| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lightweight hand hole superior in carrying performance and workability, easy in manufacture, restraining cost, and having the larger content unit volume than an outside dimension. <P>SOLUTION: This hand hole is constituted by respectively installing a bottom surface panel 2, a hole borable side surface panel 3, and an upper surface panel 4 forming an inspection port 4a on a skeleton 1, by assembling the cubic skeleton 1 by a frame material 1a. Thus, the hand hole is composed of the cubic skeleton 1 and panels 2, 3 and 4 of six surfaces, and thereby becomes lighter and easier in carrying than a concrete hand hole. The content unit volume is larger than an outside diametrical dimension, and since a cable pipe 5 can be inserted and connected by opening a hole 3b in the side surface panel 3 in response to the cable pipe 5 at a burying site, workability is improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
