Fire Rated Door Threshold Detail

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.

Fire rated door threshold detail.

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. Standard steel doors can be provided with a variety of louver designs and sizes. This publication contains explanations and details of louver designs that are most commonly available within the standard door industry.

Trudoor is an authorized whi fire labeled shop warnock hersey intertek enabling us to modify re certify and label fire rated doors and frames. Per nfpa 80 the combustible flooring the subfloor and the surface cannot extend through the opening so a noncombustible sill is required. 111 c recommended louver details for standard steel doors. Not all doors in a commercial building need to be fire rated.

I treat the threshold as part of the sill assembly. When speaking with manufacturers however a common statement is that a fire doors gap of up to 8 mm underneath the door is permissible. And we are certified by ul to cut re certify and label fire rated glazing materials. Commercial fire rated door requirements are typically determined by the fire rating of the wall and use of the door.

Product overview fire rated steel doors for commercial industrial applications.