| 摘要 |
1. Sandwich building element for wall constructions with at least one interior hollow space or air space (5), exterior cover plates (1) and sound-insulating material (2), preferably a porous material, fixed to the surfaces of the cover plates (1) facing the hollow space or the air space (5), characterized in that the surfaces of the sound-insulating material (2) facing the hollow space or the air space (5) a reinforcing or strengthening layer (6) has been completely or partly applied, and that the reinforcing or strengthening layer (6) consists of a metal foil or glass fibre material. |
