For external front or back doors and door pairs.
Fire door frame with threshold.
And since simpson fire doors have been designed to match other interior doors your fire rated doors will blend seamlessly with all doors in your home.
Top quality solid unassembled frame with threshold sill rebated for 44mm thick door leaf and supplied with aquamac 21 joinery seal.
When speaking with manufacturers however a common statement is that a fire doors gap of up to 8 mm underneath the door is permissible.
Thresholds are rarely mandated by the codes and standards for fire doors or smoke doors but when they are used in these applications thresholds must be listed to ul 10c or nfpa 252.
The practice of knocking up a door frame on site or in a workshop hanging a door and believing that the result constituted a valid fire door installation was never correct.
When is a threshold or door bottom required for a fire door or a smoke door.
Suitable for inward or outward opening doors this frame provides an excellent colour match across the components compared to cheaper options.
Thresholds should be provided under the door and between the frame to allow for a smooth transition between floor coverings of different heights or materials.
Special consideration should be given to threshold designs used in means of egress or in handicap accessible situations.