首页>
外国专利>
Access trap door for pipes and cables in buildings has one-piece fixed surround and door with stepped surfaces and fire-resistant seal
Access trap door for pipes and cables in buildings has one-piece fixed surround and door with stepped surfaces and fire-resistant seal
展开▼
机译:建筑物中管道和电缆的进出陷阱门具有一件式固定式围板和带有阶梯状表面且防火密封的门
展开▼
页面导航
摘要
著录项
相似文献
摘要
A fixed surround (1) and trap door (2) are each made in one piece from medium and/or high density wood fibres and a bonding agent, compressed at high temperature and at least 40 mm thick, with the surround forming a stepped frame (3) round an opening. T The fixed surround (1) and trap door (2) are each made in one piece from medium and/or high density wood fibres and a bonding agent, compressed at high temperature and at least 40 mm thick, with the surround forming a stepped frame (3) round an opening. The surround has a flat surface (3A) to receive the trap door, which has a matching stepped outer surface (4), and there is a seal (5), preferably both sound resistant and intumescent, between the flat horizontal surfaces (3A, 4A) of the surround and trap door. Both surround and door can have a polymer coating, preferably 0.4 mm thick, and the door has locking catches that are accessible from the outside e.g. by a square key.
展开▼