LOAD TRANSFERRING CONNECTING ELEMENT

Abstract

The invention relates to a load-transferring connecting element (1) for establishing a connection between a first building element and a second building element. The load-transferring connecting element is adapted for transfer of forces between the two building elements. The load-transferring connecting element (1) comprises an elongated box-shaped main body (24), wherein a first end portion (3) of the load-transferring connecting element (1) is arranged for attachment into the first building element with a remaining second end portion (4) of the load-transferring connecting element (1) positioned so that it projects from the first building element. The second end portion (4) is adapted for being received in a cavity (13) arranged in the second building element, and is provided with an attachment area (5) for attaching lifting equipment (8) for handling the first building element.

Claims

1. A load-transferring connecting element for establishing a connection between a first building element and a second building element and which is adapted for transfer of force between the first and second building elements, the load-transferring connecting element comprising an elongated box-shaped main body, wherein a first end portion of the load-transferring connecting element is arranged for attachment into the first building element with a remaining second end portion of the load-transferring connecting element positioned so as to project from the first building element, and wherein the second end portion is adapted for being received in a cavity arranged in the second building element, wherein the second end portion of the load-transferring connecting element is provided with an attachment area for attaching lifting equipment for handling of the first building element.

2. Load transfer connecting element according to claim 1, wherein the second end portion of the load-transferring connecting element is arranged with an adjusting device adapted for adjusting the relative height between the first building element and the second building element when receiving the load-transferring connecting element in the cavity of the second building element.

3. Load-transfer connecting element according to claim 1, wherein the attachment area comprises an attachment hole for attachment means which are connected to the lifting equipment.

4. Load transfer connecting element according to claim 2, wherein the adjusting device comprises a screw device which is adjustably arranged in a screw hole arranged in the load-transferring connecting element.

5. Load-transfer connecting element according to claim 1, wherein the first end portion is provided with a reinforcement arrangement to ensure transfer of forces between the load transferring element and the first building element.

6. A load transfer connecting element according to claim 5, wherein the reinforcement arrangement comprises at least one of the following reinforcement elements: a plate structure comprising two main surfaces and a plurality of side surfaces, the plate structure being fixed with one of its main surfaces to the main body so that the end opening of the first end portion is covered and the main surfaces protrudes perpendicularly from the main body, a transverse element attached to the first end portion of the load transferring connecting element and having an orientation where the longitudinal axis of the transverse element is positioned transversely to the longitudinal axis of the load transferring connecting element.

7. A building system comprising a first building element and a second building element and at least one load-transferring connecting element for establishing a connection between a first building element and a second building element, wherein the at least one load-transferring connecting element is adapted for transfer of force between the first and second building elements, the load-transferring connecting element comprising an elongated box-shaped main body, wherein a first end portion of the load-transferring connecting element is arranged for attachment into the first building element with a remaining second end portion of the load-transferring connecting element positioned so as to project from the first building element, wherein this second end portion is adapted for being received in a cavity arranged in the second building element, wherein the second end portion of the load-transferring connecting element is provided with an attachment area for attaching lifting equipment for handling of the first building element, and wherein the first building element comprises a stair unit and the second building element comprises a stair landing where the at least one load-transferring element projects from a side surface of the stair unit and into the cavity arranged in a side surface of the stair landing.

8. The building system according to claim 7, wherein the building system comprises lifting equipment comprising a plurality of elongated lifting bodies, wherein each elongated lifting body comprises attachment means for attachment to an attachment area provided on the projecting second end portion of the load transferring element.

9. Building system according to claim 7, wherein at least two load-transferring connecting elements are mounted projecting from a side surface at the lower step of the stair unit and at least two load-transferring connecting element are mounted projecting from a side surface at the upper stair step of the stair unit.

Description

[0022] In the following, an example of the invention will be described with reference to the accompanying figures, in which

[0023] FIG. 1 shows a stair shaft seen from above where a stair unit is lifted into place with lifting chains which are connected to a load-transferring connecting element according to the invention.

[0024] FIG. 2 shows the load transfer element attached to the stair unit.

[0025] FIG. 3 shows the stair unit in the installed position with the load transfer element accommodated in a cavity in a stair landing.

[0026] FIG. 4 shows a detailed view of the load transferring element in perspective.

[0027] FIG. 5 is a front view of the load transferring element of FIG. 4.

[0028] The load-transferring element 1 according to the invention is in FIGS. 1-3 shown molded into a first building element such as a stair unit 2. A first end portion 3 of the load-transferring element 1 is embedded in the stair unit 2, while the remaining second end portion 4 projects from the stair unit as it appears in the figures. The second end portion 4 is provided with an attachment area 5 in the form of an attachment hole, see FIG. 4, for receiving attachment means 6 such as an attachment screw. An intermediate piece 7 in the form of a wire loop ensures a connection between the attachment screw and a lifting chain for lifting the stair unit to the installation position between two stair landings 9,10 in a staircase.

[0029] The stair unit 2 shown in the figures has two load-transferring elements 1 positioned projecting from a side surface 11 at a lower part of the stair unit 2. Two further load-transferring elements 1 are arranged at the upper part of the stair unit 2, with other end portions 4 projecting from a side surface 12. The stair landings have cavities 13 each for receiving a load transfer element. Each cavity 13 has a side opening 14 in the side surface 16 of the stair landing and a top opening 15 in the top surface 17 of the stair landing to facilitate the insertion and receiving of the load transfer element in the cavity 13. The side surface 12 of the stair unit will be positioned parallel to the stair unit side surface 16 between two stair landings 9, 10.

[0030] When the stair unit 2 is placed with the load-transferring elements 1 accommodated in the cavities 13, as illustrated in FIG. 3, the load-transferring element 1 rests at an adjusting device in the form of a screw device 18 against the bottom 19 of the cavity 13. The screw device 18 is mounted in a screw hole in a lower side wall of the load transfer element 1, see also FIGS. 4 and 5, and may be adjusted up and down by a suitable screw tool (not shown) which is inserted through an access opening 22 arranged in the upper side wall 21 of the load transfer element 21. The screw 18 is adjusted to adjust the stair unit 2 so that the lower stair step 30 is flush with the top surface 17 of the stair landing. The same procedure is performed for adjusting the upper stair step 31 in alignment with the top surface 17 of the stair landing. Then the attachment means 6 shown here is loosened by the attachment screw, from the attachment area 5, shown here by the attachment hole. The lifting chain 8 may be removed and the cavity 13 may be filled with filling mass, preferably molding mass or other suitable filling mass for joining the stair unit 2 and the stair landing. The load transfer element 1 is adapted for the transfer of forces between the stair landing and the stair unit 2.

[0031] The load transfer element 1 has an elongated box-shaped main body. The main body 24 is shown with a square profile where the corners are rounded. It is of course also possible to use other profile shapes such as oval, circular, rectangular etc. Two reinforcement elements are attached to the main body 24; a plate structure 25 and a transverse element 27. It is of course possible to arrange for the reinforcement by other means than the two reinforcement elements shown here. The reinforcing elements are placed on the first portion of the load transferring element 1 and are thereby molded into the stair unit 1.

[0032] The plate structure 26 has two main surfaces 35 and four side surfaces 36, and is attached with one of its two main surfaces to the main body 24 so that the end opening of the first portion 3 is covered and the plate structure 24 projects perpendicularly from the main body 24. The plate structure is fixed with a weld 28 to the main body 24. The area of the main side of the plate structure 26 facing the main body 24 is larger than the area of the profile of the box-shaped main body 24, and the plate structure 26 thus projects from the main body 24. The transverse element 27 is arranged as a massive piece with an elongated shape with a rectangular cross-section. The transverse element 27 is fixed at the lower edge of the lower side surface of the load-transferring element 1 and is oriented so that the longitudinal axis of the transverse element 27 is oriented transversely to the longitudinal axis of the load-transferring connecting element 1, with a portion of the transverse element 27 projecting on each side of the main body 24.