Abstract: A method for erecting buildings is characterized in that cassettes (10) made in a form between sectional elements (11) are positioned, at the building site, in such manner that the sectional elements (11) are close to one another and together define vertical cavities in which preferably concrete is injected to form supporting columns. Horizontal beams (23) are joined to the sectional elements (11) to be connected to the supporting columns when these are being cast, thereby to achieve a structural skeleton. A structural assembly for carrying out this method comprises cassettes (10) made in a form between sectional elements (11). The sectional elements (11) serve as supporting means when the cassette (10) is handled, and as a form for producing supporting columns after the cassettes (10) have been positioned at the building site.

Abstract: A tractor having a subframe (10) to which a telescoping arm (13) is vertically and horizontally pivoted, and the driver's cab (14) is connectable to the arm (13) to permit being placed in any desired position. The telescoping arm (13) is extensible from a length smaller than that of the subframe (10) to a length considerably in excess of that of the subframe (10), whereby the cab can be mounted on the subframe as well as in different locations about and above the subframe (10), say behind an implement (22) towed by the tractor. The drive unit (12) of the tractor is readily detachably connected to the subframe (10).