Fire Door Threshold Requirements

Not all doors in a commercial building need to be fire rated.

Fire door threshold requirements.

Fire door requirements are set by the national fire protection association and these requirements have been incorporated into most local building codes in the united states with little to no modification. Regardless of the occupant load there shall be a floor or landing on each side of a door. Metal fire doors can attain ratings up to 3 hours where wood fire doors can be rated up to 90 minutes. F change in floor level at doors.

Fire rated door and frame. Building codes for exterior doors. 1 1 1 with the exception of fabric fire safety curtain assemblies this standard addresses assemblies that have. Not all fire doors and smoke doors are required to have air leakage limited to this level the key is to look for the reference to ul 1784 in the requirements for a specific door location.

The floor or landing shall be no more than 1 inch lower than the threshold of the doorway. Section 1910 155 c 3 iv a of this part defines listed and 1910 7 of this part defines a nationally recognized testing laboratory. For example the ibc requires this limited airflow for fire doors that are also smoke and draft control doors in corridors and smoke barriers. Each fire door including its frame and hardware must be listed or approved by a nationally recognized testing laboratory.

This standard regulates the installation and maintenance of assemblies and devices used to protect openings in walls floors and ceilings against the spread of fire and smoke within into or out of buildings. These requirements apply to all fire rated doors frames and windows. Fire doors are generally fire resistant sealed frame doors made of various materials and installed in fire rated walls. Where a door opens over a landing the landing shall be at least as wide as the door and at least 5 feet long.

Exterior doors in homes and businesses not only provide security but they also serve as a vital means of egress during a fire or other emergency. When speaking with manufacturers however a common statement is that a fire doors gap of up to 8 mm underneath the door is permissible. 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. 2 hour 1 1 2 hour 90 minute openings of this type are used in enclosures of vertical.