Abstract: A wooden beam (1) has several sections which are subjected to a transversal tension and which affect in particular the areas in which there are recesses or openings (3). Rod-shaped elements are provided in the form of screws (4) which are introduced in such a way that they extend crosswise to the longitudinal direction of the beam (1) in order to absorb this transversal tension. These screws are screwed in from the top side (5) or the underside (6) of the beam (1) and each extend over part of the height (H) of the beam (1) only and are therefore directly associated with the area (2) that is subjected to transversal tension.

Abstract: In a joint between two wooden structural members (2 and 3) there is inserted a joint plate (4), whose foot part (5) is joined abuttingly to the wooden structural member (2) by screws (7). The joint plate (4) is pushed into a slot (8) of the wooden structural member (3), whereupon connecting elements (1) are inserted in appropriate number through the wooden structural member (3) and the joint plate (4). Such a connecting element is provided at one of its ends with a boring part (11) and at its other end with a tool drive (12). The worked-off material is received by a portion (14) of smaller cross section and appropriate flutes (13). In addition, an axially secure relationship after setting is achieved with a thread (15) at one end of the connecting element. After it has been finally set, the connecting element (1) is seated in an exact fit as the fixation between the joint plate (4) and the wooden structural member (3) in its self-drilled hole.

Abstract: A wooden beam (1) has several sections which are subjected to a transversal tension and which affect in particular the areas in which there are recesses or openings (3). Rod-shaped elements are provided in the form of screws (4) which are introduced in such a way that they extend crosswise to the longitudinal direction of the beam (1) in order to absorb this transversal tension. These screws are screwed in from the top side (5) or the underside (6) of the beam (1) and each extend over part of the height (H) of the beam (1) only and are therefore directly associated with the area (2) that is subjected to transversal tension.

Abstract: In order to effect an interconnection of two wood beams (1, 2) that are joined together while forming an at least approximately right angle, screws (3) are provided which engage inside both wood beams (1, 2). To this end, at least two screws (3) are inserted which are arranged in two planes running parallel to one another and which are screwed in such that they cross. In one of the beams (2), screws (3) are inserted in planes that are parallel to the grain and thus engage in the other beam (1) at a right angle or acute angle to the grain.

Abstract: In a joint between two wooden structural members (2 and 3) there is inserted a joint plate (4), whose foot part (5) is joined abuttingly to the wooden structural member (2) by screws (7). The joint plate (4) is pushed into a slot (8) of the wooden structural member (3), whereupon connecting elements (1) are inserted in appropriate number through the wooden structural member (3) and the joint plate (4). Such a connecting element is provided at one of its ends with a boring part (11) and at its other end with a tool drive (12). The worked-off material is received by a portion (14) of smaller cross section and appropriate flutes (13). In addition, an axially secure relationship after setting is achieved with a thread (15) at one end of the connecting element. After it has been finally set, the connecting element (1) is seated in an exact fit as the fixation between the joint plate (4) and the wooden structural member (3) in its self-drilled hole.

Abstract: In a screw (1) for fastening wooden laths (10) to a roof substructure provided with wooden beams (9) among other alternatives, one threaded portion (2, 3) each adjoining the head (5) of the screw and adjoining a penetrating or boring point (6) is provided, these two threaded portions (2, 3) having the same major diameter. A thread-free shank portion (4) is provided between the two threaded portions (2, 3).