Static molds – Mold element – In situ construction engineering or building type
Patent
1991-05-13
1992-11-03
Woo, Jay H.
Static molds
Mold element
In situ construction engineering or building type
249 40, 249 44, 249 47, 249190, 249192, E04G 902
Patent
active
051606402
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a formwork panel having edge profiles running round its edges, stiffening girders which are disposed between the edge profiles and serve to stiffen the forming surface, and anchoring locations for formwork tie rods. The anchoring locations traverse the formwork panel and are disposed in spaced relationship to the edge profiles.
Such a formwork panel is known from German Utility Model No. 81 07 576. The anchoring locations for the formwork tie rods traverse stiffening girders and are provided in spaced relationship to the edge webs. These stiffening girders therefore have a hole which weakens the stiffening girder.
The German Utility Model No. 86 30 650 discloses a formwork panel in which the stiffening girders are composed of shaped timber of solid section enclosed by sheet metal profiles. The edge webs are formed by hollow profiles and the anchoring locations are situated in these edge webs. However, the surfaces of these edge webs then have holes through them. Furthermore, when such formwork panels are used horizontally, considerable difficulties arise for anchoring work close to the ground. In addition, anchoring work in horizontal orientation would not be possible for buildings in which jointing strips or plates are to be attached to connecting points.
SUMMARY OF THE INVENTION
The object underlying the invention is therefore to create a formwork panel of the kind mentioned at the outset which--in any orientation--permits formwork tie rods to be attached without difficulty in spaced relationship to the lowermost formwork panel edge. It is to be possible for the forces coming from the formwork tie rods to be conducted into the formwork panel without impairing or making holes in the stiffeners and without deforming the forming surface.
In order to achieve this object, the formwork panel mentioned at the outset is characterized in that at least one transverse connecting piece is arranged between two spaced stiffening girders and is provided with an anchoring location.
In this manner, a formwork panel is produced in which the anchoring location or locations are still spaced from the outer edge profiles so as not to impair them while, at the same time, no weakening or impairment of the stiffening girders occurs. On the contrary, the stiffening girders are even reinforced by the transverse connecting piece.
It thus becomes possible for the formwork panel to be used horizontally close to the ground without preventing or obstructing attachment of the formwork tie rods. In addition, jointing strips and the like can be provided in the region of the joints. The forces coming from the formwork tie rods are conducted into the formwork panels without difficulty. At the same time, arrangement of the anchoring location directly on a stiffening girder is avoided and the tension from the formwork tie rod is distributed over two, preferably parallel, stiffening girders in an advantageous manner.
The external shapes of the stiffening girders may be identical and at least one of the two stiffening girders joined to the transverse connecting piece may be reinforced and/or have a larger cross section than the other stiffening girders. This makes it all the more possible for the forces from the formwork tie rods to be transferred without difficulty. The overall appearance of the formwork panel as regards the stiffening girders is nevertheless uniform. Therefore, any supports, booms and the like engaging these stiffening girders can be attached to all of them using identical fastening means.
The stiffening girders running between the edge profiles may be parallel to one another and to one of the edges of the formwork panel, and may run horizontally in the position of use - hence vertically when the formwork panel is prone. The transverse connecting pieces with the anchoring locations may be disposed between, and approximately at right angles to, two parallel stiffening girders. These transverse connecting pieces are then of minimum length and conduct the tension to the tw
REFERENCES:
patent: 2336253 (1943-12-01), Jennings
patent: 2963763 (1960-12-01), Le Cluyse
patent: 3899155 (1975-08-01), Ward
patent: 4147322 (1979-04-01), Dahlstrom
patent: 4744541 (1988-04-01), Carlson
Kontler Peter K.
Maier Josef
Nguyen Khanh P.
Woo Jay H.
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