Fire-resistant frame of wood and/or wooden materials with parts having core of medium density fibre board

摘要

Individual parts (1, 2, 3) of a fire-resistant frame of wooden and/or wooden materials, with core frame (1) and attached soffit section (3) with cladding (2), have a medium-density fibre board as a core and a layer (6) of rigid fibre boards is glued at least on the outer side (9). Pref. the a layer of fibre boards is glued to the inside (10) of the core frame and the cladding at the brickwork opening. The soffit section is pref. in two parts (3a, 3b) with a glued parting plane (11) at which each part has a groove, in which a spring (7) is inserted.