| 摘要 |
Light-metal girders with an "I" or "H" cross-section, used in construction work, especially for the shuttering of concrete on building and civil engineering sites. The single or multiple wood casing (1), serving to fasten panels on the girders and lining the upper flange is very securely fastened to the metal, by adhesive bonding and crimping, for example, thus influencing the inertia of the section and increasing the strength of the assembly. The lower metal flange, which is flat and horizontal, is bent into a "hook" shape at each lateral end of the section, forming two continuous slides (2). On these slides, slide detachable parts (3) for fixing the girders on the support flange, as profiled bars, by virtue of a conical opening. Connection fishplates for the girders (4) are locked behind these slides, only one central clamping element being required, to the exclusion of all bolt connections with drilling of the girders. <IMAGE>
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