u400 series fire wall assembly.