Static structures (e.g. – buildings) – Intersection of a cast stonelike component – Cast reinforced vertical and horizontal members
Patent
1989-11-06
1991-01-08
Raduazo, Henry E.
Static structures (e.g., buildings)
Intersection of a cast stonelike component
Cast reinforced vertical and horizontal members
52252, 52283, 52583, 52587, E04B 121, E04B 124
Patent
active
049825372
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a device for joining two building units one of which is load-bearing and the other load-imposing.
Load-bearing and load-imposing building units, such as columns, beams, and walls, are traditionally joined by means of projections formed in a column for supporting beams and walls thereon. The projections may be integral with the column or they can be made of metal and fastened to a completed column.
The first-mentioned alternative complicates the casting of the column due to the complicated shape of the column and leads in expensive moulding works. On the other hand, it is difficult to fasten a separate projection to the column afterwards, and the result is unreliable. In both cases, it is necessary to dimension the projections taking into consideration the torque, shearing force, and normal force. It is also often necessary to diminish the effective height of the structure to a half It is also to be noted that in certain cases some projections may break suddenly A further drawback of these solutions is their unattractive appearance.
The object of the present invention is to provide a joint device for building units, which is easy to manufacture and the structural functionality of which can be ascertained by simple dimensioning conditions. By means of the joint it is possible to eliminate part of the drawbacks caused by constrained forces and to provide a structure which allows large tolerances and displacement without being damaged. Such properties are valuable also in various cases of accident and when constructing an energy-absorbing structure (against impact and vibration loads) A substantial part of the joint may also be formed by the soldered casting between the building units the operation of which depends on the kind and shape of the surfaces of the building units. The device according to the invention is characterized in that the device comprises anchoring means fastened to each building unit in connection with the casting, and a joining means fastened to a first anchoring means for forming a locking device for a second anchoring means, and that the fastening point of the second anchoring means in the building unit and said locking device are positioned in a completed joint at a distance from each other in the vertical direction.
The anchoring means do not complicate the casting of the building units because they can be positioned in such a way that they do not project from the building units during the casting process. Thus there are no projecting structural parts, whereby the parts are easier to manufacture industrially and easier to transport; furthermore, labour and building materials are saved. The flexibility of the anchoring means solves the tolerance problems possibly occurring.
As a result of the structure of the device according to the invention, the load-imposing building unit is in a way suspended from the load-bearing unit. Therefore, in place of torque or shearing forces there occurs mainly traction and/or compression in the joint. This kind of structure is also suited for use in seismic areas.
The advantages of the device according to the invention become particularly apparent when that portion of the second anchoring means which projects from the building unit is flexible. The second anchoring means may thereby consist of flat iron, steel wire rope, glass fibre rope, or the like.
The second anchoring means may be manufactured of one piece or two pieces to be joined only when the building units are interconnected.
At its simplest, the locking device intended for one anchoring means is effected in such a way that the joining means, the first anchoring means, and the building unit together define a pocket for the second anchoring means. The joining means is thereby preferably formed by a plate which is fastened to a supporting plate of the first anchoring means, the plate being positioned on the surface of the building unit in parallel therewith .
In the following the device according to the invention will be described in more detail with reference to the attac
REFERENCES:
patent: 691169 (1902-01-01), Owen
patent: 2103894 (1937-12-01), Bussmann
patent: 2442184 (1948-05-01), Summers
patent: 3513610 (1970-05-01), Devonport
patent: 3733757 (1973-05-01), Scott
patent: 3952468 (1976-04-01), Soum
patent: 4367615 (1983-01-01), Feldman
McGann Ripley Deborah
Oy Lohja AB
Raduazo Henry E.
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