The drawings set out the terminology for dimensioning door sets.


a) 7mm tolerance between structural opening and frame assembly
b) 3mm gap
c) 3mm at meeting stiles

Note: The maximum clearance permitted from the top of the finished floor level to the underside of the door leaf is:

Fire resistance:

FD30 and FD60 – 10mm
FD90 and FD120 – 5mm

Smoke control:

HTM 58 – 10mm
BS8214 – 3mm