| 摘要 |
<p>The barrier comprises two parts, a rigid member 18 which is fixed to a first cavity wall 12 and extends across a portion of the gap, and an in-fill member 20 which is adjustable to extend to the other wall 14 to fill the gap. The rigid member is preferably treated with fire retardant, water repellent and an insect and fungi preservative. It may be a timber batten, or a fire resistant material. The in-fill is preferably flexible and compressible. It comprises either a length of mineral wool enclosed in a polythene sleeve, intumescent material, or a brick or steel sheet. The in-fill may be positioned in a channel on the rigid member. The upper surface of the rigid member preferably slopes downward away from the wall to allow moisture drainage. In use, the barrier limits flame spread together with heat and smoke movement between cavity walls in a building. The cavity is preferably between two timber frame panels or timber frame and masonry cladding.</p> |
