Patent ID: 11946314
Assignee: GOLDENSE OPENINGS SOLUTIONS LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 9:
10. A method for modifying a fire door clearance, comprising:
fastening a non-flammable metal strip to a door with an adhesive and a mechanical fastener in the door that engages a slot in the metal strip, wherein the non-flammable metal strip wraps around an edge of the door and an intumescent material is sandwiched between the non-flammable metal strip and the edge of the door; and
sliding the non-flammable metal strip away from the edge of the door in response to an expansion of the intumescent material to seal a clearance between the edge of the door and an adjacent structure,
wherein the mechanical fastener in the door engaging the slot in the non-flammable metal strip guides the non-flammable metal strip such that the non-flammable metal strip slides away from the edge of the door in a first predetermined direction and is prevented from sliding in a second predetermined direction in response to the expansion of the intumescent material.