| 摘要 |
<p>A fire door leaf comprises two parallel outer metal plates (10, 12) which each, along the circumference of the door leaf, exhibits a joining plate portion (10''', 12''') passing into respective outer metal plates (10, 12), as well as assigned fastening means, such as screws (34), for joining the metal plates (10, 12). Parallel, adjacent joining plate portions (10''', 12''') are disposed spaced from each other perpendicularly to the door leaf, and in the space between the joining plate portions (10''', 12''') is disposed a shape durable thermal insulation body (16) following the circumference of the fire door leaf and forming a heat breaker body.</p> |
