| 摘要 |
A supporting element for use in casting concrete floors on a foundation and comprising a base member (1) and a top mem- ber (2) with a sliding plane surface (3) to allow a concrete-levelling devic e carried by the supporting element to be moved along the sliding plane surface (3). According to the invention the supporting element comprises two longitudinal form stable side walls (4, 5) defining between them a longitudinal space (6). At least one of the side walls (4, 5) is provided with a plurality of through- holes (7, 8) disposed to permit fresh concrete to flow through into said spa ce (6) during said casting, so that the space is filled with concrete.
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