WO2014081307A1 - Building log for double log wall - Google Patents

Building log for double log wall Download PDF

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Publication number
WO2014081307A1
WO2014081307A1 PCT/NO2013/050194 NO2013050194W WO2014081307A1 WO 2014081307 A1 WO2014081307 A1 WO 2014081307A1 NO 2013050194 W NO2013050194 W NO 2013050194W WO 2014081307 A1 WO2014081307 A1 WO 2014081307A1
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WO
WIPO (PCT)
Prior art keywords
log
building
internal
external
logs
Prior art date
Application number
PCT/NO2013/050194
Other languages
French (fr)
Inventor
Torleif Kristoffer SKARRA
Original Assignee
Skarra Torleif Kristoffer
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Skarra Torleif Kristoffer filed Critical Skarra Torleif Kristoffer
Publication of WO2014081307A1 publication Critical patent/WO2014081307A1/en

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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
    • 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

  • Log buildings have several important qualities. They are durable with a very long life, can easily be disassembled and moved. Log buildings built correctly are beautiful and functional, using few synthetic materials that may give allergy and over-sensitivity complaints. The production of log buildings and the recirculation of discarded log buildings contribute very little to greenhouse gases and global warming.
  • log walls have a poor insulating capacity.
  • an external log wall consists of one stack of logs, wherein the wall thickness is identical to the log thickness.
  • Woodwork has a considerably poorer insulating capacity than modern insulation materials.
  • a framework wall with 200 mm of insulation, insulated uprights and a wind barrier has a U-value of 0.18 W/(m 2 Kelvin), whereas a notch-joint log wall 195 mm thick has a U-value of 0.60 W/(m 2 Kelvin) or more.
  • conventional log walls do not have the possibility of satisfying the insulation requirements for modern building walls.
  • Another method described is to cut/mill out parts of the woodwork of the log and possibly replace it with other insulating material; NO173068, US4344263.
  • P26914PC00DE ements are well suited for use on the outside of a frame-house structure instead of the usual external panelling.
  • the patent/publication document NO 141956 B discloses planks/beams that are planed round on one side, so that they get a surface resembling the sides of a building log, and that are mounted opposite each other two and two with the rounded sides out and fixed to a log piece at either end.
  • the patent GB 2471696 A discloses a set of outer building logs and a set of inner building logs in which the outer building logs are used for outer log walls and the inner building logs are used for inner log walls and the space between the outer and inner log walls may be used for positioning insulation.
  • the patent SE 443599 B discloses building logs for double log walls, the building logs being split by longitudinal vertical cuts so that the internal parts of the building logs are free from the external parts of the building logs, the splitting starting in the middle of the corner-joint necks. External log parts are used for building external log walls and internal log parts are used for building internal log walls.
  • Figure 1 shows an original building log prior to splitting, viewed from above, with marks for corner-joint necks and for outer terminations of corner-joint heads and excess pieces outside these;
  • Figure 2 shows an original building log, viewed from above, with the positioning of a vertical longitudinal cut that meets vertical oblique cuts for splitting into external and internal building logs;
  • Figure 3 shows an extra wide original building log with the positioning of two vertical longitudinal cuts exiting the log in curves on the internal side to split the log into three parts, an external building log, an internal building log and a central piece between them;
  • Figure 4 shows external and internal building logs after splitting, viewed from
  • Figure 5 shows external and internal half-logs, the internal half-log consisting of a central piece and two end pieces whose sizes and shapes are determined by vertical, straight, oblique cuts;
  • P26914PC00DE Figure 6 shows an external building log consisting of an external half-log with attached end pieces and an internal building log consisting of the central piece;
  • Figure 7 shows external and internal building logs in a side view with a gradually reduced height in the longitudinal direction and with corner-joint necks and corner-joint heads;
  • Figure 8a shows a cross-section of an original building log intended for machine- jointing with grooves and tongues and the positioning of a cut for splitting into external and internal building logs
  • Figure 8b shows cross sections of external and internal building logs in hand- jointing, with roundings on the top sides of the logs and grooves on the bottom sides;
  • Figure 8c shows cross sections of external and internal building logs in hand-jointing and the fitting of dowels
  • Figure 9 shows external and internal log walls viewed from above, with wall- spacing and wall-bracing uprights and intermediate insulation, a vapour barrier and a wind barrier;
  • Figure 10 shows a log wall in an external side view with building logs with gradual height reduction in the longitudinal direction.
  • a wide building log 1 is split by a longitudinal vertical cut 4 parallel to the longitudinal axis of the log into an external part, called an external building log 2, and an internal piece, called an internal building log 3.
  • the logs may be split by two cuts 5, 6 into three parts, external and internal building logs and a central piece 10 which is not used when building with the logs.
  • the cut or cuts enters) and exit(s) the log in a curve 7 or a slope 9 on the inside of the log near the innermost boundaries of the corner-joint necks 8.
  • the internal side of the external building log may be given extra hold just inside the corner-joint necks, for example with long screws 11 to reduce checking.
  • an external half-log 37 and an internal half-log 38 each one having half the width of the wide
  • the internal half-log consists of a central piece 39 and two end pieces 40, and the sizes and shapes of the central piece and the end pieces are determined by a vertical, oblique cut 41 or a curved cut 42 starting on the internal side just within the innermost mark 43 of the corner-joint necks.
  • the central piece corresponds to the internal building log 3 described above and is used as this in the further building process.
  • the end pieces are glued or fixed in some other way to the ends of the external half-log so that together they correspond to the external building log 2 and are used as this in the further building process.
  • An original building log as well as half-logs, central pieces and end pieces may be made from one log or from laminated wood.
  • the surface of the building log should be worked before splitting.
  • the log is given the desired shape 19 including a fixing system, for example by the use of a groove and tongue.
  • the log may be provided with at least one groove towards each outer edge of the bottom side 20 of the log.
  • at least one tongue 21 may be made, so that after splitting, tongues on the external and internal building logs fit into grooves on the external and internal logs lying on top, giving stability to the log wall.
  • Other fixing methods may also be necessary, for example the use of dowels 31.
  • half-logs, central pieces and end pieces are given the desired surfaces including fixing systems, possibly after the end pieces have been fixed to the ends of the external half-log.
  • External logs are used for building external log walls 12, whereas internal logs are used for building internal log walls 13.
  • An outer wall in the log building will thus consist of two log walls, an external log wall and an internal log wall, both walls having full, solid corner joints; the external wall in the original width of the full building log.
  • the space between the external and internal log walls is used for insulation 14 and possibly a vapour barrier 15 and a wind barrier 16.
  • the distance 17 between the external and internal log walls is determined by the thickness of the insulation and the vapour and wind barriers.
  • vertical wall-spacing and wall-bracing uprights 32 may be used, to which the external and internal logs are fixed. These uprights must be of such a nature that they give little heat conduction from the internal log wall to the external log wall. The points of attachment of the logs to the uprights must have the possibility of sufficient vertical movement because of the future settling of the log wall. It may be necessary to have several successive uprights in the height, with overlapping in the longitudinal direction of the uprights to give good support to the wall.
  • Other material may be used between the log walls, for example a fire-stopping or sound-stopping material.
  • the method makes it possible to insulate log walls with an insulation thickness of one's choice so that the walls may satisfy the most stringent requirements for insulating capacity.
  • Dividing the building logs will give considerably fewer and smaller check formations in the logs than building with full, non-split logs.
  • the building method does not require increased consumption of timber or wood in relation to conventional building with logs, with the exception of increased material consumption because of the increased total area in consequence of the increased wall thickness, materials for wider linings in windows and doors and materials for spacing and wall-bracing uprights.
  • the method can be used in both machine-jointing and conventional hand- jointing.
  • the method can also be used for other purposes, for example the construction of a fire-stopping or sound-stopping wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Load-Bearing And Curtain Walls (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Finger-Pressure Massage (AREA)
  • Building Environments (AREA)

Abstract

A building log (1) of a sufficient width is split into an external building log (2) and an internal building log (3) and possibly a central piece (10) by one (4) or two (5, 6) longitudinal vertical cuts. The cut enters and exits the log in a slope or curve on the internal side of the log, beside inner marks for the corner-joint necks (8). Alternatively, two half-logs (37, 38) of half the width of the above-mentioned building log may be used, the internal half-log consisting of a central piece (39) and two end pieces (40), the sizes and shapes of which are determined by oblique (41) or curved (42) cuts that cut in from the internal side beside the inner marks for the corner-joint necks (43). The external building log or the external half-log with end pieces fixed to it is used for building an external log wall (12), whereas the internal building log or the central piece is used for building an internal log wall (13). The external log wall has full, solid corner joints in the full width of the original building log, whereas the internal log wall has solid corner joints in half its width. The space between the external and internal log walls is used for insulation (14) and possibly a vapour barrier (15) and a wind barrier (16). Building logs, half-logs, central pieces and end pieces are given the desired appearances including fixing systems. The logs are provided with the necessary jointing notches, and the corner-joint heads are cut (23, 28) at their ends. Machine-jointed logs or conventionally hand-jointed material may be used. The space between the external and internal log walls may also be used for other materials, for example fire- or sound-stopping materials.

Description

BUILDING LOG FOR DOUBLE LOG WALL Advantages and disadvantages of log buildings
Log buildings have several important qualities. They are durable with a very long life, can easily be disassembled and moved. Log buildings built correctly are beautiful and functional, using few synthetic materials that may give allergy and over-sensitivity complaints. The production of log buildings and the recirculation of discarded log buildings contribute very little to greenhouse gases and global warming.
However, log walls have a poor insulating capacity. Conventionally, an external log wall consists of one stack of logs, wherein the wall thickness is identical to the log thickness. Woodwork has a considerably poorer insulating capacity than modern insulation materials. A framework wall with 200 mm of insulation, insulated uprights and a wind barrier has a U-value of 0.18 W/(m2Kelvin), whereas a notch-joint log wall 195 mm thick has a U-value of 0.60 W/(m2Kelvin) or more. Thus, conventional log walls do not have the possibility of satisfying the insulation requirements for modern building walls.
Earlier patents
Against this background, many solutions have appeared with the aim of combining log construction with an improved insulating capacity. Several patents have for their object to produce a "building log" in which the surface visible in the log wall is made of wood, whereas the remaining part of the "building log" may consist of other materials with insulating properties, possibly combined with wood; NO328330, N0318394, N0311583, N0318375, NO179083, NO904871, N0894851, NO840148 among others.
Another method described is to cut/mill out parts of the woodwork of the log and possibly replace it with other insulating material; NO173068, US4344263.
A method in which half the thickness of the building log is milled out internally from halfway inside one corner joint to halfway inside the other corner joint has been described as well; NO801861. It has been stated that the described log-construction el-
P26914PC00DE ements are well suited for use on the outside of a frame-house structure instead of the usual external panelling.
The patent/publication document NO 141956 B discloses planks/beams that are planed round on one side, so that they get a surface resembling the sides of a building log, and that are mounted opposite each other two and two with the rounded sides out and fixed to a log piece at either end.
The patent GB 2471696 A discloses a set of outer building logs and a set of inner building logs in which the outer building logs are used for outer log walls and the inner building logs are used for inner log walls and the space between the outer and inner log walls may be used for positioning insulation.
The patent SE 443599 B discloses building logs for double log walls, the building logs being split by longitudinal vertical cuts so that the internal parts of the building logs are free from the external parts of the building logs, the splitting starting in the middle of the corner-joint necks. External log parts are used for building external log walls and internal log parts are used for building internal log walls.
Summary of the figures
Figure 1 shows an original building log prior to splitting, viewed from above, with marks for corner-joint necks and for outer terminations of corner-joint heads and excess pieces outside these;
Figure 2 shows an original building log, viewed from above, with the positioning of a vertical longitudinal cut that meets vertical oblique cuts for splitting into external and internal building logs;
Figure 3 shows an extra wide original building log with the positioning of two vertical longitudinal cuts exiting the log in curves on the internal side to split the log into three parts, an external building log, an internal building log and a central piece between them;
Figure 4 shows external and internal building logs after splitting, viewed from
above, with marks for corner-joint necks and outer boundaries of corner- joint heads;
Figure 5 shows external and internal half-logs, the internal half-log consisting of a central piece and two end pieces whose sizes and shapes are determined by vertical, straight, oblique cuts;
P26914PC00DE Figure 6 shows an external building log consisting of an external half-log with attached end pieces and an internal building log consisting of the central piece;
Figure 7 shows external and internal building logs in a side view with a gradually reduced height in the longitudinal direction and with corner-joint necks and corner-joint heads;
Figure 8a shows a cross-section of an original building log intended for machine- jointing with grooves and tongues and the positioning of a cut for splitting into external and internal building logs;
Figure 8b shows cross sections of external and internal building logs in hand- jointing, with roundings on the top sides of the logs and grooves on the bottom sides;
Figure 8c shows cross sections of external and internal building logs in hand-jointing and the fitting of dowels;
Figure 9 shows external and internal log walls viewed from above, with wall- spacing and wall-bracing uprights and intermediate insulation, a vapour barrier and a wind barrier; and
Figure 10 shows a log wall in an external side view with building logs with gradual height reduction in the longitudinal direction.
The invention
A wide building log 1 is split by a longitudinal vertical cut 4 parallel to the longitudinal axis of the log into an external part, called an external building log 2, and an internal piece, called an internal building log 3. By particularly wide building logs, the logs may be split by two cuts 5, 6 into three parts, external and internal building logs and a central piece 10 which is not used when building with the logs. The cut or cuts enters) and exit(s) the log in a curve 7 or a slope 9 on the inside of the log near the innermost boundaries of the corner-joint necks 8.
The internal side of the external building log may be given extra hold just inside the corner-joint necks, for example with long screws 11 to reduce checking.
Instead of said original building log, two narrower logs may be used, termed an external half-log 37 and an internal half-log 38, each one having half the width of the wide
P26914PC00DE building log mentioned above.
The internal half-log consists of a central piece 39 and two end pieces 40, and the sizes and shapes of the central piece and the end pieces are determined by a vertical, oblique cut 41 or a curved cut 42 starting on the internal side just within the innermost mark 43 of the corner-joint necks. The central piece corresponds to the internal building log 3 described above and is used as this in the further building process. The end pieces are glued or fixed in some other way to the ends of the external half-log so that together they correspond to the external building log 2 and are used as this in the further building process.
An original building log as well as half-logs, central pieces and end pieces may be made from one log or from laminated wood.
In machine-jointing, the surface of the building log should be worked before splitting. The log is given the desired shape 19 including a fixing system, for example by the use of a groove and tongue. The log may be provided with at least one groove towards each outer edge of the bottom side 20 of the log. Correspondingly, towards each outer edge of the top side of the log, at least one tongue 21 may be made, so that after splitting, tongues on the external and internal building logs fit into grooves on the external and internal logs lying on top, giving stability to the log wall. Other fixing methods may also be necessary, for example the use of dowels 31.
Correspondingly, half-logs, central pieces and end pieces are given the desired surfaces including fixing systems, possibly after the end pieces have been fixed to the ends of the external half-log.
External and internal building logs are provided with corner-joint necks 8, 22, 24, 25, 27, 43, 44 and other jointing notches necessary, and the log heads have their ends cut 23, 26, 28, 45.
External logs are used for building external log walls 12, whereas internal logs are used for building internal log walls 13. An outer wall in the log building will thus consist of two log walls, an external log wall and an internal log wall, both walls having full, solid corner joints; the external wall in the original width of the full building log.
The space between the external and internal log walls is used for insulation 14 and possibly a vapour barrier 15 and a wind barrier 16. The distance 17 between the external and internal log walls is determined by the thickness of the insulation and the vapour and wind barriers.
P26914PC00DE Conventional building with logs requires the top sides 29 of the external and internal building logs to be rounded, and grooves to be provided on the bottom sides 30 so that the grooves of logs lying on top may be pressed down against the roundings of underlying logs.
In both machine-jointing and hand-jointing, between the external and internal log walls, vertical wall-spacing and wall-bracing uprights 32 may be used, to which the external and internal logs are fixed. These uprights must be of such a nature that they give little heat conduction from the internal log wall to the external log wall. The points of attachment of the logs to the uprights must have the possibility of sufficient vertical movement because of the future settling of the log wall. It may be necessary to have several successive uprights in the height, with overlapping in the longitudinal direction of the uprights to give good support to the wall.
When using building logs of varying log heights 33 and/or gradually decreasing heights in the logs in the longitudinal direction 34, external and internal logs having the same log height and the same gradual height reduction should be used in pairs at the same wall height in external and internal log walls.
When building with the logs, the logs of the external and internal walls must be fixed to the spacing/bracing uprights. The possible vapour barrier and wind barrier must be in place, and insulation may be placed or filled in later. Pipes, wire conduits and other equipment between external and internal walls should also be installed when building.
Other material may be used between the log walls, for example a fire-stopping or sound-stopping material.
Advantages of the building method
Advantages of the building method described are, among others, the following :
I. The method makes it possible to insulate log walls with an insulation thickness of one's choice so that the walls may satisfy the most stringent requirements for insulating capacity.
II. By the use of full logs that are split, the log walls will have the appearance and qualities of conventional log walls, seen both from the outside and from the inside. (When half-logs, or laminated logs and log parts, are used, the joints will be visible, especially in the corner-joint heads.)
III. The method gives wider, solid corner joints in the external wall of the log wall,
P26914PC00DE with optimum stability and sealing in the wall corners.
IV. Dividing the building logs will give considerably fewer and smaller check formations in the logs than building with full, non-split logs.
V. The building method does not require increased consumption of timber or wood in relation to conventional building with logs, with the exception of increased material consumption because of the increased total area in consequence of the increased wall thickness, materials for wider linings in windows and doors and materials for spacing and wall-bracing uprights.
VI. The method gives only a moderate cost increase in relation to conventional building with logs without insulation.
VII. The method can be used in both machine-jointing and conventional hand- jointing.
VIII. The method can also be used for other purposes, for example the construction of a fire-stopping or sound-stopping wall.
P26914PC00DE

Claims

C l a i m s
1. A building log for a double log wall, wherein an original building log (1) is split into an internal part called an internal building log (3), a possible central piece (10) and an external part called an external building log (2) by at least one longitudinal vertical cut (4; 5, 6),
or wherein the original building log consists of two equally long half-logs (37, 38), being an internal part thereof called an internal half-log (38), and an external part thereof called an external half-log (37), c h a r a c t e r i z e d i n that the longitudinal vertical cuts (4; 5, 6) in the original building log (1) have been carried in curved or oblique vertical cuts (7, 9) into and out of the log (1) on the inside beside an inner mark for each corner-joint neck (8) for the formation of the internal building log (3) and the external building log (2), the internal building log (3) being for building internal log walls (13) whereas the external building log (2) is for building external log walls (12),
or that the internal half-log (38) consists of a central piece (39) and two end pieces (40), the sizes and shapes of the central piece (39) and the end pieces (40) being determined by an oblique or curved cut (41, 42) beside the i nner mark for each corner-joint neck (43), and the central piece (39) being for building internal log walls (13), whereas the external half-log (37) with end pieces (40) fixed to it is for building external log walls (12).
2. The building log for a double log wall in accordance with claim 1, wherein the original building log, half-log, central piece and end piece may be made from one log or from laminated wood.
3. The building log for a double log wall in accordance with claims 1-2, wherein the building logs before splitting, half-logs, central pieces and end pieces have been given desired surfaces (19) including a fixing system, for example by the use of grooves (20) and tongues (21) with at least one groove towards each outer edge on the bottom side of the logs and at least one tongue towards each outer edge on the top sides of the logs, so that the tongues on the external and internal building logs fit into grooves in the building logs lying on top.
4. The building log for a double log wall in accordance with claims 1-3, wherein the building logs are provided with corner-joint necks and possibly holes for dowels (31), and the corner-joint heads have had their ends cut.
5. The building log for a double log wall in accordance with claims 1-4, wherein the space between the external and internal log walls is dedicated to insulation (14) and possibly a vapour barrier (15) and a wind barrier (16), and wherein the distance (17) between the external and internal log walls corresponds to the insulation thickness and the thickness of the vapour barrier and wind barrier.
6. The building log for a double log wall in accordance with claims 1-5, wherein, in conventional hand-jointing, the external and internal building logs are rounded on the top sides (29) and have grooves (30) on the bottom sides.
7. The building log for a double log wall in accordance with claims 1-6, wherein vertical, spacing and wall-bracing uprights (32) are installed between the external and internal log walls, the external and internal logs being fixed to the uprights, and the points of attachment of the logs having a possibility of vertical movement on the uprights.
8. The building log for a double log wall in accordance with claims 1-7, wherein the cavity between the external and internal log walls contains some other material, for example a fire- or sound-stopping material.
P26914PC00DE
PCT/NO2013/050194 2012-11-23 2013-11-13 Building log for double log wall WO2014081307A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20121410A NO334181B1 (en) 2012-11-23 2012-11-23 Double ceiling wall canopy
NO20121410 2012-11-23

Publications (1)

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WO2014081307A1 true WO2014081307A1 (en) 2014-05-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU182399U1 (en) * 2018-06-05 2018-08-16 Федеральное государственное бюджетное образовательное учреждение высшего образования "Томский государственный архитектурно-строительный университет" (ТГАСУ) WALL OF BUILDING FROM BRUS

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2802275A1 (en) * 1977-01-20 1978-07-27 Toeraasen Magne Assembled wooden beam building element - has solid end spacers and cross connectors joined paired parallel side planks for log cabin structure (NL 24.7.78)
US4330973A (en) * 1979-08-24 1982-05-25 Marklund Karl Gerhard Unit preferably of wood
US20080083177A1 (en) * 2005-07-20 2008-04-10 Sylvain Tiberi Stackable insulated unit for wall construction and method of fabrication thereof
GB2471696A (en) * 2009-07-09 2011-01-12 Alexander Murphy Log cabin wall
US20120031025A1 (en) * 2011-08-11 2012-02-09 Jesse Barton Cox Insulated natural log cabin

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2802275A1 (en) * 1977-01-20 1978-07-27 Toeraasen Magne Assembled wooden beam building element - has solid end spacers and cross connectors joined paired parallel side planks for log cabin structure (NL 24.7.78)
US4330973A (en) * 1979-08-24 1982-05-25 Marklund Karl Gerhard Unit preferably of wood
US20080083177A1 (en) * 2005-07-20 2008-04-10 Sylvain Tiberi Stackable insulated unit for wall construction and method of fabrication thereof
GB2471696A (en) * 2009-07-09 2011-01-12 Alexander Murphy Log cabin wall
US20120031025A1 (en) * 2011-08-11 2012-02-09 Jesse Barton Cox Insulated natural log cabin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU182399U1 (en) * 2018-06-05 2018-08-16 Федеральное государственное бюджетное образовательное учреждение высшего образования "Томский государственный архитектурно-строительный университет" (ТГАСУ) WALL OF BUILDING FROM BRUS

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NO334181B1 (en) 2014-01-13

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