2 hour 1 1 2 hour 90 minute.
Residential fire rated door requirements.
By the way cutting a hole in the door to install a pet door flap voids the 20 minute rating.
Fire doors are generally fire resistant sealed frame doors made of various materials and installed in fire rated walls.
If the door is not solid wood or steel honeycomb and at least 1 3 8 thick then it must have a 20 minute fire rating.
Fire door requirements are set by the national fire protection association and these requirements have been incorporated into most local building codes in the united states with little to no modification.
Basic fire door fire door frame transom sidelight frame and window frame requirements table 1 fire door openings opening wall rating door and frame rating description and use 4 hour 3 hour 180 minutes these openings are in walls that separate buildings or divide a single building into designated fire areas.
Fire door designs complement simpson interior door designs for architectural.
And best of all simpson 20 minute fire rated doors match up perfectly with virtually any simpson interior panel door regardless of design or species.
This classification covers most residential requirements and can also meet commercial requirements for 20 minute.
A solid wood door not less than 1 3 8 inches thick a solid or honeycomb core steel doors not less than 1 3 8 inches thick or a 20 minute fire rated door with a self closing device.
Door to house this is the only place where any fire rating is specified.