| 摘要 |
The invented floor part consists of a rectangular supporting frame (1) with a tread-on board (2), whereby the supporting frame (1) is made of longitudinal and transverse beams (12, 11). On the front and rear ends (S) of the supporting frame (1) formed by the transverse beams (11) there are fastened at least two grips (3) that are arranged on the transverse beams (11) in the direction parallel with the front and rear ends (S) in such a manner that their distance from the supporting frame (1) longitudinal sides (L) formed by the longitudinal beams (12) enables side overlap of the grips (3) turned toward each other on opposite face sides (S) with respect to a plane being parallel to the longitudinal beams (12). The transverse beams (11) and/or the longitudinal beams (12) have hollow, substantially rectangular cross section and consist of two vertical walls (12a, 12b) and horizontal strips (11c, 12c) being both parallel to each other. On corner joints (E) of the supporting frame (1) the second wall (12b) is cut out in a width corresponding to the width of the transverse beam (11) following up therewith. At least the transverse beam (11) walls (11a, 11b) extend up to the first vertical wall (12a) and are welded up with second strips (12c) and/or vertical walls (12a, 12b) of the longitudinal beam (12). |
