| 摘要 |
Prefabricated panel 10 has two adjacent upper plates 11a and 11b, and two adjacent lower plates 12a and 12b. There is at least one central joining member 20 between an upper and a lower plate and there is a core 13a and 13b between the upper and lower plates. Preferably the central joining members secure the plates relative to each other by welding 24 and 26. One central joining member may be an I beam. One joining member can be joined to another or spaced apart from it. The panels can be bent around an edge member or bend towards each other and overlap at the edge. Preferably there are inserts near the edges to support bolts for attachment to other structures. The core may be plastic and contain hollow inserts 15 which do not tessellate. The panel is usable on a building floor. A manufacturing method is also disclosed.
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