Fire Door Size Chart
This will give you room to space the door frame off of the sub floor.
Fire door size chart. You should add 2 1 2 to the height of the actual door. 20 gage door constructions are approved for smaller door sizes than what is shown above. Maximum doors size for fire ratings is influenced by but not limited to the following items. The main difference between these and the standard uk sizes above are an increased door height of 2040mm and door thickness of 40mm.
2 1 2 4 louvers for fire doors. 2 1 2 3 steel astragals on fire doors. Where required by a manufacturer s listing or ansi nfpa 80 fire doors and fire windows a steel overlapping astragal shall be provided. This is because extra core component materials are required in the construction of the door to achieve its fire rating.
Chart of door ratings and labels. Fire door standard sizes. Local codes should be reviewed but in general rated doors must be self closing and must have a positive latch. Just add 2 to the width of the actual door size.
Common options are 2040 x 526 626 726 826 926 x 40mm. All of the standard uk and metric door sizes are usually available as a fire door equivalent with the only difference being an increased door thickness of 45mm. Fire ratings for doors are influenced by but not limited to the following items. Steel gage of the door example.
Framing rough opening sizes are really quite simple. Getting the rough opening size right the first time will save you from frustration when installing your doors. Door size conversion chart.