Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
  • E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
  • E04B2/70—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of wood
  • E04B2/701—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of wood with integrated supporting and obturation function
  • E04B2/702—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of wood with integrated supporting and obturation function with longitudinal horizontal elements
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
  • E04B1/02—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements
  • E04B1/10—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements the elements consisting of wood
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
  • E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
  • E04B2/7407—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts
  • E04B2/7409—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts special measures for sound or thermal insulation, including fire protection
  • E04B2/7412—Posts or frame members specially adapted for reduced sound or heat transmission
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
  • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
  • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
  • E04C2/12—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of solid wood
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C3/00—Structural elongated elements designed for load-supporting
  • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
  • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members

Definitions

• the invention relates to building, specifically to the forming of compartmenting wall structures.
• the objective of the invention is to provide a new solution for improving sound insulation in a partition wall structure.
• a first solution provides a wood element having a longitudinal direction, a height direction and a lateral direction.
• the wood element is delimited in the height direction by a lower surface and an upper surface and in the lateral direction by a first lateral surface and a second lateral surface, wherein the first lateral surface has a connection point of a partition wall structure.
• the wood element has a groove extending in the height direction of the wood element, which groove extends in the lateral direction of the wood element from the first lateral surface towards the second lateral surface without reaching it, limiting the conduction of sound via the wood element over said connection point of the partition wall structure. This may significantly reduce the flanking transmission of sound over the connection point of the partition wall structure and thus also over the partition wall structure that begins at the connection point.
• the second lateral surface remains solid in the longitudinal direction of the wood element over the groove, whereby the second lateral surface does not need a separate moulding, boarding or follower.
• the expression "over the connection point of the partition wall structure" may herein be considered to specifically mean the propagation of sound in the wood element from the first lateral surface to the first lateral surface.
• said connection point of the partition wall structure is a recess extending in the height direction of the wood element to embed the partition wall structure in the lateral direction into the wood element, whereby said groove starts in the lateral direction of the wood element from said recess.
• the partition wall structure it is possible to use the partition wall structure to cover horizontal joints between overlying wood elements, such as logs, such that there is no visibility through these points to the other side of the partition wall structure, and the propagation of sound through the grooves of the horizontal joints is prevented or limited.
• said groove extends in the lateral direction of the wood element over the midpoint of the wood element. This allows the sound to be conducted to the side of the second lateral surface of the wood element, whereby its conduction back to the first lateral surface can be significantly limited.
• a first branch groove or broken branch groove extending in the height direction of the wood element diverges from said groove, which first branch groove or broken branch groove extends to the longitudinal direction of the wood element, limiting in the longitudinal direction of the wood element the conduction of sound propagating between the first branch groove or broken branch groove and the first lateral surface towards the second lateral surface.
• Such branch grooves or broken branch grooves can significantly extend the distance through which the sound should propagate in the wood element to cross over the connection point of the partition wall structure (from the first lateral surface to the first lateral surface). They may thus also further reduce the flanking transmission of sound over the connection point of the partition wall structure and thus also over the partition wall structure that begins at the connection point.
• the branch grooves allow the propagation of sound to be particularly efficiently prevented over the full distance of the branch groove all the way from the beginning of the branch groove, i.e. from the junction between the branch groove and the groove.
• a second branch groove or broken branch groove extending in the height direction of the wood element diverges from said groove, which second branch groove or broken branch groove extends in the longitudinal direction of the wood element to the (fully or partly) opposite direction from said first branch groove or broken branch groove, limiting in the longitudinal direction of the wood element the conduction of sound propagating between said second branch groove or broken branch groove and the first lateral surface towards the second lateral surface.
• said first branch groove or broken branch groove and said second branch groove or broken branch groove are aligned in the lateral direction of the wood element. This allows the propagation of sound to be directed symmetrically.
• said wood element is a log, solid wood panel or composite wood panel formed of parts.
• said wood element is a laminated log. It may comprise one or more first lamellas in a longitudinal direction of the laminated log and two or more second lamellas in the longitudinal direction of the laminated log.
• first lamella or lamellas
• the grain direction is in a height direction of the laminated log and in said two (or more) second lamellas the grain direction is in the longitudinal direction of the laminated log.
• the first lamella may be in a lateral direction of the laminated log between two second lamellas.
• the first and the second lamellas may alternate in the lateral direction of the laminated log.
• said groove extends in the lateral direction of the laminated log through the first lamella. Thus, it may also extend through other lamellas between the first lamella and the second lateral surface.
• said two second lamellas comprise a second lamella on the side of the first lateral surface and a second lamella on the side of the second lateral surface and said first branch groove or broken branch groove, and optionally also said second branch groove or broken branch groove, diverges from the second lamella on the side of the second lateral surface.
• said groove is, in the lateral direction of the wood element, perpendicular against the longitudinal direction of the wood element.
• said wood element has an additional groove extending in the height direction of the wood element, which additional groove extends in the lateral direction of the wood element from the first lateral surface towards the second lateral surface without reaching it, limiting the conduction of sound via the wood element over the connection point of the partition wall structure. There may be one or more of said additional grooves.
• said groove and said additional groove are parallel.
• said groove and said additional groove extend in the longitudinal direction of the wood element to opposite directions, optionally away from each other. Thereby, directing of sound in the wood element may be carried out efficiently, for example by individual cuts.
• a second solution provides a wood structure comprising two or more wood elements according to the first solution (including all embodiments thereof) positioned in a height direction one on top of the other so that grooves of said two or more wood elements are aligned.
• a third solution provides a construction comprising, in addition to the wood element according to the first solution (including all embodiments thereof) or the wood structure according to the second solution, a partition wall structure arranged at the groove for limiting the conduction of sound from one side of the partition wall structure to the other via said wood element or wood structure.
• a fourth solution provides a method for limiting the conduction of sound over a connection point of a partition wall structure in a wood element.
• the method may comprise grooving the wood element in a height direction of the wood element at said connection point. This allows the sound being conducted in the wood element to be directed away from the connection point and the distance through which the sound must propagate in order to be conducted in the wood element over the connection point of the partition wall structure to be extended.
• the conduction of sound along a wood element such as a wall wood element, over a partition wall structure for example from one apartment into another may be limited.
• the solution utilizes a machined groove that does not cut the wood element, such as a log, completely.
• the sound conduction path may thus be guided to the second lateral surface, i.e. outer surface, of the wood element.
• FIG. 1-7 are cross-sectional views seen in a height direction of the wood element (also "vertical direction” or in short “height direction”).
• similar reference numbers represent corresponding or at least functionally corresponding structural parts.
• FIG. 1 illustrates a construction 100 comprising one or more wood elements 110 and a partition wall structure 120.
• Said one or more wood elements may as a whole form a wood structure, such as a wall structure, or part of it.
• Said one or more wood elements may thus comprise two or more wood elements positioned in a height direction one on top of the other to form said wood structure.
• the wall structure may herein be an exterior wall structure.
• Said one or more wood elements and/or wood structure may thus be arranged to separate an indoor space 102, 104 from an outdoor space 106.
• the partition wall structure may in turn be arranged to separate a first indoor space 102 from a second indoor space 104, whereby the partition wall structure may be a compartmenting partition wall structure.
• the first indoor space and the second indoor space may be indoor spaces of different apartments.
• the partition wall structure may be comprise an entire partition wall or part of it.
• the partition wall structure may comprise concrete and/or a block of lightweight aggregate concrete or be formed of it.
• the partition wall structure may also comprise a timber frame wall.
• FIG. 1 illustrates a longitudinal direction 112 and a lateral direction 114 of the wood element 110, which may be in a plane perpendicular to each other, whereby the height direction is perpendicular to that plane (the image plane herein).
• the wood element may be delimited in the height direction by a lower surface and an upper surface which may be matching for example so that they are fit-matched to each other, whereby similar wood elements may be stacked tightly one on top of the other.
• the wood element may be delimited in the lateral direction by a first lateral surface 116 and a second lateral surface 118 which are opposite lateral surfaces (e.g. left side and right side).
• the first and the second lateral surface may be identical or different shaped, for example mirror images of each other.
• the wood element may be flat surfaces, such as vertical surfaces, or curved surfaces.
• the wood element may be in the lateral direction over 10cm wide, for example 20cm or more.
• the width in the lateral direction may correspond to the strength of the wall, such as an exterior wall.
• the wood element may be in the longitudinal direction several meters long, for example at least 2-4 meters or more.
• the wood element 110 may be a solid wood element, a massive wood element, a wood product element, a wood panel element and/or a single-material wood element.
• the wood element may be a log, such as a solid log or a laminated log. It may thus be formed of solid wood material or as a combination of several blocks of wood.
• the log may in either case be a round log or a rectangular log.
• the invention is thus not bound to any specific wood element or log type or to specific wood element or log profile, but is applicable to all wood element types such as a non-settling laminated log, a solid-wood rectangular log as well as a solid-wood or glued round log.
• the wood element may also be another wood element, such as an engineered wood product.
• the wood element may be a panel element, such as a CLT panel ("Cross Laminated Timber" panel), an LVL panel (laminated veneer lumber panel) or a massive wood panel.
• the panel element may be assembled with one or more connection types.
• the panel element may be a panel-type wood element formed by gluing and/or by mechanical connections from timber blocks, veneers, wood chips or other wood fractions.
• the panel element may thus be a solid wood panel or a composite wood panel formed of parts.
• the above-mentioned wood structure may comprise several logs, for example ten or more, stacked one on top of the other to form a vertical wall.
• the panel element may already in itself form the wall and/or said wood structure.
• the height of the wood structure may thus be over one meter.
• the wall may be at a room height, i.e. at least 2 meters or more specifically at least 2.5 meters.
• the partition wall structure may be at a room height.
• the partition wall structure and the wood structure may be equally high, but this is not obligatory, and the wood structure may thus be for example higher than the partition wall structure.
• the height of the wood structure may thus also be at least the floor height, i.e. 3 meters or more. Its height may thus, in addition to the height of the partition wall structure, also comprise the height of the base floor and/or roof structure.
• the wood elements may be pressed together for example by hammering.
• the wood element has a connection point 122 of the partition wall structure at which the partition wall structure 120 is supported and/or fastened to said one or more wood elements 110.
• Said connection point may be at the first lateral surface of the wood element.
• each one may have said connection point, whereby these wood elements may be positioned in the height direction one on top of the other so that their connection points are aligned.
• FIG. 1 illustrates how sound may be conducted 116 in the wood element 110 over the connection point of the partition wall structure from one side of the partition wall structure to the other, i.e. from the first indoor space 102 to the second indoor space 104 or vice versa. Sound may thus travel by conduction horizontally along the wood element, for example from one apartment to another, and this may also be referred to as the flanking transmission of sound.
• the purpose of the proposed embodiments is to limit this conduction, and thus the flanking transmission of sound over the connection point of the partition wall structure.
• the features and references illustrated in FIG. 1 may be part of all following solutions, except for possible exceptions mentioned separately.
• the wood element 110 may extend uninterrupted over the partition wall structure 120.
• FIG. 2a-c illustrate conventional solutions for limiting the above-described conduction of sound.
• the partition wall structure 120 is connected to two separate wood elements 110a, 110b positioned in the longitudinal direction 112 one after the other so that a gap 132 is provided between them in the longitudinal direction 112.
• the first lateral surfaces 116a, 116b, the second lateral surfaces 118a, 118b, and the connection points 122a, 122b of the partition wall structure are separate for these wood elements positioned one after the other. Because the wood elements are not in direct contact to each other, sound is not able to be conducted 130a, 130b via them over the partition wall structure, i.e. from one side to the other.
• the gap also has to be covered for example by a moulding, a board or a follower.
• the covering constitutes a visual impairment. Waterproofing and thermal insulation must in this solution be carefully ensured with pastes, foams and/or wool, and sound insulation must possibly further be ensured with tapes.
• separate wood elements must be installed on each side of the connection point of the partition wall structure.
• FIG. 2b and 2c illustrate another solution, wherein the wood element 110 extends uninterrupted over the partition wall structure 120 but wherein the flanking transmission of sound is limited by one or more additional material layers 134, 134a, 134b.
• the additional material layer is positioned on the first lateral surface 116 of the wood element 110 on both sides ( FIG. 2b : 134a, 134b) or on just one side ( FIG. 2c : 134) of the connection point 122 of the partition wall structure.
• the additional material layer may be chosen on a case-by-case basis, e.g. on the basis of sound insulation properties. This solution, however, increases costs and reduces the first indoor space 102 and/or the second indoor space 104.
• the additional material layer also covers the first lateral surface 116 of the wood element 110, which is often desired to be visible to the indoor space 102, 104.
• FIG. 3a and 3b illustrate an embodiment wherein the wood element 110 has a groove 310 extending in the height direction of the wood element.
• the groove 310 may be linear in its own longitudinal direction.
• the groove 310 may extend in the lateral direction 114 of the wood element from the first lateral surface 116, specifically from the connection point 122 of the partition wall structure 120, towards the second lateral surface 118 without reaching the latter, so that the conduction of sound via the wood element over the connection point 122 of the partition wall structure is limited.
• the conduction 130a, 130b of sound in the wood element over the connection point is prevented and is possible only from between 130c the groove 310 and the second lateral surface 118.
• the conduction of sound thus occurs at a distance from the first lateral surface 116, requiring a longer distance in the wood element (and specifically in its lateral direction 114) on each side of the connection point (in the longitudinal direction 112).
• the groove 310 may thus be used for directing the conduction of sound in the wood element 110 to the vicinity of the outer surface of the wood element and possibly to the outdoor space 106.
• the partition wall structure 120 may be arranged at the groove 310 for limiting the conduction of sound from one side of the partition wall structure 120 to the other via the wood element 110 or the wood structure.
• the groove 310 may begin in the lateral direction 114 of the wood element 110 from the connection point 122 of the partition wall structure 120 for example from the midpoint (in the longitudinal direction 112) or from either side (in the longitudinal direction 112) of the connection point 122.
• the midpoint of the connection point may be positioned along an extension of the midline of the partition wall structure (in the longitudinal direction 112, i.e. the width direction of the partition wall structure), when the partition wall structure is installed at the connection point 122 of the partition wall structure.
• the groove 310 may be a sawn groove and/or a drilled groove. It may be provided by several sawing and/or drilling operations, for example by drilling several holes next to each other. As an alternative or in addition to sawing and/or drilling, it may be provided by milling and/or machining in some other way.
• the groove 310 does not need to be particularly wide (in the longitudinal direction 112), as partial cutting of the wood element 110 by the groove is already sufficient for limiting the conduction of sound.
• the groove may be for example at least 4mm wide, but in some cases even thinner, for example at least 2mm or 3mm.
• the depth of the groove may vary in different applications but, specifically, it may extend in the lateral direction 114 of the wood element over the midpoint the wood element.
• the groove may extend, in its depth direction, in the lateral direction 114 of the wood element 110 and/or be perpendicular against the longitudinal direction 112 of the wood element 110. However, it may also be oblique relative to the lateral direction 114.
• the groove may be, in its depth direction, linear, which also makes it easier to be machined.
• the groove may extend, in the height direction of the wood element 110, to the lower surface and/or upper surface of the wood element. It may have, along its entire length (in the height direction) a constant depth (in its depth direction such as in the lateral direction 114) and/or a constant shape.
• the groove may have a cross-sectional shape (i.e., in a plane defined by its depth and width direction) of a rectangle, but may also have some other shape.
• the groove may be parallel to the height direction, i.e. vertical. In all cases the groove may continue uninterrupted over its entire length, specifically from the lower surface to the upper surface of the wood element.
• two or more wood elements 110 may be positioned in their height direction one on top of the other so that their grooves are aligned, forming a joint groove of the wood structure.
• the properties of the joint groove may include any of the above-mentioned properties of the groove 310.
• the joint groove may be parallel (in its longitudinal direction) to the height direction, i.e. vertical. It may extend in the height direction of the wood elements 110 to the lower surface of the lowermost wood element of the wood structure and/or to the upper surface of the uppermost wood element of the wood structure.
• the joint groove may continue uninterrupted over its entire length (in the height direction of the wood elements 110), specifically from the lower surface of the lowermost wood element of the wood structure to the upper surface of the uppermost wood element of the wood structure. It may have a length (in the height direction of the wood elements 110) of more than half of the height of the wood structure and/or the partition wall structure, for example, it may be equally high as the wood structure and/or the partition wall structure, or even higher than the latter.
• connection point 122 of the partition wall structure 120 may be a recess (or comprise a recess) extending in the height direction of the wood element 110 for embedding the partition wall structure in the lateral direction 114 into the wood element 110.
• the recess may be at the connection point 122 of the partition wall structure 120 equally wide as the partition wall structure (in the longitudinal direction 112) or wider.
• the recess may have a constant width. It may be, in its depth direction, parallel to the lateral direction 114 of the wood element 110.
• the recess may be a rectangle in its cross-section (in the plane of the longitudinal direction 112 and the lateral direction 114), but it may also have another shape, for example narrowing towards the second lateral surface 118.
• the recess may have over its entire length (in the height direction) a constant width (in the lateral direction 114) and/or a constant shape.
• the recess may be parallel to the height direction, i.e. vertical.
• the recess may form part of the first lateral surface 116.
• the groove 310 may begin in the lateral direction 114 of the wood element 110 from said recess, for example from the midpoint (in the longitudinal direction 112) or from either side (in the longitudinal direction 112) of the recess.
• the midpoint of the recess may be along the same line in the lateral direction 114 of the wood element as the midpoint of the connection point 122 of the partition wall structure, whereby the midpoint of the recess may also be positioned along an extension of the midline of the partition wall structure 120, when the partition wall structure is installed at the connection point 122 of the partition wall structure.
• Each wood element 110 of the wood structure may have a separate recess and they may be positioned in alignment for embedding the partition wall structure into the joint recess being formed.
• the properties of the joint recess may thus include any of the above-mentioned properties of the recess.
• the partition wall structure 120 does not, however, have to be necessarily embedded into the wood element 110 or the wood structure, i.e. said recess is not needed in all embodiments, for example when the wood element is a panel element or the wood structure comprises a panel element.
• the first lateral surface 116 may thus, in its cross section (in the plane of the longitudinal direction 112 and the lateral direction 114), continue linearly at the connection point 122 of the partition wall structure 120.
• FIG. 3b also illustrates, in addition to the recess, another alternative embodiment, and either one or both of them may be carried out in the solutions according to the invention.
• the wood elements 110 are laminated logs.
• the wood structure may in this case comprise or consist of laminated logs positioned one on top of the other.
• the laminated log may be a rectangle-shaped, i.e. rectangular laminated log.
• the laminated log may have vertical grain direction lamellas 330 and/or horizontal grain direction lamellas 332.
• the horizontal grain direction lamella 332 means herein a lamella, i.e. a wood plate, in which the wood grain is substantially horizontal when the laminated log is in a horizontal plane.
• the grain may be in this case in the longitudinal direction 112 of the laminated log (i.e. the wood element 110), which is at the same time a longitudinal direction of the raw material timber.
• the vertical grain direction lamella 330 means, correspondingly, a lamella in which the wood grain is substantially vertical when the laminated log is in a horizontal plane.
• the vertical grain direction lamella may be provided by fastening several vertical grain direction wood blocks 334a, 334b one next to the other, for example directly onto each other by gluing. This enables the vertical grain direction lamella to be as long as the horizontal grain direction one, the length of the raw material timber being significantly greater than the width.
• the vertical grain direction lamella 330 may be formed of one wood block 334a, 334b as illustrated in the figure, but alternatively also of two or more wood blocks.
• the vertical grain direction lamella 330 and/or the horizontal grain direction lamella 332 may be formed of one wood block, but alternatively also of two or more wood blocks.
• the laminated log may have a first lamella 330 in the longitudinal direction 112 of the laminated log (i.e. the wood element 110) and two second lamellas 332 in the longitudinal direction 112 of the laminated log.
• the grain direction is in the height direction of the laminated log (i.e. the wood element 110) and in the second lamellas the grain direction is in the longitudinal direction 112 of the laminated log.
• the first lamella is, in the lateral direction 114 of the laminated log (i.e. the wood element 110), between said two second lamellas.
• the first lamella thus forms a height direction load bearing line, and when the wood structure has several laminated logs, their first lamellas may be aligned to form a height direction load bearing line in the height direction of the wood structure, even across the entire wood structure.
• the wood structure may thus be caused to be substantially non-settling compared for example to a structure having only horizontal grain direction logs, as the shrinkage occurring upon drying of the wood is significantly lesser in the vertical direction than in other directions.
• One or both of the horizontal grain direction lamellas 332 may form a lateral outer surface of the laminated log, for example so that the heartwood of the horizontal grain direction lamella opens outwards. This may improve the surface resistance of the structure.
• the laminated log may have for example, between two horizontal grain direction lamellas (in the lateral direction 114), two vertical grain direction lamellas between which there further is at least one horizontal grain direction lamella.
• the properties and alternative embodiments of the laminated log are further illustrated with reference to FIG. 8 .
• the groove 310 and, optionally, the recess may be provided by machining them separately.
• the recess may be machined in the wood element 110 before the groove 310.
• the groove may be adjusted relative to the recess.
• the groove 310 may extend in the lateral direction 114 of the wood element over the midpoint of the wood element.
• the groove may extend in the lateral direction to the first lamella 330, i.e. the vertical grain direction lamella, or over it.
• the first lamella 330 i.e. the vertical grain direction lamella
• the groove may thus extend in the lateral direction of the wood element through the first lamella, and if there are several vertical grain direction lamellas in the laminated log, through all of them.
• FIG. 4a and 4b illustrate an embodiment which may otherwise be as any of the embodiments illustrated in FIG. 3a and 3b , but in which the wood element 110 has an additional groove 312 extending in the height direction of the wood element.
• the additional groove extends in the lateral direction 114 of the wood element from the first lateral surface 116 towards the second lateral surface 118 without reaching it and may thus limit the conduction of sound via the wood element over the connection point 122 of the partition wall structure 120. Any of the features mentioned above concerning the groove 310 may be applied to the additional groove 312. There may also be more than one of such additional grooves.
• the additional grooves may further extend the sound conduction path required by the flanking transmission of sound and thus improve the sound insulation of the solution.
• the additional groove 312 may be, in its own longitudinal direction, linear.
• the additional groove 312 may be parallel to the height direction, i.e. vertical.
• the groove 310 and the additional groove 312 may be equally long but may also have different lengths.
• the additional groove 312 may be equally deep as the groove 310 but may also have a different depth.
• the groove 310 and the additional groove 312 may be parallel, specifically in their longitudinal and/or depth direction, but may also be in different directions.
• the groove and the additional groove may be equally wide but may also have different widths. They may be positioned symmetrically relative to the midpoint of the connection point 122 of the partition wall structure (in the longitudinal direction 112).
• the additional groove 312 may begin in the lateral direction 114 of the wood element 110 from the connection point 122 of the partition wall structure 120, for example from either side of the connection point (in the longitudinal direction 112), whereby the groove 310 may optionally begin in the lateral direction 114 of the wood element 110 from the opposite side of the connection point of the partition wall structure 120, as illustrated in the figure.
• FIG. 4b illustrates the same two alternatives as FIG. 3b in a case where the wood element 110 also has the additional groove 312. Either one or both of the alternatives may thus be carried out in the solutions according to the invention when the wood element has the additional groove.
• the connection point 122 of the partition wall structure 120 is a recess (or comprises a recess).
• the wood elements 110 are laminated logs.
• FIG. 5a and 5b illustrate an embodiment which may otherwise be as any of the embodiments disclosed above, specifically as illustrated with reference to FIG. 4a and 4b , but in which the wood element 110 has said additional groove 312 extending in the height direction of the wood element and in which said additional groove is, in its depth direction, oblique relative to the lateral direction 114 of the wood element 110.
• the groove 310 may be, in its depth direction, oblique relative to the lateral direction 114 of the wood element 110.
• the oblique groove and/or additional groove may extend the sound conduction path required by the flanking transmission of sound relative to the groove/additional groove extending in the lateral direction 114 and thus further improve the sound insulation of the solution.
• the groove 310 and the additional groove(s) 312 may thus extend in the longitudinal direction 112 of the wood element 110 to opposite directions. Specifically, they may extend away from each other, as also illustrated in FIG. 5a and 5b .
• the groove 310 and/or the additional groove(s) 312 may be (in their depth direction) at any angle relative to the lateral direction 114 of the wood element 110, for example at an angle of 20-70 degrees, which may already provide a significant sound directing effect.
• FIG. 5b illustrates the same two alternatives as FIG. 3b and FIG. 4b in a case where the wood element 110 also has the additional groove 312 that is oblique relative to the lateral direction 114. Either one or both of the alternatives may thus be implemented in the solutions according to the invention when the wood element has an oblique additional groove.
• the connection point 122 of the partition wall structure 120 is a recess (or comprises a recess).
• the wood elements 110 are laminated logs. Regardless of whether any additional groove is oblique 312 or not, it may extend through the first lamella 330 and/or over the midpoint of the wood element (in the lateral direction 114 of the wood element), as also discussed above.
• FIG. 6a and 6b illustrate an embodiment which may otherwise be as any of the embodiments disclosed above, but in which a first branch groove 314a extending in the height direction of the wood element diverges from the groove 310, which first branch groove extends to the longitudinal direction 112 of the wood element, limiting in the longitudinal direction of the wood element the conduction of sound propagating between the first branch groove 314a and the first lateral surface 116 towards the second lateral surface 118. This may significantly extend the sound conduction path required by the flanking transmission of sound.
• a second branch groove 314b extending in the height direction of the wood element may diverge from the groove 310, which second branch groove extends in the longitudinal direction 112 of the wood element to the opposite direction from the first branch groove 314a.
• the second branch groove may thus limit in the longitudinal direction 112 of the wood element the conduction of sound propagating between the second branch groove 314b and the first lateral surface 116 towards the second lateral surface 118. This may further significantly extend the sound conduction path required by the flanking transmission of sound.
• the features mentioned above for the groove 310 may be applied to the first branch groove 314a and/or to the second branch groove 314b.
• the first branch groove 314a and/or the second branch groove 314b may be, in their own longitudinal direction, linear.
• the first branch groove 314a and/or the second branch groove 314b may be parallel (in their longitudinal direction) to the height direction, i.e. vertical.
• the first branch groove 314a and/or the second branch groove 314b may be parallel (in their own longitudinal direction) to the groove 310 (to the groove's own longitudinal direction).
• the first branch groove 314a and/or the second branch groove 314b may be parallel (in their depth direction) to the longitudinal direction 112, but also oblique relative to the longitudinal direction.
• the first branch groove 314a and/or the second branch groove 314b may be thinner (in their width direction) than the groove 310.
• the first branch groove 314a and/or the second branch groove 314b may begin from the bottom of the groove 310 as illustrated in the figures, but also from another part of the groove.
• the first branch groove 314a and/or the second branch groove 314b may be a sawn groove and/or a drilled groove. It may be provided by several sawing and/or drilling operations. As an alternative or in addition to sawing and/or drilling, either one or both of the branch grooves may be provided by milling and/or machining in some other way .
• the depth of the first branch groove 314a and/or the second branch groove 314b may vary in different applications but, specifically, it may be equally deep or deeper than the groove 310, for example at least two times as deep as the groove 310. When the groove 310 thus extends over the midpoint of the wood element 110, a diversion wider than the wood element is already obtained with a single branch groove.
• the depth of the first branch groove 314a and/or the second branch groove 314b may also be quite large, even one meter or more. By deepening the branch groove, the sound conduction path may be extended and thus the sound being conducted can be attenuated.
• the depth of the branch groove may be optimized for each case according to the usage of the building and its airborne sound insulation requirements.
• the first branch groove 314a and the second branch groove 314b may be equally deep or either one may be deeper than the other.
• the first branch groove 314a and/or the second branch groove 314b may be, in the depth direction, linear, which also facilitates its machining.
• the first branch groove 314a and/or the second branch groove 314b may, in the height direction of the wood element 110, extend to the lower surface and/or to the upper surface of the wood element. It may have, along its entire length (in the height direction), a constant depth (in its depth direction, such as in the longitudinal direction 112) and/or a constant shape.
• the first and/or the second branch groove may have a cross-sectional shape (i.e., in a plane defined by its depth and lateral direction) of a rectangle, but also some other shape. In all cases the first branch groove 314a and/or the second branch groove 314b may continue uninterrupted over its entire length, specifically from the lower surface to the upper surface of the wood element.
• the first branch groove 314a and the second branch groove 314b may be parallel in their depth direction (the longitudinal direction 112 in the figures) and/or in their longitudinal direction (perpendicular against the plane formed by the longitudinal direction 112 and the lateral direction 114 in the figures). They may be equally wide but may also have different widths.
• the first branch groove 314a and the second branch groove 314b may be equally long (in the height direction), but may also have different lengths.
• the first branch groove 314a may be equally deep as the second branch groove 314b but may also have a different depth.
• the first branch groove 314a and the second branch groove 314b may be aligned in the lateral direction 114 of the wood element 110, but may also be offset. Specifically, they may thus begin from the same point of the groove 310 in the lateral direction 114 of the wood element, as also illustrated in the figures, but they may also begin from different points.
• two or more wood elements 110 may be positioned in their height direction one on top of the other so that their branch groove(s) (such as the first branch groove 314a and/or the second branch groove 314b) are aligned, forming a first and/or a second joint branch groove of the wood structure.
• the properties of the joint branch groove may include any of the above-mentioned properties of the first and/or the second branch groove 314a, 314b.
• the joint branch groove may be parallel (in its longitudinal direction) to the height direction, i.e. vertical. It may, in the height direction of the wood elements 110, extend to the lower surface of the lowermost wood element of the wood structure and/or to the upper surface of the uppermost wood element of the wood structure.
• the joint branch groove(s) may continue uninterrupted over the entire length thereof (in the height direction of the wood elements 110), specifically from the lower surface of the lowermost wood element of the wood structure to the upper surface of the uppermost wood element of the wood structure. It may have a length (in the height direction of the wood elements 110) of more than half of the height of the wood structure and/or the partition wall structure, for example it may be equally high as the wood structure and/or the partition wall structure or even higher than the latter.
• FIG. 6b illustrates the same two alternatives as FIG. 3b , FIG. 4b and FIG. 5b in a case where the wood element 110 has also the first and/or the second branch groove 314a, 314b. Either one or both of the alternatives may thus be carried out in the solutions according to the invention when the wood element has one or more branch grooves.
• the connection point 122 of the partition wall structure 120 is a recess (or comprises a recess).
• the wood elements 110 are laminated logs.
• the first branch groove 314a and/or the second branch groove 314b may begin from the groove 310 at the first lamella 330 or either one of the second lamellas 332. Specifically, the first branch groove 314a and/or the second branch groove 314b may begin from the groove 310. In all cases, said two second lamellas 332 may comprise a second lamella on the side of the first lateral surface 116 and a second lamella on the side of the second lateral surface 118, whereby the first branch groove 314a and/or the second branch groove 314b may diverge from the second lamella on the side of the second lateral surface.
• This lamella may be on the outer surface of the wood element 110, whereby the first branch groove 314a and/or the second branch groove 314b may direct the conduction of sound in the wood element to the vicinity of the outer surface of the wood element and possibly to the outdoor space 106. In all cases, the first branch groove 314a and/or the second branch groove 314b may diverge from the groove 310 between the midpoint of the wood element 110 (in the lateral direction 114) and the second lateral surface 118.
• the groove 310 and/or additional groove(s) may further be filled, partly or fully, with sealing material, such as thermal insulation material, for example in connection with installation or already during manufacture of the wood element.
• sealing material such as thermal insulation material
• first branch groove 314a and/or the second branch groove 314b and also to possible other branch grooves.
• the wood element 110, the wood structure and/or the construction 100 may be considered to also comprise this sealing material.
• the sealing material may comprise sealing paste and/or urethane, such as polyurethane. Sealing may thus be carried out for example with (poly)urethane foam. No sound insulation material, however, needs to be added.
• the additional groove 312 and/or the branch groove(s) may be made by separate machining.
• the first branch groove 314a and/or the second branch groove 314b may be machined into the wood element 110 after the groove 310. This way the branch groove(s) may be adjusted relative to the groove.
• FIG. 6c and 6d illustrate an embodiment which may otherwise be as any of the embodiments disclosed above, but in which a first broken branch groove 318a extending in the height direction of the wood element diverges from the groove 310, which first broken branch groove extends to the longitudinal direction 112 of the wood element, limiting in the longitudinal direction of the wood element the conduction of sound propagating between the first broken branch groove 318a and the first lateral surface 116 towards the second lateral surface 118. This may significantly extend the sound conduction path required by the flanking transmission of sound.
• a second broken branch groove 318b extending in the height direction of the wood element may diverge from the groove 310, which second broken branch groove extends in the longitudinal direction 112 of the wood element to the opposite direction from the first broken branch groove 318a.
• the second broken branch groove may thus limit in the longitudinal direction 112 of the wood element the conduction of sound propagating between the second broken branch groove 318b and the first lateral surface 116 towards the second lateral surface 118. This may further significantly extend the sound conduction path required by the flanking transmission of sound.
• the features mentioned above for the branch grooves may be applied to the broken branch grooves (specifically the first broken branch groove 318a and/or the second broken branch groove 318b).
• the broken branch groove differs from the branch groove in that in its depth direction (which may be in the plane defined by the longitudinal direction 112 and the lateral direction 114 of the wood element, for example parallel to the longitudinal direction 112) there are one or more breaks 319a, 319b.
• the break forms, in the wood element, a neck and although sound may be conducted in the wood element via this neck, it may be efficiently limited by limiting the size of the neck. This break may be at the beginning of the broken branch groove, as illustrated in Fig.
• one or more breaks may alternatively or additionally also be in the middle of the broken branch groove (i.e. at a distance from the beginning or end of the broken branch groove).
• the broken branch groove may thus be connected to the groove 310 via the break.
• the broken branch groove thus comprises one or more side grooves beginning from the break and extending in the depth direction thereof away from the groove 310 (for example parallel to the longitudinal direction 112). The features mentioned above for the groove 310 and/or the branch grooves 314a, 314b may be applied to these side grooves.
• the break 319a, 319b may be integrated with the other surrounding wood material, i.e. it may be of the same material. It may be provided simply by not grooving the wood material at the break.
• the broken branch groove (such as the first broken branch groove 318a and/or the second branch groove 318b) may extend in the height direction of the wood element 110 to the lower surface and/or upper surface of the wood element, whereby it can be machined via said lower surface and/or upper surface.
• the machining may be done using any means mentioned with reference to the machining of the groove and/or the branch grooves.
• the breaks and thereby the necks may be formed for example between sawn and/or drilled sections provided in the vertical direction of the wood element.
• two or more wood elements 110 may be positioned in their height direction one on top of the other so that their broken branch groove(s) (such as the first broken branch groove 318a and/or the second broken branch groove 318b) are aligned, forming a first and/or a second joint broken branch groove of the wood structure.
• the properties of the joint broken branch groove may include any of the above-mentioned properties of the first and/or the second broken branch groove 318a, 318b.
• FIG. 7a and 7b illustrate an embodiment which may otherwise be as any of the embodiments disclosed above but in which a drilled section 316 is provided at the groove 310 (and/or the additional groove 312 and/or the branch groove 314a, 314b.
• the drilled section may facilitate the forming of the groove/additional groove/branch groove.
• the drilled section may also be filled with thermal insulation, such as polyurethane foam or mineral wool.
• the thermal insulation may be elastic, so that it spreads from the drilled section 316 to the rest of the groove 310.
• the drilled section may thus improve the thermal insulation of the wood element 110, specifically when the sawn groove 310 is narrow, e.g. only as wide as the saw blade.
• the groove 310 may for example be made thinner.
• the groove 310 may thereby be for example of the same width as the first branch groove 314a and/or the second branch groove 314b.
• the drilled section 316 may be provided through the wood element 110. It may have a diameter of several centimetres, for example at least 2cm, 3cm or 4cm.
• FIG. 7b illustrates the same two alternatives as FIG. 3b , FIG. 4b , FIG. 5b and FIG. 6b in a case where the wood element 110 has the above-mentioned drilled section 316.
• Either one or both of the alternatives may thus be carried out in the solutions according to the invention when the wood element has one or more drilled sections 316.
• the connection point 122 of the partition wall structure 120 is a recess (or comprises a recess).
• the wood elements 110 are laminated logs.
• the drilled section 316 may thereby be at least in the first lamella 330, i.e. the vertical lamella.
• FIG. 8 illustrates an example of a laminated log as the wood element 110.
• the laminated log is illustrated in cross-section in the plane of the lateral direction 114 and height direction 802 of the wood element 110.
• the laminated log is obtained by attaching two or more individual lamellas 810a, 810b, 820a, 820b, 830a, 830b to each other.
• the lamellas may be substantially entirely of wood.
• the lateral surfaces of the lamellas may be substantially vertical, which may be achieved for example by planing.
• the lamella 810a, 810b, 830a, 830b situated on the outer surface of the laminated log may alternatively be also curved along its outer lateral surface.
• One laminated log typically has at least two layers of lamellas in the lateral direction 114. In the figure there are three such layers in the lateral direction. In a height direction 802 the laminated log may be formed of one layer, but alternatively also of two or more layers. In the figure there are two such layers in the height direction.
• the lamellas may be attached to each other by gluing, whereby twisting and/or cracking of the logs may be reduced.
• horizontal grain direction and vertical grain direction lamellas are glued together in the laminated log, a cross-laminated log is provided.
• the lamellas in the same layer of the laminated log (horizontal grain direction lamellas and/or) vertical grain direction lamellas) may be substantially equally long (in the longitudinal direction 112).
• They may also be substantially equally high (in the height direction 802), whereby their upper and lower surfaces may lie substantially flush with each other. They may further be substantially equally wide, as in the figure, but specifically in the lateral direction 802 also many other structures are possible. Structures such as tongues and grooves 840, 842 may be formed in the upper and/or lower surfaces of the laminated log. The tongue or groove may further have a space 850 for a sealing. The sealing space 850 may extend substantially over the whole length of the laminated log.
• the laminated log may have a length of several meters.
• the width of the laminated log may be less than half a meter, for example approximately 20 centimetres plus/minus 0-10 centimetres.
• the total height of an individual laminated log 100 may be for example approximately 27 centimetres plus/minus 0-10 centimetres, which may consist for example of two layers of lamellas.
• the rise of the laminated log may be slightly less than the total height, for example 26 centimetres plus/minus 0-10 centimetres.
• the laminated log has two layers of lamellas in the height direction 802 (e.g. layer 810a+820a+830a and layer 810b+820b+830b), but they may also be implemented with one or more than two layers in the height direction.
• there are three or more layers in the lateral direction 114 e.g. layer 810a+810b, layer 820a+820b and layer 830a+830b
• Load bearing lines in the height direction may be formed in this structure for instance using screws and rods passing through the wood structure in the height direction.
• a second example there are three layers in the lateral direction 114, with vertical grain direction lamella(s) in the middle layer (e.g. layer 820a+820b) and horizontal grain direction lamella(s) in the layers closest to the sides (e.g. layer 810a+810b and layer 830a+830b).
• this structure there may be one or more load bearing lines in the height direction, comprising a load bearing line formed at the vertical grain direction layer, which may extend through the wood structure.
• the structure may have in the lateral direction 114 alternate layers with horizontal grain direction and vertical grain direction lamella(s), for example at least three horizontal grain direction layers and two vertical layers.
• the structure there may be two or more load bearing lines in the height direction and they may comprise load bearing lines formed at the vertical grain direction layers, which may extend through the wood structure.
• the vertical grain direction lamellas may be positioned symmetrically relative to the vertical line dividing the laminated log in the middle.
• one vertical grain direction lamella may be on this midline of the laminated log.
• the vertical grain direction lamellas may be symmetrically on different sides of the midline.
• FIG. 3b , FIG. 4b , FIG. 5b , FIG. 6b , FIG. 6d and FIG. 7b illustrate a recess provided in the wood element 110.
• a solution having a recess may specifically be utilized when the wood element is a log, such as for example any of the above-described laminated logs.
• the partition wall structure 120 may thereby be connected to the wood element or to the wood structure formed using it, such as an exterior wall, so that said recess is machined into the wood element/wood structure, for example already at the factory, and the partition wall structure may be embedded into the recess at one end.
• FIG. 3a , FIG. 4a , FIG. 5a , FIG. 6a , FIG. 6c and FIG. 7a illustrate a solution having no recess.
• the wood element is a panel element, such as for example any of the above-described panel elements.
• the wood element may be an element that is uninterrupted in the height direction, such as any panel element, for example over the room height. In this case no seams are formed between the partition wall structure and the wood element, whereby there is no need to cover the seams by embedding.
• FIG. 9 illustrates a method 900 for limiting the conduction of sound over a connection point 122 of a partition wall structure 120 in a wood element 110.
• the method comprises grooving the wood element 110 in a height direction of the wood element at said connection point.
• the grooving may comprise forming any of the above-mentioned grooves 310 and/or additional grooves 312. It may also comprise forming the first branch groove 314a and/or the second branch groove 314b.
• the grooving may be done by any of the above-described means, such as by sawing and/or drilling.
• the drilled section 316 may be provided before the groove 310.
• the drilled section 316 and the above-mentioned recess are made first by optional separate machining. Then the groove 310 is machined separately with possible additional grooves 312 and finally the branch groove(s) are machined separately.
• the method may also comprise the above-described sealing, i.e. filling the groove 310 and/or any of the additional grooves 312 and branch grooves 314a, 314b, partly or fully, with said sealing material. Further, the method may comprise forming the above-described construction.
• Numerals such as 'first', 'second' and so on, are used in this text simply to differentiate between elements having otherwise similar names. The numerals should not be interpreted to indicate any particular order, such as the order of preference, manufacture or presence in any specific structure.

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