Wall elements for wooden buildings, a method for manufacture the

Details Wall elements for wooden buildings, a method for manufacture the Wall elements for wooden buildings, a method for manufacture the

1997-01-08

2000-01-04

Kent, Christopher T.

Static structures (e.g., buildings)

Module or panel having discrete edgewise or face-to-face...

52233, 523021, 52539, 525903, E04C 210, E04B 110

Patent

active

060096799

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to wall elements for wooden buildings, with a number of board members of uniform length fastened side by side to transverse lath elements on the inside of the board members in the proximity of the mutually flushing end edges thereof, the opposite side edges of the board members being designed with cooperating engagement members.
Wooden buildings with boarded walls are generally erected in situ by fastening building boards individually to a wooden framework serving as supporting building structure for accommodating static and dynamical loads and transmission thereof to the base of the building.
The boarding forms a socalled weather screen for protection of possible insulation and interior wall behind. On the inside of the boarding, there will normally be arranged a layer of diffusion-open, wind-proof cardboard or paper, and in order to ensure a good ventilation behind the weather screen, the insulation is generally arranged with a clearance in relation to the windproof cardboard or paper.
The cover boards may be fastened either vertically, horizontally or askew. In boarding with horizontal boards, a clinker-structure or special profiled boards may be used. In vertical boarding, the individual boards may be designed for tongue-and-groove engagement or they may be arranged in two layers such that edge zones of a board in one layer is in contact with edge zones of two boards mutually spaced apart in the other layer.
As distinct from this conventional technology it is known eg. from U.S. Pat. No. 4,115,969 to prefabricate larger wall elements of the above-stated type for wooden buildings with the purpose of facilitating the erection of wooden buildings for a number of different purposes and of shortening the time of erection. Such wall elements must therefore be prefabricated with a size and a weight permetting their handling by two men during transport and mounting on the building site.
It is the object of the invention to provide a design of such wall elements enabling joints between the boards to remain essentially stressfree under varying moisture content in the building boards and, at the same time, with the joints designed in such a way that they are always tight independently of air humidity and rain and wind impacts. Thus, the arrangement of a wind-proof backcoating may be dispensed with.
It is a further object of the invention to provide a wall element design permitting the use of pressure-creosoted wooden structures to be avoided thereby taking into account important environmental considerations and, at the same time, reducing the costs.
With this object in view, a wall element according to the invention is characterized in that the engagement elements between two neighboring board members form a labyrinth seal with at least two series connected pressure-reducing chambers for wind load on the exterior of the board member, which labyrinth seal forms against the external side of the member a drainage slit for removal of water collected from the pressure-reducing chamber situated nearest said external side.
Through the design of the wall elements with a view to prefabrication, substantial advantages are obtained, as the method for manufacture may be devised more rationally and under optimal conditions compared to what can be obtained on a building site.
With the design according to the invention of the joints between the building boards, these will thus comprise two series connected relief spaces for wind load on the exterior of the building, draught in the interior of the building being thereby avoided and at the same time, a good ventilation and dust-tight joints being obtained.
The fastening of the board members to the lath elements by means of screw connections which are merely inserted in the backside of the board members, entails that externally accessible screws that may be exposed to the weather can be completely avoided.
In a preferred embodiment, the wall element is at its top and bottom edges designed with cooperating bevel faces for joining overlying wall element

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