Static structures (e.g. – buildings) – Disparate sheet lamina between exposed surfaces of wall,... – Tie crossing dividing lamina
Patent
1984-10-03
1986-05-27
Friedman, Carl D.
Static structures (e.g., buildings)
Disparate sheet lamina between exposed surfaces of wall,...
Tie crossing dividing lamina
52478, 52573, E04B 500
Patent
active
045907285
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
This U.S. application stems from PCT International Application No. PCT/SE84/00040 filed Feb. 8, 1984.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a system intended for securing a pre-shaped thin-walled external roofing, supported on a layer of medium-hard insulation, on an underlying carrying roof structure supporting the insulation layer, which system has the form of a strip.
2. Description of the Prior Art
Roof structures using soft and, respectively, hard insulation are previously known.
When soft insulation is used, battens of some kind are provided on the same support (usually sectional sheets), which carries the insulation. These battens are secured on the support and carry the external roofing, which normally consists of sheet metal. The insulation proper, thus, in such a structure has no carrying function.
When hard insulation is used, it is laid on a support (sectional sheets) and thereafter secured on the support by special fastening members. These fastening members comprise a cone-shaped body and a self-tapping screw extending therefrom. Said cone-shaped body co-operates with the hard insulation while the self-tapping screw is caused to engage with the sectional sheet constituting the support. When hard insulation is used, the external roofing material usually is roofing felt, which is fixed with glue on the hard insulation.
The two aforesaid roof structures have certain economic disadvantages. The roof structure with soft insulation comprises special battens for supporting the roofing which, of course, renders the structure more expensive. As regards the roof structure with hard insulation, it is generally known that such insulation is more expensive than soft and medium-hard insulation.
BRIEF SUMMARY OF THE INVENTION
The present invention has the object to provide a system for securing the external roofing, by means of which system it is possible to use relatively cheap medium-hard insulation in a roof structure, in which the insulation itself supports the external roofing.
This object of the invention is realized, in that the system.
An embodiment of the invention will now be described in detail with reference to the accompanying drawing, in which
FIG. 1 is a schematic cross-sectional view of an embodiment of a roof structure, to which the system according to the invention is; and
FIG. 2 is a cross-sectional view taken along line II--II in FIG. 1.
DETAILED DESCRIPTION
The roof shown in FIG. 1 comprises a carrying structure 1 at the lowermost part, which in the embodiment shown is a self-supporting sectional metal sheet with an embossed upper flange 2 and high webs 3.
The carrying roof structure extends between primary girders (not shown) with a spaced c/c-relationship of 6-12 m. The primary girders, thus, extend in the direction of the pitch.
As appears from FIG. 1, an insulation layer 4 is attached above the roof structure 1. The insulation usually is of so-called medium-hard type.
Above the insulation 4 a plurality of supporting strips 5 are arranged with a spaced relationship of 2-3 mm. The supporting strips 5 extend across the pitch direction.
The supporting strip 5 includes a portion 5a abutting the insulation. The cross-section of said portion appears from FIG. 2, i.e. said portion includes a central longitudinal groove recessed about 10-15 mm.
The grooved portions 5a are connected by a crest-shaped portion 5b, the configuration of which has space in the configuration of the external roofing and at least in some part joins to said portion.
As appears from FIG. 1, the supporting strips 5 are jointed in that two grooved portions 5a overlap one another.
The supporting strips 5 are secured in such a way, that screws 6 are passed through pre-drilled holes in the bottom of the grooved portion 5a, and a lower threaded portion 6a of the screw 6 is caused to engage with the upper flange 2 of the self-supporting sectional metal sheet. The screw 6 is threaded in to such a depth that the screw head 6b abuts the bot
REFERENCES:
patent: 3031044 (1962-04-01), Stitf et al.
patent: 3038573 (1962-06-01), Nuernberger
patent: 4250678 (1981-02-01), Skuran
patent: 4348846 (1982-09-01), Bellem
patent: 4516371 (1985-05-01), Simpson
Friedman Carl D.
Plannja AB
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