| 摘要 |
A concrete screed comprising an elongated beam with top and bottom flat surfaces joined to an intermediate hollow, tubular cylindrical section, formed of a plurality of interconnected separable beam units. Each adjacent pair of beam units is interconnected by a tongue body of a size and shape adapting it to closely fit within passages at end portions of the adjacent beam units, such passages being formed corporately by the bottom flat plate, the tubular section, and generally vertical ribs joining the bottom plate portion to the tubular section. The tongue body is secured to each of the adjacent beam units, with its respective ends disposed within the respective passages of the adjacent beam unit. The screed comprises means for imparting vibrations to the second plate portion, and a handle connected to the first plate portion. In a further embodiment, the screeding apparatus features turnbuckle assemblies associated with first plate members of adjacent beam units, whereby the attitude of the adjacent beam units relative to one another may readily be adjusted to a selected relationship.
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