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A prefabricated building element is configured to be connected to a lateral side of a prefabricated building structure for forming a part of a building such that the building element forms a wall or a roof slab or a floor slab of a building. The building element includes a wooden core arranged adjac

A prefabricated building element is configured to be connected to a lateral side of a prefabricated building structure for forming a part of a building such that the building element forms a wall or a roof slab or a floor slab of a building. The building element includes a wooden core arranged adjacent to at least one insulating layer, and at least one engagement means for later engagement with the prefabricated building structure by means of a connecting device, wherein the building structure is a prefabricated module or another prefabricated building element.

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1. A prefabricated planar building element provided as a wall-panel and configured to be connected to a lateral side of a prefabricated building structure for forming a part of a building, wherein said wall-panel comprises: a wooden core arranged adjacent to at least one insulating layer, wherein sa

1. A prefabricated planar building element provided as a wall-panel and configured to be connected to a lateral side of a prefabricated building structure for forming a part of a building, wherein said wall-panel comprises: a wooden core arranged adjacent to at least one insulating layer, wherein said wooden core comprises cross-laminated timber;technical installations including electric cables or hollow guides for electric cables;at least one engagement element constructed for engagement with said prefabricated building structure by means of a connecting device, wherein said building structure is a prefabricated module or another prefabricated building element, said engagement element comprises a recess extending into the wooden core of said wall-panel;the wall-panel having upper and lower edges, an upper batten located along the upper edge of the wall-panel, and a lower batten located along the lower edge of the wall-panel, and wherein the upper and lower battens project beyond opposite sides of the wall-panel; andwherein the wall-panel is constructed as a load-bearing structure, and the wooden core is a load-bearing element. 2. The building element according to claim 1, wherein said insulating layer is formed as a multi-layer structure comprising an inner layer of acoustic damping material and/or fire resistant material, and an outer layer. 3. The building element according to claim 2, wherein said wall-panel is substantially symmetrical along the wooden core. 4. The building element according to claim 1, wherein at least one of said electrical cables or hollow cable guides extend from a pre-mounted socket through the building element. 5. The building element according to claim 1, further comprising a window and/or a door opening. 6. The building element according to claim 1, wherein the battens are configured to be received in a recess at a joint between two slabs. 7. The building element according to claim 6, wherein the wall-panel is configured to be fixed to the two slabs at said joint by means of fasteners through the battens and into said slabs. 8. The building element according to claim 7, wherein the fasteners comprise screws. 9. The building element according to claim 7, wherein the fasteners extend through the battens at a portion of the battens projecting beyond the opposite sides of the wall-panel. 10. The building element according to claim 2, wherein the outer layer comprises gypsum board. 11. The building element according to claim 1, wherein the wall-panel is constructed to extend between a floor and a roof.