To vertically set a load-applied column such as a lift by simple operation, for safely lifting a heavy cargo, even if a floor surface inclines.

A vertical adjustment can be made in the cross direction by crosswise sliding the lower end of the column 1 with a point of 600 to 700 mm above from the lower end of the column 1 of a truss structure as a fulcrum. A vertical adjustment can be made in the longitudinal direction by longitudinally moving the apex of a triangle composed of two braces 7 by vertically moving an upper fulcrum 2 for supporting the column 1. The vertical adjustment can be easily made while visually confirming a level.