| 摘要 |
<p>A load bearing floor or roof member is in the form of a flat plank member. It has flat major upper and lower walls and flat minor side walls. It is a rigid, hollow, integral structure of fibre reinforced plastics material, with a rigid plastics foam filling. In each minor side wall is an integral undercut channel which is shaped to receive slidably a connector portion of a connector member, which connector portion is of head and neck shaped cross section.</p> |
