Static structures (e.g. – buildings) – Combined
Patent
1982-11-16
1986-12-16
Perham, Alfred C.
Static structures (e.g., buildings)
Combined
52 63, 52 64, 52145, 52407, 52643, 52645, E04B 174, E04B 700
Patent
active
046286470
DESCRIPTION:
BRIEF SUMMARY
In the building branch there is a continuous balancing between how great part of the work shall be performed on the spot (in situ) and how great part shall be pre-fabrication. Often prefabrication of floors, walls and roofs leads to various types of blocks which are joined together at the building site. This results in gain of working time and a reliable level of qualilty. The drawbacks are problems with tightness, joints, transports, handling and adaptability.
The present invention solves this problem by a limited pre-fabrication in the form of a semi-manufactured product, which leaves certain operations to be performed at the building site. The invention provides several advantages with respect to the building procedure. The assembly is quick and gives reliable dimensions and tolerances. There are no problems with joints as between pre-fabricated blocks. The semi-fabricate is easy to handle and cheap to transport and store.
Closer details of the invention appear from the following specification with the following drawings.
FIGS. 1-3, different stages of the mounting of a roof according to the invention.
FIG. 4, a package of girders on a larger scale with an interconnecting flexible layer in contracted state for transport and handling.
FIG. 5, end view of two girders of the package in FIG. 4 after drawing out the package to final position in a roof floor or the like.
FIG. 6, a detail on a still larger scale showing the lower portion of a girder in FIG. 5.
FIG. 7, an elevational view parallel to the longitudinal direction of an embodiment of the girders in FIG. 5.
FIG. 8, an alternative embodiment of the section shown in FIG. 5.
FIG. 1 shows a roof construction comprising main girders 20, one of which is shown in side or elevation view, and secondary girders 10 shown in end view. FIG. 1 illustrates a stage in the mounting of the roof with a package 30 of secondary girders 10 which are moved close together. This package forms a transport unit which facilitates transport, storing and other handling of the girders in connection with their transfer from the place where they are manufactures to the place where they are finally mounted.
In the stage illustrated in FIG. 1 the girder package 30 has been lifted up and placed on the main girders 20, resting on at least two adjacent main girders 20. FIG. 2 shows a further stage where a traction force 31 has been applied to the girder 10a furthest to the left and has pulled this and the subsequent girder 10b from the rest of the package 30. The girders are interconnected by a flexible sheet material or similar 15 at their lower side and a similar layer or one or more flexible strips 32 at their upper side. The opposite end of the package has been pulled out in the opposite direction and is supported by an inclined strut 33. FIG. 3 shows the final mounting stage, the girder package 30 being fully pulled out. The girders are now evenly distributed along the main girders 20, the spacing between them being determined by the flexible ties 15 and 32. An extra strut 33 has been added at the middle of the extended package.
FIGS. 4-6 show on a larger scale a girder system corresponding to the one shown in FIGS. 1-3. In this case the package of girders has been shown as resting on a horizontal support instead of the slightly inclined main girders as in FIGS. 1-3. FIG. 4 shows the girders 10 in contracted state as in FIG. 1, and FIG. 5 shows two girders in drawn apart state corresponding to FIG. 3. FIG. 6 shows on a still larger scale the lower flange 12 with adjoining elemants. The girders consist of an upper and lower flange 11 and 12 respectively and a web 13. In the illustrated case the flanges are supposed to be made of wood and the web of metal as shown in FIG. 7, but this is no necessary requisite in the general adaption of the invention. Between the girders a flexible layer 15 is attached, which can consist of various suitable materials and have various suitable structures as later described. The layer or sheet 15 is attached to the bottom side of the lower flange 12 by
REFERENCES:
patent: 2603171 (1952-07-01), Smith
patent: 2733482 (1956-02-01), Doman et al.
patent: 2780090 (1957-02-01), Rasmussen
patent: 2957483 (1960-10-01), Dunn
patent: 3566562 (1971-03-01), White
patent: 3894370 (1975-07-01), Parazader
patent: 4038788 (1977-08-01), Claessons
Perham Alfred C.
Profoment Utvecklings AB
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