How to choose the Right Fire-Rated Door?
Check the local building code and the authority having jurisdiction to determine the rating of the fire door you need. Fire Label: Will need to be attached. This is the agency approved certified or labeled doors, frames, and anchors for minimum ratings required by code. Fire Ratings by Hour & by Letter-Designation: Class “A” (3-hour)-Openings in firewalls that divide a single building into fire areas. Class “B” (1 hour)-Openings in enclosures of vertical shafts and stairwells through buildings and in 2 hour rated partitions providing horizontal fire separations Class “C” (3/4 hour) – Openings in walls or partitions between rooms and corridors having a fire resistance rating of 1 hour or less. Class “D” (1 1/2 hour) – Openings in exterior walls subject to severe fire exposure from outside the building. Class “E” (3/4 hour) – Openings in exterior walls subject to moderate or light fire exposure from the outside of the building. No letter designation (1/2 or 1/3 hour) – Openings in walls
