The European standard
European standard EN 1192 “Doors. Classification of strength requirements” provides a classification method for the performance of door leaves, frames, door sets, door sets assembled according to their resistance to vertical loads, static torsion, soft and heavy impacts and hard impacts. Special requirements, such as those for burglary resistance or safety requirements relating to glass infillings are not covered in this standard.
Improved Mechanical Resistance (IMR)
One of the basic performance features of Heinen Metal+ hung doors is class M+7 Improved Mechanical Resistance (IMR) to avoid premature ageing due to accidental or intentional impacts.