| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the spread of a fire even if a barrier for separation is not installed, by placing a refractory plate on the flange of a cable tray, and fixing both sides of the refractory plate by catching the refractory plate and the flange with a pair of clamps, covering the opening of the cable tray. SOLUTION: Flanges 12e2 are made at the tops of both side plates 12e1 of a cable tray 12e by bending the tops of side plates 12e1. On the other hand, a refractory plate 14 is made in the shape of a rectangle as wide as the cable tray 12e, and it is placed on the flanges 12e2 of the cable tray 12e to cover the top opening. Then, both ends of the refractory plate 14 are fixed for coupling and integration by catching the refractory plate 14 and the flanges 12e2 with a pair of clamps 16 which are made capably of division into a long piece 16a and a short piece 16b by bending both ends of a long metallic plate in U shape. Hereby, the spread of a fire can be prevented even if a barrier for separation is not installed.</p> |
