Fire Door Without Threshold

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.

Fire door without threshold.

Door hardware must be fire listed and comply with the national fire protection association s nfpa80 standard for fire doors and fire windows hinges. Doors up to 4 0 wide and 8 0 tall can use standard weight 134 thickness. When nfpa 80 requires sills to have a minimum width of 4 inches some have interpreted that to mean that fire door assemblies are required to have a 4 inch wide threshold. Field modifications of fire listed assemblies must either be inspected by a listing agency representative or.

The growing field of access control and electronic entry systems has resulted in some fire doors being field modified without proper listing agency approval. A fire door is a door with a fire resistance rating. Fire door assemblies are not typically required to have thresholds so defining the terminology helps to establish that the minimum 4 inch sill is actually part of the. The frame is compatible with walls that have a thickness of 4 7 8 in.

A fire rated door must be hung on ball bearing type hinges made from steel or another non ferrous metal. The door and frame assembly is fire rated with a 1 1 2 hours fire rating. The door panel and frame are both made from galvanneal steel to secure and protect your home or building.