Static structures (e.g. – buildings) – Composite prefabricated panel including adjunctive means – Sandwich or hollow with sheet-like facing members
Reexamination Certificate
2000-04-06
2001-06-12
Safavi, Michael (Department: 3635)
Static structures (e.g., buildings)
Composite prefabricated panel including adjunctive means
Sandwich or hollow with sheet-like facing members
C052S654100, C052S656100
Reexamination Certificate
active
06244016
ABSTRACT:
The invention relates to a prefabricated wall panel comprising a frame which is provided with a lining on one or both sides.
BACKGROUND OF THE INVENTION
This prefabricated wall panel is known from DE 25 19 469 B. Known prefabricated wall panels, especially those for prefabricated construction, have a frame which is composed of beams, the beams often being joined to one another by means of nail plates to form the frame of the prefabricated wall panel. To save material and weight, in known prefabricated wall panels the frames are produced from beams with a rectangular cross sectional shape, the beams generally being aligned such that the wider side surfaces of the beams are aligned perpendicular to the plane of the prefabricated wall panel. Thus, between the linings of the prefabricated wall panel which are attached to the frame, space is created for the installation of relatively thick insulation. There is however little space available for attachment of nail plates to the narrow side of the beams so that only narrow nail plates can be used. This imparts only little stiffness to the frames of known prefabricated wall panels. Therefore in the known prefabricated wall panels the internal and external lining must contribute to the strength of the prefabricated wall panel.
The disadvantage in the known prefabricated wall panels is therefore that for high transverse loading, for example due to strong wind impact, damage to the prefabricated wall panel (cracking, warping), especially of the linings of the prefabricated wall panel, can arise when the linings of the prefabricated wall panel are not very sturdy, therefore for example, when they are not made with the corresponding wall thickness.
SUMMARY OF THE INVENTION
The object of the invention is to devise remedies here and to make available a prefabricated wall panel of the initially mentioned type in which the frame of the prefabricated wall panel is made stiffer than in known prefabricated wall panels, and in addition there is the possibility of matching the thickness of the prefabricated wall panel to the insulating properties of the prefabricated wall panel which are desired at the time.
This object is achieved as claimed in the invention with a prefabricated wall panel with the features of claim
1
.
Preferred and advantageous embodiments of the prefabricated wall panel as claimed in the invention are the subject of the dependent claims.
The prefabricated wall panel as claimed in the invention has a frame which consists of boards. Preferably the frame consists of two frame parts which are aligned at least roughly parallel to one another. These frame parts form for example an inner and an outer frame. The frame parts are interconnected for example via transverse spacing boards. This yields a stiff frame for the prefabricated wall panel as claimed in the invention.
Furthermore, the invention makes it possible to choose the width of the boards which form the frame parts such that there is enough room for connecting elements, for example, nail plates, at the connection locations of the boards which form the frame parts.
The width of the transverse boards which connect the frame parts, for example the inner frame with the outer frame, can be chosen according to the desired insulation action of the prefabricated wall panel so that with the same frame parts (inner frame and outer frame) prefabricated wall panels with different wall thicknesses and accordingly with different thickness of the space which holds the insulation can be built.
It is advantageous in the prefabricated wall panel as claimed in the invention that material and weight are saved, since the boards which form the frame parts need be only roughly 30 to 50 mm thick. Also the transverse boards which join the frame parts to one another generally need not be thicker than 40 to 60 mm.
Another advantage of the prefabricated wall panel as claimed in the invention consists in that the boards which form the frame parts can be joined to one another by large-area nail plates. Thus there arises sufficient stiffness of the two frame parts and the lining of the prefabricated wall panel is no longer decisive for the strength of the prefabricated wall panel.
It is also advantageous that the boards which are joined to one another to form frame parts for example by the nail plates can be delivered to the construction site without their being joined together by the transverse boards and are only joined, for example screwed together, on site with the transverse boards to form the frame. Thus it is possible to use the prefabricated wall panel as claimed in the invention also for independent construction and to install the insulation of the prefabricated wall panel on site. This results not only in easy handling (low weight of the frame parts and the transverse boards), but also saves transport volume.
For larger prefabricated wall panels there can be diagonal reinforcements. This is feasible especially for corner elements and for individual intermediate elements at larger side lengths of walls of the prefabricated wall panels as claimed in the invention.
REFERENCES:
patent: 2475103 (1949-07-01), Mannist
patent: 3304675 (1967-02-01), Graham-Wood et al.
patent: 4281491 (1981-08-01), Schonert
patent: 5333426 (1994-08-01), Varoglu
patent: 5566523 (1996-10-01), Ozanne
patent: 5987841 (1999-11-01), Campo
patent: 25 19 469 (1976-10-01), None
patent: 2 650 611 (1991-02-01), None
Safavi Michael
Young & Thompson
LandOfFree
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