| 摘要 |
A level apparatus is provided with an elongate level and a support. The level and the support each have opposed ends, front and rear faces and top and bottom faces. The top and bottom faces of the support are substantially planar and parallel to one another, and the top and bottom faces of the level are substantially planar and parallel to one another. A central position on the support is pivotally connected to the level such that the rear face of the support is in opposed facing relationship to the front face of the level. The level can be used in a conventional manner without utilizing the support. However, the support can be pivoted relative to the level into an orientation where the top or bottom face of the support can be positioned on the upper face of a beam such that the level extends downwardly from the support and the beam. The level then can be used to define a plumb line to which other structural elements can be positioned or compared.
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