| 摘要 |
<p>A thermal insulating or fire retardant construction element (1) is described, consisting of outer layers (5, 6) of glass fibre reinforced concrete and a mineral wool layer (4) between the outer layers (5, 6). At the back of the panel (1) a cavity (7) is formed to permit circulation of air between the panel (1) and the wall therebehind. A lead-through duct is also described for leading a smoke pipe from a fireplace to a chimney through the element, the external face of the duct communicating with the air space behind the element.</p> |
