EP3309315B1 - Laminated log - Google Patents
Laminated log Download PDFInfo
- Publication number
- EP3309315B1 EP3309315B1 EP17194729.4A EP17194729A EP3309315B1 EP 3309315 B1 EP3309315 B1 EP 3309315B1 EP 17194729 A EP17194729 A EP 17194729A EP 3309315 B1 EP3309315 B1 EP 3309315B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamella
- sealing groove
- log
- laminated
- vertical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 241000446313 Lamella Species 0.000 claims description 122
- 238000007789 sealing Methods 0.000 claims description 74
- 239000002023 wood Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004035 construction material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
Images
Classifications
-
- 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
- E04C3/122—Laminated
-
- 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
Definitions
- the invention relates to a laminated log, which has a first surface lamella, a second surface lamella, and at least one vertical lamella between the first surface lamella and the second surface lamella, the direction of the wood grains in the vertical lamella being substantially perpendicular to the longitudinal direction of the laminated log, and a lower surface, in which there is a first sealing groove for receiving a seam seal.
- Massive log has long been used as a material in house construction.
- Log construction is a traditional method of construction with several special characteristics. The construction method makes possible, for example, the fast erection of the building frame and, when needed, fast dismantling and reassembly.
- Log functions as the bearing frame of the building and, at the same time, as heat and sound insulation. Massive log has the ability to store heat and moisture and release these back to room air. Because of the special characteristics of log buildings, massive log is a desired and valued construction material.
- a problem with log buildings is the shrinkage caused by the drying of logs, which causes the log walls to settle.
- the settling of walls causes problems, among others, in the realization of joints between the unsettling sections of the building frame and the settling walls.
- the contraction of logs in the transverse direction can be significantly reduced by arranging one or several vertical lamellas between the surface lamellas of the laminated log, the wood grains of the vertical lamella being perpendicular to the longitudinal direction of the log.
- Such laminated logs have been described, for example, in the specifications EP 0380057 , EP 0226567 and DE 29923387 U1 .
- a problem with logs equipped with vertical lamellas is the realization of the sealing of the seam between the logs.
- DE 101 53 914 A1 discloses a laminated log according to the preamble of independent claim 1. It is an object of the invention to introduce a laminated log, with which drawbacks and disadvantages relating to the prior art can be reduced.
- the object of the invention is a laminated log, which has a first surface lamella, a second surface lamella, and at least one vertical lamella between the first surface lamella and the second surface lamella, the direction of wood grains of the vertical lamella being substantially perpendicular to the longitudinal direction of the laminated log.
- the laminated log has a lower surface, in which there is a first sealing groove for receiving a seam seal.
- the first sealing groove is in the boundary surface of the first surface lamella and the vertical lamella.
- the lower surface also has a second sealing groove for receiving a seam seal, the second sealing groove being located in the boundary surface of the second surface lamella and a vertical lamella.
- the sealing grooves are located for their major part in the vertical lamella.
- Drying shrinkage occurs considerably less in the vertical lamella than in the surface lamellas, in which the grain direction is parallel to the longitudinal direction of the log. Because of this, the sealing groove formed partly in the vertical lamella retains its original form relatively well as the laminated log dries, and the seam seal arranged in the sealing groove can close the seam between the logs.
- the lower surface has at least two slits with a bottom surface.
- the first sealing groove is formed to the bottom surface of the first slit and the second sealing groove is formed to the bottom surface of the second slit as a groove extending from the plane of the bottom surface towards the inner part of the log.
- Laminated logs typically have an upper surface, which has ribs with a ridge surface. The width of the ridge surface is substantially equal to the width of the bottom surface of the slit.
- the ribs of the lower laminated log are set in the slits of the upper laminated log so that the ridge surface of the ribs is set against the bottom surface of the slits.
- the width of the bottom surface is substantially bigger than the width of the first or second sealing groove.
- the width of the bottom surface of the slits refers to the width of the bottom surface before the forming of the sealing groove; in other words, the smallest distance between the slit flanks.
- the sealing groove removes part of the bottom surface, but a strip of the bottom surface remains in the edge of the sealing groove, setting against the ridge surface of the rib.
- the seam seal in the sealing groove is not entirely flattened even though the ridge surface of the ribs were to press against the bottom surface of the slit. Thus, the seam seal retains its deformation characteristics.
- the cross-sectional form of the first and/or second sealing groove comprises a part of the arc of a circle.
- the cross-sectional form of the sealing groove can thus be, for example, a semi-circle or a downwards opening U form.
- a seam seal in at least one sealing groove, made of elastic, compressible material, such as polyethylene.
- the seam seal has preferably a circular cross-section and before contraction the diameter of the seam seal is bigger than the largest width of the sealing groove.
- the seam seal with circular cross-section fills well the sealing groove, the cross-sectional form of which comprises a part of the arc of a circle.
- the compressible seal can be fitted into a groove, which is slightly smaller than the cross-sectional measures of the seal so that it stays in place in the sealing groove, due to the compression force and friction affecting on the contact surfaces.
- the laminated log of the invention there are at least two vertical lamellas with an intermediary lamella between them.
- the direction of the wood grains is substantially the same as the longitudinal direction of the laminated log.
- the thickness of the laminated log can be grown by the intermediary lamella by simultaneously keeping the widths of individual lamellas reasonable.
- the width of the surface lamella is unequal to the width of the vertical lamella.
- the width of the intermediary lamella is also unequal to the width of the vertical lamella and/or surface lamella.
- the width of the lamella refers here to the measure of the laminated log in the lateral direction, i.e. perpendicular to the side surface of the lamellas.
- the surface lamellas and vertical lamella/vertical lamellas are massive wood or they are constructed of wooden material parts joined together.
- the groove formed to the seam seal retains well its shape and that the seam between superimposed laminated logs does not broaden by the sealing groove as the log dries.
- the seam seal to be installed into the sealing groove retains its sealing ability, even though considerable drying were to occur in the surface lamellas.
- FIG. 1a there is illustrated in an exemplary manner a cross-sectional view of a laminated log of the invention.
- a laminated log is a generally known longitudinal structural part, in the cross-section of which there can be distinguished a first side surface 30, a second side surface 32, an upper surface 28 and a lower surface 18.
- the first and second surface are on opposite sides of the cross-section; likewise, the upper surface and lower surface are on opposite sides of the cross-section.
- the side surfaces form the surfaces of the wall remaining visible.
- the lower surface of the log there are two slits 24 extending in the longitudinal direction of the log, and in the upper surface of the log there are two ribs 34, the shape and size of which are compatible with the slits.
- the ribs of the lower log are set in the slits of the upper log.
- a double tongue-and-slit joint is thus formed into the seam between the superimposed laminated logs.
- the upper and lower surface are substantially flat.
- the laminated log illustrated in Figure 1a is formed of three lamellas glued together.
- the first surface lamella 10 forms the first edge part of the laminated log
- the second surface lamella 12 forms the second edge part of the laminated log.
- the material of the surface lamellas and the vertical lamella is massive wood.
- the direction of the wood grains is substantially parallel to the longitudinal direction of the laminated log.
- the direction of the wood grains is substantially perpendicular to the plane of the upper surface and lower surface of the laminated log and also perpendicular to the longitudinal direction of the laminated log.
- the vertical lamella consists of a number of short planks placed adjacent to each other and glued from their edge surfaces to the surface lamellas, i.e. there is a glue joint between the first surface lamella and the vertical lamella and between the second surface lamella and the vertical lamella.
- the parallel planks of the vertical lamella are attached to each other from their boundary surfaces. There can be a glue joint between the contacting boundary surfaces.
- the height of the lamellas is equal to the height of the entire log cross-section, i.e. they extend from the lower surface 18 of the log to the upper surface 28 of the log.
- a slit 24 By the boundary surface of the first surface lamella 10 and the vertical lamella 14 of the laminated log of the invention there is a slit 24, which has a bottom surface 26.
- This bottom surface has a first sealing groove 20 parallel to the slit so that the major part of the sealing groove is located in the vertical lamella 14.
- a small part of the sealing groove extents over the boundary surface of the lamellas up to the first surface lamella.
- the boundary surface of the second surface lamella 12 and the vertical lamella there is a slit with the second sealing groove 22 in the bottom surface.
- the cross-section of the sealing grooves is the shape of a part of an arc of a circle so that when moving from the open edge of the sealing groove towards the bottom of the sealing groove, the width of the sealing groove first grows, after which it starts to reduce.
- the biggest width of the cross-section of the sealing groove is thus slightly bigger than the width of the open edge of the sealing groove.
- the sealing groove can also have an equally wide mouth part and a curved bottom part.
- a seam seal 21 with a round cross-section is placed into the sealing groove.
- the seam seal is a band-type part made of elastic, closed-cell material, preferably polyethylene.
- the seam seal can be closed, or in its middle there can be one or several cavities extending in the longitudinal direction of the seam seal.
- the diameter of the seam seal is slightly bigger than the biggest diameter of the sealing groove.
- the diameter of the seam seal is 14 mm.
- the seam seals are attached to the laminated log simply by pressing them in place into the sealing grooves. During the installation, the flexible seam seal compresses slightly so that it fits to travel through the open edge of the sealing groove into the sealing groove. After reaching the inside of the sealing groove, the seam seal tends to resume its original size, i.e. it expands filling substantially the entire sealing groove. Part of the seam seal extends through the open edge outside the sealing groove over the plane of the bottom surface 26 of the slit into the slit 24. The surface of this part of the seam seal extending outside the sealing groove sets against the ridge surface 36 of the rib 34 in the outer surface of the laminated log lower in the complete log wall.
- the laminated logs are piled layer upon layer on top of each other so that the lower surface of the log upper in the wall is set against the upper surface of the log below it so that the ribs of the lower log are settled into the slits of the upper log.
- the sealing grooves in the bottom surfaces of the slits and the seam seals in them are then set at a distance from each other so that the first sealing groove 20 and the seam seal 21 are at the first edge of the vertical lamella 14 and the second sealing groove and the seam seal are at the second edge of the vertical lamella.
- the compression resistance of the vertical lamellas is bigger and the deformation ability is smaller than in the surface lamellas so that in the complete log wall, the vertical lamellas of the superimposed laminated logs are pressed tightly against each other.
- the seam seals in the first and second sealing groove seal the seam surface between the vertical lamellas from their both edges.
- the seam seals 21 contract slightly in the sealing grooves 20, 22.
- the elastic seam seal tends to resume its original size so that the surface of the seam seal sets tightly against the ridge surface 36 of the rib.
- the width of the sealing groove is substantially smaller than the width of the bottom surface 26 of the slit and the ridge surface 36 of the rib. This ensures that the rib does not have room to press inside the sealing groove, but the ridge surface of the rib sets against the bottom surface of the slit.
- the seam seal in the sealing groove can thus not flatten too much, but it retains always its elastic deformation ability.
- the laminated log has a first surface lamella 10, a second surface lamella 12 and two vertical lamellas 14 between the surface lamellas, with an intermediary lamella 16 between them.
- the material of all lamellas is massive wood.
- the direction of the wood grains is substantially the same as the longitudinal direction of the laminated log.
- the direction of the wood grains is substantially perpendicular to the plane of the upper surface and lower surface of the laminated log and perpendicular to the longitudinal direction of the laminated log.
- first sealing groove 20 is formed at the boundary surface between the first surface lamella 10 and the adjacent first vertical lamella 14, mainly to the first vertical lamella 14; and the second sealing groove 22 is formed at the boundary surface of the second surface lamella 12 and the adjacent second vertical lamella, mainly to the second vertical lamella. Seam seals 21 are installed into the sealing grooves.
- the laminated log of the invention is manufactured of a laminated log according to the prior art, in which it is possible to distinguish the first and second surface lamella with at least one vertical lamella between them.
- At least one sealing groove is formed to the lower surface of such a log, at the boundary surface of the vertical lamella and surface lamella by using a suitable wood-working method, such as planning or milling.
- the seam seal can be installed in place into the sealing groove in any suitable process step following the forming of the sealing groove. It is easiest to install the seam seal in place at the log house factory so that it is no longer necessary to worry about the installation of the seam seal at the erection site of the log building.
- the seam seal installed in place into the laminated log is protected at the bottom of the slit of the lower surface so that no mechanical stresses are applied to the seam seal during the transportation of the logs, which might harm the seam seal or detach it from the sealing groove.
- keeping the seam seal in place in the sealing groove can be ensured by dispensing glue into the sealing groove before installing the seam seal in place so that a glue joint is produced between the seam seal and the surface of the sealing groove. It is not necessary to install the seam seal in place at the log house factory, but the installation can be made also outside the factory area, such as at the erection site of the log building.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Load-Bearing And Curtain Walls (AREA)
Description
- The invention relates to a laminated log, which has a first surface lamella, a second surface lamella, and at least one vertical lamella between the first surface lamella and the second surface lamella, the direction of the wood grains in the vertical lamella being substantially perpendicular to the longitudinal direction of the laminated log, and a lower surface, in which there is a first sealing groove for receiving a seam seal.
- Massive log has long been used as a material in house construction. Log construction is a traditional method of construction with several special characteristics. The construction method makes possible, for example, the fast erection of the building frame and, when needed, fast dismantling and reassembly. Log functions as the bearing frame of the building and, at the same time, as heat and sound insulation. Massive log has the ability to store heat and moisture and release these back to room air. Because of the special characteristics of log buildings, massive log is a desired and valued construction material.
- A problem with log buildings is the shrinkage caused by the drying of logs, which causes the log walls to settle. The settling of walls causes problems, among others, in the realization of joints between the unsettling sections of the building frame and the settling walls. The contraction of logs in the transverse direction can be significantly reduced by arranging one or several vertical lamellas between the surface lamellas of the laminated log, the wood grains of the vertical lamella being perpendicular to the longitudinal direction of the log. Such laminated logs have been described, for example, in the specifications
EP 0380057 ,EP 0226567 andDE 29923387 U1 . A problem with logs equipped with vertical lamellas is the realization of the sealing of the seam between the logs. When they dry, vertical lamellas shrink clearly less than surface lamellas, in which the grain direction is the same as the longitudinal direction of the laminated log. Because of this, the seam between the surface lamellas in superimposed laminated logs broadens as the log dries so that the seals arranged between the surface lamellas are not able to efficiently seal the seam. -
DE 101 53 914 A1 discloses a laminated log according to the preamble of independent claim 1. It is an object of the invention to introduce a laminated log, with which drawbacks and disadvantages relating to the prior art can be reduced. - The objects of the invention are achieved with a laminated log, which is characterized in what is presented in the independent patent claim. Some advantageous embodiments are shown in the dependent patent claims.
- The object of the invention is a laminated log, which has a first surface lamella, a second surface lamella, and at least one vertical lamella between the first surface lamella and the second surface lamella, the direction of wood grains of the vertical lamella being substantially perpendicular to the longitudinal direction of the laminated log. The laminated log has a lower surface, in which there is a first sealing groove for receiving a seam seal. The first sealing groove is in the boundary surface of the first surface lamella and the vertical lamella. Preferably the lower surface also has a second sealing groove for receiving a seam seal, the second sealing groove being located in the boundary surface of the second surface lamella and a vertical lamella. The sealing grooves are located for their major part in the vertical lamella.
- Drying shrinkage occurs considerably less in the vertical lamella than in the surface lamellas, in which the grain direction is parallel to the longitudinal direction of the log. Because of this, the sealing groove formed partly in the vertical lamella retains its original form relatively well as the laminated log dries, and the seam seal arranged in the sealing groove can close the seam between the logs.
- In an advantageous embodiment of the laminated log of the invention the lower surface has at least two slits with a bottom surface. The first sealing groove is formed to the bottom surface of the first slit and the second sealing groove is formed to the bottom surface of the second slit as a groove extending from the plane of the bottom surface towards the inner part of the log. Laminated logs typically have an upper surface, which has ribs with a ridge surface. The width of the ridge surface is substantially equal to the width of the bottom surface of the slit. In a log wall, the ribs of the lower laminated log are set in the slits of the upper laminated log so that the ridge surface of the ribs is set against the bottom surface of the slits. Preferably, the width of the bottom surface is substantially bigger than the width of the first or second sealing groove. The width of the bottom surface of the slits refers to the width of the bottom surface before the forming of the sealing groove; in other words, the smallest distance between the slit flanks. The sealing groove removes part of the bottom surface, but a strip of the bottom surface remains in the edge of the sealing groove, setting against the ridge surface of the rib. In the laminated log of the invention, the seam seal in the sealing groove is not entirely flattened even though the ridge surface of the ribs were to press against the bottom surface of the slit. Thus, the seam seal retains its deformation characteristics.
- In a second advantageous embodiment of the laminated log of the invention the cross-sectional form of the first and/or second sealing groove comprises a part of the arc of a circle. The cross-sectional form of the sealing groove can thus be, for example, a semi-circle or a downwards opening U form.
- In a third advantageous embodiment of the laminated log of the invention there is a seam seal in at least one sealing groove, made of elastic, compressible material, such as polyethylene. The seam seal has preferably a circular cross-section and before contraction the diameter of the seam seal is bigger than the largest width of the sealing groove. The seam seal with circular cross-section fills well the sealing groove, the cross-sectional form of which comprises a part of the arc of a circle. The compressible seal can be fitted into a groove, which is slightly smaller than the cross-sectional measures of the seal so that it stays in place in the sealing groove, due to the compression force and friction affecting on the contact surfaces.
- In yet another advantageous embodiment of the laminated log of the invention there are at least two vertical lamellas with an intermediary lamella between them. In the intermediary lamella, the direction of the wood grains is substantially the same as the longitudinal direction of the laminated log. The thickness of the laminated log can be grown by the intermediary lamella by simultaneously keeping the widths of individual lamellas reasonable. By arranging the grain direction of the intermediary lamellas to be the same as the longitudinal direction of the laminated log, sufficient flexural endurance is achieved for the laminated log.
- In yet another advantageous embodiment of the laminated log of the invention the width of the surface lamella is unequal to the width of the vertical lamella. Preferably, the width of the intermediary lamella is also unequal to the width of the vertical lamella and/or surface lamella. The width of the lamella refers here to the measure of the laminated log in the lateral direction, i.e. perpendicular to the side surface of the lamellas. By varying the width of the lamellas of the laminated log, the transverse compression resistance and flexural resistance of the laminated log can be optimized, nevertheless, without increasing too much the total width of the laminated log.
- In yet another advantageous embodiment of the laminated log of the invention the surface lamellas and vertical lamella/vertical lamellas are massive wood or they are constructed of wooden material parts joined together.
- It is an advantage of the laminated log of the invention that the groove formed to the seam seal retains well its shape and that the seam between superimposed laminated logs does not broaden by the sealing groove as the log dries. Thus the seam seal to be installed into the sealing groove retains its sealing ability, even though considerable drying were to occur in the surface lamellas.
- The invention is next explained in detail, referring to the attached drawings, in which
-
Figure 1a illustrates in an exemplary manner a laminated log of the invention as a cross-sectional view, and -
Figure 1b illustrates in an exemplary manner an advantageous embodiment of a laminated log of the invention as a cross-sectional view. - In
Figure 1a there is illustrated in an exemplary manner a cross-sectional view of a laminated log of the invention. A laminated log is a generally known longitudinal structural part, in the cross-section of which there can be distinguished afirst side surface 30, asecond side surface 32, anupper surface 28 and alower surface 18. The first and second surface are on opposite sides of the cross-section; likewise, the upper surface and lower surface are on opposite sides of the cross-section. In a complete wall structure the side surfaces form the surfaces of the wall remaining visible. In the lower surface of the log there are twoslits 24 extending in the longitudinal direction of the log, and in the upper surface of the log there are tworibs 34, the shape and size of which are compatible with the slits. When laminated logs are piled on top of each other, the ribs of the lower log are set in the slits of the upper log. A double tongue-and-slit joint is thus formed into the seam between the superimposed laminated logs. On the area between the slits and ribs, the upper and lower surface are substantially flat. - The laminated log illustrated in
Figure 1a is formed of three lamellas glued together. Thefirst surface lamella 10 forms the first edge part of the laminated log, and thesecond surface lamella 12 forms the second edge part of the laminated log. Between the first and second lamella there is avertical lamella 14. The material of the surface lamellas and the vertical lamella is massive wood. In the surface lamellas, the direction of the wood grains is substantially parallel to the longitudinal direction of the laminated log. In the vertical lamella, the direction of the wood grains is substantially perpendicular to the plane of the upper surface and lower surface of the laminated log and also perpendicular to the longitudinal direction of the laminated log. The vertical lamella consists of a number of short planks placed adjacent to each other and glued from their edge surfaces to the surface lamellas, i.e. there is a glue joint between the first surface lamella and the vertical lamella and between the second surface lamella and the vertical lamella. The parallel planks of the vertical lamella are attached to each other from their boundary surfaces. There can be a glue joint between the contacting boundary surfaces. The height of the lamellas is equal to the height of the entire log cross-section, i.e. they extend from thelower surface 18 of the log to theupper surface 28 of the log. - By the boundary surface of the
first surface lamella 10 and thevertical lamella 14 of the laminated log of the invention there is aslit 24, which has abottom surface 26. This bottom surface has afirst sealing groove 20 parallel to the slit so that the major part of the sealing groove is located in thevertical lamella 14. A small part of the sealing groove extents over the boundary surface of the lamellas up to the first surface lamella. Respectively, by the boundary surface of thesecond surface lamella 12 and the vertical lamella there is a slit with thesecond sealing groove 22 in the bottom surface. InFigure 1a , the cross-section of the sealing grooves is the shape of a part of an arc of a circle so that when moving from the open edge of the sealing groove towards the bottom of the sealing groove, the width of the sealing groove first grows, after which it starts to reduce. The biggest width of the cross-section of the sealing groove is thus slightly bigger than the width of the open edge of the sealing groove. The sealing groove can also have an equally wide mouth part and a curved bottom part. Aseam seal 21 with a round cross-section is placed into the sealing groove. The seam seal is a band-type part made of elastic, closed-cell material, preferably polyethylene. The seam seal can be closed, or in its middle there can be one or several cavities extending in the longitudinal direction of the seam seal. The diameter of the seam seal is slightly bigger than the biggest diameter of the sealing groove. Preferably, the diameter of the seam seal is 14 mm. The seam seals are attached to the laminated log simply by pressing them in place into the sealing grooves. During the installation, the flexible seam seal compresses slightly so that it fits to travel through the open edge of the sealing groove into the sealing groove. After reaching the inside of the sealing groove, the seam seal tends to resume its original size, i.e. it expands filling substantially the entire sealing groove. Part of the seam seal extends through the open edge outside the sealing groove over the plane of thebottom surface 26 of the slit into theslit 24. The surface of this part of the seam seal extending outside the sealing groove sets against theridge surface 36 of therib 34 in the outer surface of the laminated log lower in the complete log wall. - In the lower surface of the log in
Figure 1a there are twoslits 24, the first one of which is located by the boundary surface of thefirst surface lamella 10 and thevertical lamella 14, and the second one is located by the boundary surface of thesecond surface lamella 12 and the vertical lamella. In a log wall, the laminated logs are piled layer upon layer on top of each other so that the lower surface of the log upper in the wall is set against the upper surface of the log below it so that the ribs of the lower log are settled into the slits of the upper log. The sealing grooves in the bottom surfaces of the slits and the seam seals in them are then set at a distance from each other so that thefirst sealing groove 20 and theseam seal 21 are at the first edge of thevertical lamella 14 and the second sealing groove and the seam seal are at the second edge of the vertical lamella. In the vertical loading of the wall, the compression resistance of the vertical lamellas is bigger and the deformation ability is smaller than in the surface lamellas so that in the complete log wall, the vertical lamellas of the superimposed laminated logs are pressed tightly against each other. The seam seals in the first and second sealing groove seal the seam surface between the vertical lamellas from their both edges. As the ribs press against thebottom surface 26 of the slits, the seam seals 21 contract slightly in the sealinggrooves ridge surface 36 of the rib. The width of the sealing groove is substantially smaller than the width of thebottom surface 26 of the slit and theridge surface 36 of the rib. This ensures that the rib does not have room to press inside the sealing groove, but the ridge surface of the rib sets against the bottom surface of the slit. The seam seal in the sealing groove can thus not flatten too much, but it retains always its elastic deformation ability. - In
Figure 1b there is illustrated in an exemplary manner a cross-sectional view of an advantageous embodiment of the laminated log of the invention. In this embodiment, the laminated log has afirst surface lamella 10, asecond surface lamella 12 and twovertical lamellas 14 between the surface lamellas, with anintermediary lamella 16 between them. The material of all lamellas is massive wood. In thesurface lamellas intermediary lamella 16, the direction of the wood grains is substantially the same as the longitudinal direction of the laminated log. In thevertical lamellas 14, the direction of the wood grains is substantially perpendicular to the plane of the upper surface and lower surface of the laminated log and perpendicular to the longitudinal direction of the laminated log. In this embodiment, thefirst sealing groove 20 is formed at the boundary surface between thefirst surface lamella 10 and the adjacent firstvertical lamella 14, mainly to the firstvertical lamella 14; and thesecond sealing groove 22 is formed at the boundary surface of thesecond surface lamella 12 and the adjacent second vertical lamella, mainly to the second vertical lamella. Seam seals 21 are installed into the sealing grooves. - The laminated log of the invention is manufactured of a laminated log according to the prior art, in which it is possible to distinguish the first and second surface lamella with at least one vertical lamella between them. At least one sealing groove is formed to the lower surface of such a log, at the boundary surface of the vertical lamella and surface lamella by using a suitable wood-working method, such as planning or milling. The seam seal can be installed in place into the sealing groove in any suitable process step following the forming of the sealing groove. It is easiest to install the seam seal in place at the log house factory so that it is no longer necessary to worry about the installation of the seam seal at the erection site of the log building. The seam seal installed in place into the laminated log is protected at the bottom of the slit of the lower surface so that no mechanical stresses are applied to the seam seal during the transportation of the logs, which might harm the seam seal or detach it from the sealing groove. When needed, keeping the seam seal in place in the sealing groove can be ensured by dispensing glue into the sealing groove before installing the seam seal in place so that a glue joint is produced between the seam seal and the surface of the sealing groove. It is not necessary to install the seam seal in place at the log house factory, but the installation can be made also outside the factory area, such as at the erection site of the log building.
- Some advantageous embodiments of a laminated log of the invention have been described above. The invention is not limited to the described solutions, but the inventional idea can be applied in numerous ways within the limits set by the patent claims.
Claims (11)
- Laminated log, which has a first surface lamella (10), a second surface lamella (12) and at least one vertical lamella (14) between the first surface lamella (10) and the second surface lamella (12), in which vertical lamella (14) the direction of the wood grains is substantially perpendicular to the longitudinal direction of the laminated log, and a lower surface (18), in which lower surface there is a first sealing groove (20) for receiving a seam seal (21), wherein said first sealing groove (20) is at the boundary surface of the first surface lamella (10) and the vertical lamella (14), characterized in that a major part of the sealing groove (20, 22) is in the vertical lamella (14).
- Laminated log according to claim 1, characterized in that in the lower surface there is further a second sealing groove (22) for receiving a seam seal (21), the second sealing groove (22) being at least for its major part in the vertical lamella (14), at the boundary surface of the second surface lamella (12) and the vertical lamella (14).
- Laminated log according to claim 1 or 2, characterized in that in the lower surface (18) of the log there are at least two slits (24), which have a bottom surface (26), and the first sealing groove (20) is formed to the bottom surface (26) of the first slit (24) and the second sealing groove (22) is formed to the bottom surface (26) of the second slit (24) as a groove extending from the plane of the bottom surface (26) towards the inner part of the log.
- Laminated log according to claim 3, characterized in that the width of the bottom surface (26) is substantially bigger than the width of the first or second sealing groove (20, 22).
- Laminated log according to any of the claims 1 - 4, characterized in that the cross-sectional form of the first and/or second sealing grooved (20, 22) comprises a part of an arc of a circle.
- Laminated log according to any of the claims 1 - 5, characterized in that at least one sealing groove (20, 22) has a seam seal (21), which is made of an elastic, compressible material, such as polyethylene.
- Laminated log according to claim 6, characterized in that the seam seal (21) has a circular cross-section and that the diameter of the seam seal (21) before contraction is bigger than the biggest width of the sealing groove (20, 22).
- Laminated log according to any of the claims 1 - 7, characterized in that the laminated log has at least two vertical lamellas (14), with an intermediary lamella (16) between them, the direction of wood grains in the intermediary lamella (16) being substantially the same as the longitudinal direction of the laminated log.
- Laminated log according to any of the claims 1 - 8, characterized in that the width of the surface lamella (10, 12) is unequal to the width of the vertical lamella (14).
- Laminated log according to claim 8 or 9, characterized in that the width of the intermediary lamella (16) is unequal to the width of the vertical lamella (14) and/or surface lamella (10, 12).
- Laminated log according to any of the claims 1 - 10, characterized in that the surface lamellas (10, 12) and the vertical lamella/vertical lamellas (14) are massive wood or they are constructed of wooden material parts joined together.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20164205 | 2016-10-13 |
Publications (2)
Publication Number | Publication Date |
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EP3309315A1 EP3309315A1 (en) | 2018-04-18 |
EP3309315B1 true EP3309315B1 (en) | 2022-06-15 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17194729.4A Active EP3309315B1 (en) | 2016-10-13 | 2017-10-04 | Laminated log |
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Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0226567A3 (en) | 1985-12-16 | 1988-07-27 | Wolfgang Pol Joseph Verraes | Built-up wooden sectional beam for the erection of loadbearing walls, and walls erected with such sectional beams |
DE8900698U1 (en) | 1989-01-23 | 1989-04-20 | Schacht, Peter, 8222 Ruhpolding, De | |
DE29923387U1 (en) | 1999-07-26 | 2000-08-24 | Jaspers Helmut | Beam for building a wall of a log house |
DE10153914B4 (en) * | 2001-11-02 | 2005-06-23 | Leibold, Josef | Rectangular building block, masonry blocks and uses of masonry |
FR2976302B1 (en) * | 2011-06-10 | 2015-08-28 | Simonin Sas | WOODEN ELEMENT, WALL TYPE OR FLOOR, AND MORE SPECIFICALLY FIREWALL. |
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2017
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