Smoke-Rated and Fire-Rated Doors
2.2 Suitable products
Suitable KFV products can be recognised by the Ü mark and their DO number.
Because of the materials used, they are suitable for use in smoke-rated doors as
well as in fire-rated doors with a resistance time of at least 90 minutes (T90). The
DO number indicates the testing centre which granted the certification (DO for
Dortmund Material Testing Office), the manufacturer and the place of manufacture
The following images illustrate the meaning of structural fire protection.
Fig. 1: Start of a fire protection test at ift Rosenheim
Fig. 2: Fire side of the door after the fire test Fig. 3: KFV main lock with FS latch
after the fire test
Source of all photographs on this page: Moralt Tischlerplatten, Bad Tölz, Germany
12 Last update: 11.01.2013