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. The door and frame assembly is fire rated with a 1 1 2 hours fire rating. Doors up to 4 0 wide and 8 0 tall can use standard weight 134 thickness. The door panel and frame are both made from galvanneal steel to secure and protect your home or building. And can be used with new masonry and drywall construction when the wall is being built.
A fire door is a door with a fire resistance rating. Door hardware must be fire listed and comply with the national fire protection association s nfpa80 standard for fire doors and fire windows hinges. 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. 37 in x 4 625 in wood door threshold install with screws item 130223 model 45837oaksl.
The frame is compatible with walls that have a thickness of 4 7 8 in. 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.