Static structures (e.g. – buildings) – Facer held by stiffener-type frame – Lapped multiplanar surfacing attached to substructure...
Patent
1981-12-07
1985-02-19
Perham, Alfred C.
Static structures (e.g., buildings)
Facer held by stiffener-type frame
Lapped multiplanar surfacing attached to substructure...
52531, 52542, 52552, 52630, E04B 702, E04D 134
Patent
active
044997000
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
The invention of this application is disclosed in corresponding International Application No. PCT/SE81/00128 filed Apr. 27, 1981, the benefit of which is being claimed.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a roofing sheet, which is intended to constitute the external roofing, especially at roof constructions, for small houses.
2. Description of the Prior Art
When roofing, for example of sheet metal or glass fiber, is being mounted on roofs of small houses, boarding is attached sparsely or densely between the upper frames of the rafters, before the external roofing is applied. This has been necessary in order to provide the underlying support required by the roofing material. Conventional external roofings, namely, have not had such a size as to extend between two upper frames of adjacent rafters. The reason for this is that the roofings do not have sufficient carrying capacity so that they can be placed on the upper frames of the rafters and be cantilevered therebetween.
BRIEF SUMMARY OF THE INVENTION
The object of the present invention is to provide a roofing sheet which is self-supported between the upper frames of the rafters. This object has been achieved by means of a roofing sheet having an integral edge portion which is shaped to form a beam extending between the rafters to eliminate the need for any additional underlying support.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the invention are described below, with reference to the accompanying drawings wherein,
FIG. 1 is a schematic cross-sectional view showing a roof construction with roofing sheets according to the invention,
FIG. 2 is a view similar to FIG. 1 showing a part of the roof construction on an enlarged scale,
FIG. 3 is a perspective view showing an embodiment of a roofing sheet according to the invention,
FIG. 4 is a perspective view showing an alternative embodiment of a roofing sheet according to the invention,
FIGS. 5 and 6 show schematically the reaction forces at snow load on the roofing,
FIG. 7 is a perspective view of a supporting member according to the invention,
FIG. 8 is a cross-sectional view of a further embodiment of a roofing sheet according to the invention,
FIGS. 9-12 are perspective views of alternative embodiments of the Z-beam on the edge of the roofing sheet,
FIGS. 13 and 14 are cross-sectional schematic views of parts of the Z-beam, and
FIG. 15 is a partial perspective view of an alternative embodiment of the invention wherein the beam portion has a C-shaped cross-section.
DETAILED DESCRIPTION
In FIG. 1 a roof frame 1 is shown. On its upper rafters 2 roofing sheets 3 are attached which have the form of sheet strips extending across the longitudinal direction of the rafters 2. Said strips normally have a width of about 430 mm and a length, which theoretically can vary from the shortest center to center distance between two adjacent rafters up to 6-8 m, i.e. the maximum that can be handled.
In FIG. 2 the roofing sheets 3 are shown in cross-section on a larger scale. As appears from the Figure, the roofings 3 are formed at their upper edge (when installed) as Z-sections 4, which act as beams between the rafters 2 of adjacent frames 1.
At their lower edge (when installed) the roofing sheets 3 have a downward bent edge 5, which terminates with a forward projecting tongue 6.
The roofing sheet 3' shown in FIG. 3 includes between the Z-beam 4' at its rear edge and the downward bent edge 5' a number of grooves 7', which at their highest located edges are interconnected by ridges 8', the extensions of which form the projecting tongues 6'.
As appears from FIG. 3, the upper flange of the Z-beam 4' is provided with two grooves 9', and the lower flange of the Z-beam 4' is provided with a groove 10'. The web, too, of the Z-beam 4' is provided with reinforcing grooves 11'.
Due to the fact that the downward bent edge 5' of a roofing sheet 3' rests on the Z-beam 4' of a roofing sheet lying below, the grooves 7' and the ridges 8' in pr
REFERENCES:
patent: 1150425 (1915-08-01), Gore
patent: 1221370 (1917-04-01), Overbury et al.
patent: 1648081 (1927-11-01), Tyra
patent: 2626577 (1953-01-01), Roush et al.
patent: 2832300 (1958-04-01), Jacobson
patent: 3059733 (1962-10-01), Hermann
patent: 3114218 (1963-12-01), Macquere
patent: 3486277 (1969-12-01), Bauer
patent: 3593479 (1971-07-01), Hinds
patent: 3886705 (1975-06-01), Cornland
patent: 4109438 (1978-08-01), De La Conche
patent: 4189889 (1980-02-01), Yanoh
patent: 4301628 (1981-11-01), Lowe
Perham Alfred C.
Plannja AB
LandOfFree
Roofing sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Roofing sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Roofing sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-606187