EP1444409B1 - Natural tapered house log milling process - Google Patents
Natural tapered house log milling process Download PDFInfo
- Publication number
- EP1444409B1 EP1444409B1 EP01971566A EP01971566A EP1444409B1 EP 1444409 B1 EP1444409 B1 EP 1444409B1 EP 01971566 A EP01971566 A EP 01971566A EP 01971566 A EP01971566 A EP 01971566A EP 1444409 B1 EP1444409 B1 EP 1444409B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- logs
- log
- round
- inches
- curvature
- 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.)
- Expired - Lifetime
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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
Definitions
- This invention pertains to the construction of log walls and utilizes natural tapered whole logs which are fit together and laid horizontally on top of each other.
- this type of wall construction has always been done by hand, using a chainsaw.
- a lateral notch also known as a groove or cope, is cut with a chainsaw from the underside or belly of each log, and runs the full length of each wall log.
- This is an extremely heavy, labour intensive and repetitive task.
- This invention will eliminate the time-consuming hard labour involved, but will still result in the hand-crafted look of tapered log walls.
- the art and craft of building with natural logs continues to gain appeal, and removing this labour intensive aspect of the construction will allow time for log builders to focus more on innovative and creative hand-crafted corner notches and other details unique to their own style of building.
- United States Patent No. 4,312,161 to Goldade teaches the shaping of elongate cylindrical structural members for their interfitting in the construction of walls or similar structures. This provides an example of machine profiled timbers that have been cut from whole logs.
- United States Patent No. 4,510,724 to Magnuson teaches timber construction which incorporates the natural taper of the timbers and uses a uniform notching system for corner joinery. However, this system again relies on each timber being profiled to exact matching dimensions, again generating substantial amounts of wood waste and increased costs.
- hydraulic equipment is being widely used in the wood manufacturing sector to position logs, align them on a determined plane, rotate them and mill them as required. Laser levellers are used in conjunction to ensure accuracy.
- BE-A-548 733 discloses a manual process of shaping whole natural logs using a gauging tool and comprising the steps of selecting logs of similar taper and cutting a concave groove in the upper surface of the log to form a lengthwise lateral notch in the upper surface, the concave groove having a predetermined curvature in accordance with a diameter range of the logs.
- CA-A-918 882 discloses a process for milling whole natural logs in which an upper convex surface and a parallel lower concave surface are machined into the logs, the remaining surface remaining non-machined.
- This invention embodied in a process for milling whole natural logs for log wall construction according to claim 1 and a method for building a log wall construction using such logs according to claim 7 allows for the full utilization of each naturally tapered log used in wall construction. Essentially, only the bark and a very small portion of log are unused, and the bark can be sold as landscape mulch.
- This process utilizes a machine to create the lateral notch, also known as a groove or cope, on the underside of a house building log and to mill a matching convex surface on the top of each log, creating walls that maintain the natural taper of each whole log used (refer to FIG. 1).
- the convex curvature of the top of each log will be milled to match the concave curvature on the bottom of the log sitting directly above it, using a common curvature 13 for specified diameters.
- a 16 inch diameter curvature is defined as being equal to any portion of the perimeter of a 16 inch circle.
- a 10 inch diameter curvature equals any portion of the perimeter of a 10 inch circle; refer to FIG.3 13.
- the key factor in this process is to use logs of similar taper and mill them to exactly the same degree of taper. This is accomplished by positioning the log that is to be milled so that the top surface is on a horizontal plane. The concave groove is then cut into that surface. The log is then mechanically rotated 180 degrees so the opposite surface of the log is on top. Once again, hydraulic lifters and laser levellers position the log so that the top surface is essentially on a horizontal plane, with the log held in position so that the planing process results in creating the identical degree of taper in every log. A matching convex curvature is then milled on this surface.
- level wall height is achieved every 2 rounds* (refer to FIG.1); this is contingent upon logs being stacked so that, at each end of the wall being built, a butt 11 (or largest diameter of a log) alternates with a tip 12 (or smallest diameter of a log); refer to FIG. 1.
- Trees grown in the same area have similar taper. Ideal house logs have 1 inch of taper in every 10 feet of length. If the taper is greater than that, the machine can still be used with the same results. Cutting blades with different curvatures would be used for different diameters of logs, however, with this concept, the same curvature blade and the same degree of taper in the logs used must be maintained for any one complete building. Logs ranging from 5 to 10 inches in diameter would use a 10" curvature blade. Logs ranging from 10 to 16 inches in diameter would use a 16 inch curvature blade. Logs ranging form 16 to 24 inches would use a 24 inch curvature blade.
- a natural tapered house log milling machine would be designed so that the machine head would move down the length of the log, as opposed to the equipment being stationary and the log being turned and moved. This would enable logs of up to 55 feet in length to be milled.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Load-Bearing And Curtain Walls (AREA)
- Artificial Fish Reefs (AREA)
Abstract
Description
Number of logs required to gain 120 inches (or 10 ft) in wall height: | ||
6" double tongue and groove | 20 logs high | maximum obtainable length is 24 feet |
8" double tongue and |
15 logs high | maximum obtainable length is 24 feet |
10" |
12 logs high | 13" average diameter logs must be used and 30-40% of the wood becomes waste; maximum obtainable length is 28 ft. |
10" tip, 16" butt trees (natural tapered logs) -13" average diameter | 9.2 logs high | full length trees can be used (up to 55 ft.long) resulting in maximum height gain per round |
Claims (7)
- A process for milling whole natural logs for log wall construction, the process comprising steps of:(i) selecting logs of similar taper;(ii) positioning one of the selected logs for a first phase of milling such that a top surface thereof is in a horizontal plane;(iii) in the first phase of milling, cutting a concave groove in the upper surface of the log to form a lengthwise lateral notch in the upper surface, the concave groove having a predetermined curvature in accordance with a diameter range of the logs;(iv) mechanically rotating the log through 180° to expose an opposite surface;(v) positioning the opposite surface in an essentially horizontal plane;(vi) in a planing process, planing the opposite surface to provide a taper identical to a taper of the top surface;(vii) in a second phase of milling, milling a convex curvature on the opposite surface matching the predetermined curvature; and(viii) repeating steps (ii) to (vii) for each of the selected logs.
- The process of claim 1, wherein the selected logs have a maximum butt diameter approximately 15 cm (6 inches) greater than the minimum tip diameter.
- The process of claim 2, wherein for selected logs the predetermined curvature is approximately equal to the maximum butt diameter.
- The process of claim of claim 1, wherein the predetermined curvature is about 25 cm (10 inches) when the diameter range of the logs is about 13 - 25 cm (5 - 10 inches).
- The process of claim of claim 1, wherein the predetermined curvature is about 41 cm (16 inches) when the diameter range of the logs is about 25 - 41 cm (10 - 16 inches).
- The process of claim of claim 1, wherein the predetermined curvature is about 61 cm (24 inches) when the diameter range of the logs is about 41 - 61 cm (16 - 24 inches).
- A method for building a log wall construction, using logs milled according to the process of any one of claims 1 to 6, comprising:(a) laying a first round of logs such that a butt end of each log abuts a tip end of an adjacent log, and the convex curvature of the opposite surface of each log forms a top of the first round;(b) stacking a second round of logs on the first round such that each butt end of the second round of logs alternates with a tip end of the first round, and the concave grooves of the logs of the second round face downwards and coincide with the convex curvatures of the first round; and(c) repeating steps (a) and (b) to form the log wall construction such that every second round provides a level wall height.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05102362A EP1566500A1 (en) | 2001-09-13 | 2001-09-13 | Natural tapered house log milling process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CA2001/001314 WO2003023158A1 (en) | 2001-09-13 | 2001-09-13 | Natural tapered house log milling process |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05102362A Division EP1566500A1 (en) | 2001-09-13 | 2001-09-13 | Natural tapered house log milling process |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1444409A1 EP1444409A1 (en) | 2004-08-11 |
EP1444409B1 true EP1444409B1 (en) | 2005-06-15 |
Family
ID=4143163
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01971566A Expired - Lifetime EP1444409B1 (en) | 2001-09-13 | 2001-09-13 | Natural tapered house log milling process |
EP05102362A Withdrawn EP1566500A1 (en) | 2001-09-13 | 2001-09-13 | Natural tapered house log milling process |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05102362A Withdrawn EP1566500A1 (en) | 2001-09-13 | 2001-09-13 | Natural tapered house log milling process |
Country Status (7)
Country | Link |
---|---|
US (1) | US20040237457A1 (en) |
EP (2) | EP1444409B1 (en) |
JP (1) | JP2005501990A (en) |
AT (1) | ATE298021T1 (en) |
CA (1) | CA2459444C (en) |
DE (1) | DE60111579T2 (en) |
WO (1) | WO2003023158A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2472614C2 (en) * | 2010-12-14 | 2013-01-20 | Валерий Петрович Чулков | Making log house using log machining |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE548733A (en) * | ||||
US2525659A (en) * | 1948-10-12 | 1950-10-10 | Building Logs Inc | Building log |
CA918882A (en) * | 1970-02-24 | 1973-01-16 | Maskuta Properties Ltd. | Log of natural taper for prefabricated structures |
US3863409A (en) * | 1972-12-11 | 1975-02-04 | Charles Raymond Fell | Log cabin structure |
US3951187A (en) * | 1975-04-24 | 1976-04-20 | Finis Lavell Chisum | Machine to prepare logs for log houses |
US4067368A (en) * | 1976-04-20 | 1978-01-10 | Beecroft William K | Cabin log shaper |
US4147000A (en) * | 1977-10-31 | 1979-04-03 | Lewandowski Robert E | Insulated log building structure |
JPS5496214A (en) * | 1978-01-14 | 1979-07-30 | Kaneto Saito Mokuzai Kk | Method of building house of logs |
US4167961A (en) * | 1978-04-13 | 1979-09-18 | New England Log Homes, Inc. | Planer and groover |
CA1096130A (en) | 1979-02-28 | 1981-02-24 | Sebastian M. Goldade | Log-joint system |
US4510724A (en) | 1981-10-13 | 1985-04-16 | Karl Magnuson | Building structure |
JPS611748A (en) * | 1984-06-12 | 1986-01-07 | 秋田 恭志 | Constitution of building by connecting log materials |
US4903447A (en) | 1988-05-16 | 1990-02-27 | Mcdade Paul R | Log profile and log structure incorporating said log profile |
US4951435A (en) * | 1989-01-17 | 1990-08-28 | Lloyd Beckedorf | Log building construction |
JPH05141022A (en) * | 1991-11-21 | 1993-06-08 | Yoshinori Okura | Construction for wall body for structure |
US5718091A (en) * | 1996-03-25 | 1998-02-17 | Sellers; Jonathan S. | Construction of a log cabin |
US6023895A (en) * | 1997-06-24 | 2000-02-15 | Anderson; Theodore W. | Log interface and log walls and buildings constructed therefrom |
US5878800A (en) * | 1998-01-23 | 1999-03-09 | Young; Ralph C. | Rectangular opening box cutting apparatus |
US6070376A (en) * | 1998-09-03 | 2000-06-06 | Asper; William D. | Interfitting wooden and log walls |
US6412241B1 (en) * | 2000-03-02 | 2002-07-02 | Robert W. Chambers | Accelerated log building method |
US6564526B2 (en) * | 2000-03-02 | 2003-05-20 | Accelerated Log Building, Inc. | Accelerated log building method |
-
2001
- 2001-09-13 WO PCT/CA2001/001314 patent/WO2003023158A1/en active IP Right Grant
- 2001-09-13 JP JP2003527209A patent/JP2005501990A/en active Pending
- 2001-09-13 DE DE60111579T patent/DE60111579T2/en not_active Expired - Fee Related
- 2001-09-13 AT AT01971566T patent/ATE298021T1/en not_active IP Right Cessation
- 2001-09-13 CA CA002459444A patent/CA2459444C/en not_active Expired - Fee Related
- 2001-09-13 US US10/488,873 patent/US20040237457A1/en not_active Abandoned
- 2001-09-13 EP EP01971566A patent/EP1444409B1/en not_active Expired - Lifetime
- 2001-09-13 EP EP05102362A patent/EP1566500A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2472614C2 (en) * | 2010-12-14 | 2013-01-20 | Валерий Петрович Чулков | Making log house using log machining |
Also Published As
Publication number | Publication date |
---|---|
US20040237457A1 (en) | 2004-12-02 |
JP2005501990A (en) | 2005-01-20 |
DE60111579D1 (en) | 2005-07-21 |
EP1444409A1 (en) | 2004-08-11 |
CA2459444A1 (en) | 2003-03-20 |
EP1566500A1 (en) | 2005-08-24 |
WO2003023158A1 (en) | 2003-03-20 |
CA2459444C (en) | 2007-01-23 |
DE60111579T2 (en) | 2006-05-04 |
ATE298021T1 (en) | 2005-07-15 |
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