| 摘要 |
<p>Individual spaced girders have cassettes forming a ceiling plugged to them with the aid of clamping members' for assembly on site. Main girders running one way are intersected by intermediate girders. Connection between them is provided by intermediate pieces clamped onto the main girders' with the intermediate girders hung into them. Clamping members attachable to the panel-shaped cassettes' are resiliently insertable in the downwards-open intermediate girders. The intermediate pieces can have fishplates gripping main girder shanks, and an end protruding piece for hanging the intermediate girder in position. Assembly and dismantling can be easily carried out without tools, and without risk of damage, and cassettes are easily replaced or moved elsewhere.</p> |
