A0, A60, H0, H60 and H120 ratings
Fire ratings such as A60 and H120 indicate the duration the doors and walls must be able to withstand a particular type of fire. InterDam has undertaken extensive research and development which has resulted in innovative, light-weight designs. These designs have been approved by designated authorities such as DNV and Lloyd’s Register.
Difference between A- and H-fire ratings
A-fire rated doors and walls are tested with a ISO cellulosic fire temperature curve. H-fire rated items are tested with a hydrocarbon fire curve. The hydrocarbon fire curve has a faster build-up and higher plateau temperature than the standard A-curve.
The fire doors and
|Classification||Time in minutes||Time in minutes|
|Integrity and load bearing capacity||Insulation performance|
2987 VB Ridderkerk
T: +31 (0) 180 470030
InterDam Americas Inc.
19998 Hickory Twig Way
Spring, TX 77388
T: +1 281-882-8302