Abstract: A device and method for indicating if a fastening element upon fastening to a piece has reached a tensile yield limit load. The fastening element includes a threaded shaft having a magnetostrictive material. The device includes a mechanism for generating an alternating magnetic field that penetrates the shaft, a mechanism for measuring a physical quantity that depends on the momentary magnetic susceptibility of the shaft and a control unit adapted to detect a significant change of the physical quantity and determine and indicate if the shaft of the fastening element has reached the tensile yield limit load.

Abstract: A device and method for indicating if a fastening element upon fastening to a piece has reached a tensile yield limit load. The fastening element includes a threaded shaft having a magnetostrictive material. The device includes a mechanism for generating an alternating magnetic field that penetrates the shaft, a mechanism for measuring a physical quantity that depends on the momentary magnetic susceptibility of the shaft and a control unit adapted to detect a significant change of the physical quantity and determine and indicate if the shaft of the fastening element has reached the tensile yield limit load.

Abstract: A packaging unit for sheet like material such as paper, comprises a box (1) provided with a lid (2), both of rectangular configuration and including a center part, two side parts and two end walls parts which are easily dismountable. Each box end wall part (4) has an additional end wall part (3) which is mounted externally of the first mentioned end wall part (4) and has a generally rectangular configuration and an area which is 70-100% of the actual area of the inwardly lying end wall part (4). The additional end wall part (3) is fastened at least partially to the lower region of the inwardly lying end wall part (4) and the additional end wall part (3) is provided in its upper half with a foldable lip (7) from which material has been removed on at least one side (5,6). The lip (7) enables the uppermost part of the additional end wall part (3) to be folded outwardly of the lid end wall part and subsequent to being folded, functions to strengthen and protect the resultant gripping aperture.

Abstract: A room structure to be located on a deck. A plurality of independent wall members flanged at their lower ends for connection to the deck. Grooved members interconnect the tops of adjacent wall members. Roof members span the tops of the wall members. Each set of roof members of a room structure includes at least one beam containing a supply for electricity, heat and ventilation and also containing apparatus for using the same. The roof members include ceiling plates resting on the groove members and supported by the beam.