Wooden fire-resistant door-leaf

摘要

The chipboard core (8) has covering layers (9) on the inside and outside (14,13) also glued components (3) along the top and side edges. These comprise an outer wooden strip and an inner fire-resistant one (4) contg. natrium silicate, also a further layer (5) if desired. At the glued components, a peripheral groove is milled in the chipboard, and in which a stabiliser strip (6,7) is inserted and glued. The strip can comprise a middle layer (7) between outer ones (9), these running parallel to the edges and at right angles to the inside and outside. The middle layer can be a hard fibre plate, and the outer ones medium-hard fibre plates. The covering layer (9) can also be a hard-fibre plate.