| 摘要 |
A safety guardrail support comprises first and second hollow vertical members, the latter being movably received in the former, a first clamp member secured to the lower end of the first vertical member and a second clamp member secured to the lower end of the second vertical member, upper and lower reinforcing assemblies extending from the lower ends of the first and second hollow vertical members respectively and being slidably engaged at a location spaced from the vertical members and a threaded rod extending interiorly of the first vertical member and threadedly engaging the second vertical member whereby the turning of the threaded rod causes the second clamp member to be raised or lowered in order to secure the apparatus on the open edge of the floor section of a building structure and concomitantly the lower reinforcing assembly slideably engages the upper assembly thereby supporting and reinforcing the support structure.
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