Fire door standard sizes.
Fire door size chart.
This will give you room to space the door frame off of the sub floor.
Maximum doors size for fire ratings is influenced by but not limited to the following items.
Local codes should be reviewed but in general rated doors must be self closing and must have a positive latch.
Metric sized internal doors are becoming increasingly popular and are now commonly used in scotland and europe.
Just add 2 to the width of the actual door size.
Common options are 2040 x 526 626 726 826 926 x 40mm.
Getting the rough opening size right the first time will save you from frustration when installing your doors.
20 gage door constructions are approved for smaller door sizes than what is shown above.
Chart of door ratings and labels.
Door size conversion chart.
You should add 2 1 2 to the height of the actual door.
Metric size fire doors are also available within some of the ranges and there is usually the option of the following sizes to select from 626mm x 2040mm 726mm x 2040mm 626mm x 2040mm and 926mm x 2040mm it is worth noting that although these are standard metric sizes not all doors will be available in these sizes whilst metric size doors.
This is because extra core component materials are required in the construction of the door to achieve its fire rating.
Steel gage of the door example.
The main difference between these and the standard uk sizes above are an increased door height of 2040mm and door thickness of 40mm.
Fire ratings for doors are influenced by but not limited to the following items.