GB2256212A

GB2256212A - Device for constructing a roof from corrugated sheets

Info

Publication number: GB2256212A
Application number: GB9211280A
Authority: GB
Inventors: Alain Remy
Original assignee: SOPLACHIM
Current assignee: SOPLACHIM
Priority date: 1991-05-28
Filing date: 1992-05-28
Publication date: 1992-12-02
Anticipated expiration: 2012-05-28
Also published as: PT100495A; NL194402B; NL9200853A; GR920100209A; ES2063640B1; BE1006842A3; DE4216917A1; ES2063640R; ITMI921094A0; IT1255145B; ITMI921094A1; ES2063640A2; FR2677064B1; PT100495B; GR1002837B; NL194402C; GB9211280D0; FR2677064A1; GB2256212B

Description

? -3 - ', 'I ' C_ j j- 1 - Device for constructing a roof from sheets The

present invention relates to a device f or constructing a roof from corrugated sheets which makes it possible to improve considerably the quality of installation work while achieving a substantial saving of labour.

In order to achieve leaktightness in the construction of roofs from corrugated sheets it is advisable that the corrugated sheets used should be fastened at the crests of the corrugations on the roof purlins or stringers.

This requirement makes it necessary to use corrugation wedges or bows which are inserted under the corrugated sheets at the points where fastening is intended, these corrugation wedges serving the purpose of preventing the crushing of the corrugations of the corrugated sheets at the fastening points.

These corrugation wedges are generally in the form of separate components, the top part of which has a profile matching the profile of the corrugated sheet to be fastened, while the bottom part is supported on the purlins, the wedges being in addition provided with an axial perforation to permit the passage of fasteners for the corrugated sheets. 25 The correct positioning of the successive corrugation wedges, which is generally carried out after the corrugated sheets have been positioned on the roof, is a delicate and time-consuming operation. A simple, inexpensive device has now been developed which permits accurate and considerably facilitated positioning of the corrugation wedges.

The present invention accordingly relates to a device for constructing a roof from corrugated sheets, wherein the corrugated sheets are fastened at the crests of the corrugations by appropriate fastening means on a plurality of roof fastening purlins, the fastening being effected with the aid of profiled corrugation wedges disposed between the corrugations of the sheets and the fastening purlins, which device is characterised in that for fastening the corrugated sheets on each successive fastening purlin use is made of a plurality of profiled 5 corrugation wedges previously mounted on an elongated, non-def ormable, f lexible support, said corrugation wedges being mounted on said flexible support with a constant pitch corresponding to the fastening points desired for the corrugated sheets, and in that said flexible support, equipped with the corrugation wedges, is f ixed on the fastening purlins before the positioning and definitive fastening of the corrugated sheets.

The profiled corrugation wedges may be made of any material, although the Applicant prefers to produce them by moulding in plastics material, in particular in polyethylene.

In the device according to the invention the elongated flexible support is preferably in the form of a strap or tape resisting elongation under tensile load.

The width of this flexible support is preferably substantially equal to the thickness of the profiled corrugation wedges, that is to say the dimension of said wedges measured in the corrugation direction of the corrugated sheets which are to be fastened. It is however quite obvious that this width is not critical. As a general rule the width of the flexible support or tape may vary between 20 and 50 mm and its thickness between 0.5 and 2 mm.

The flexible support may for example advantageously be composed of a plurality of textile cords, which are plaited or disposed parallel side by side, said textile cords preferably being covered or fastened together by a matrix of plastics material.

In one particular embodiment the flexible support is composed of a plurality of textile cords made f rom natural or synthetic fibres and disposed parallel side by side, the support thus f ormed being coated on at least one face with a plastics material, which may in 1 particular be a polyolefin, such as polyethylene.

The Applicant prefers to use as flexible support a tape composed of parallel plaits of polyethylene-coated glass fibres, because this type of support has excellent resistance to elongation under tensile load and has low sensitivity to the effects of temperature variation.

Tapes of this kind already exist on the market and are in general use, particularly for feeding bundling machines.

To make the device according to the invention from a flexible support of this kind it is thus sufficient to fasten a succession of appropriate profiled corrugation wedges thereon, the spacing of the successive corrugation wedges corresponding to the desired fastening pitch, on each successive fastening purlin, of the corrugated sheets used for constructing a roof.

The corrugation wedges may be fastened by any means, such as in particular adhesive bonding or welding, fastening by ultrasonic welding being preferred, particularly in the case of the fastening of profiled corrugation wedges of polyethylene on a polyethylenecoated flexible support.

The first profiled corrugation wedge is preferably mounted on the flexible support at a distance from its end corresponding substantially to half the fastening pitch of the corrugation wedges, and the length of the flexible support is selected so that the last profiled corrugation wedge is also fixed at a distance from the end of the support corresponding to half the fastening pitch of the corrugation wedges. In this way it is possible to lay two successive devices according to the invention end to end while respecting the fastening pitch.

The Applicant prefers to use a polyethylene- coated flexible support or tape and to fix on it, by welding, corrugation wedges also made of polyethylene, but it is quite obvious that other materials and other methods of fastening may also be applied within the scope of the present invention.

The pitch for fastening the profiled corrugation wedges on the flexible support is generally dependent on the type of corrugated sheet to be used and on the orientation of the roof which is to be constructed. This pitch is generally between 70 and 350 mm.

Taking these aspects into account, it is thus possible to produce a plurality of devices according to the invention which have different pitches and different corrugation wedges, and thus to have available a series of devices according to the invention which are appropriate for fastening a wide range of corrugated sheets.

The device according to the invention can be made is so as to have a length which may be as much as 50 metres or more, so that it can be stored in the form of a roll and can be dispensed in the lengths required at the worksite.

For the construction of a r oaf with the aid of the device according to the invention it is thus sufficient to select the appropriate device in accordance with the type of corrugated sheets to be fastened, to fasten said device by stapling, nailing, screwing, or the like on the fastening purlins in such a manner as to ensure correct alignment of the corrugation wedges on the successive fastening purlins in the direction of corrugation of the corrugated sheets used, and then to lay the corrugated sheets on the corrugation wedges, and finally to f asten them on each fastening purlin at the points where the corrugation wedges are situated, with the aid of traditional fasteners.

The correct positioning and fastening of the device according to the invention on the fastening purlins can be further f acilitated by the provision on the f lexible support or tape of reference marks spaced to correspond to the fastening points desired for its fastening on the fastening purlins. In general these reference marks, which may in particular be produced by 1 the ink jet method, are provided on each side of and near each profiled corrugation wedge mounted on the flexible support.

is The device according to the invention can be 5 adapted for the construction of flat, cambered or sloping roofs from corrugated sheets of any type. These sheets may be made of plastics materials, such as polyvinyl chloride or polyester reinforced with glass fibres, or metal or also of fibrocement. and their corrugation profile may be sinusoidal, polygonal or of any other shape. It is in f act suf f icient in each case to adapt accordingly the profiling of the corrugation wedges and/or to choose correctly the type of fasteners screws, hooks, and so on - to be used.

This device may in addition be indiscriminately used for constructing roofs mounted on fastening purlins of metal, wood or any other material.

The device according to the invention and its method of utilisation are in addition explained in detail in the following description of ohe preferred embodiment, in which reference is made to the accompanying drawings, in which:

Figure 1 is a cut view in elevation of a device according to the invention, and Figure 2 is a cut plan view of the device shown in Figure 1.

As can be seen in the figures, the device according to the invention is composed of a flexible support consisting of a tape 1 of great length, on which are fastened, by ultrasonic welding, profiled corrugation wedges 2 spaced apart at a constant axial distance corresponding to the fastening pitch p desired for constructing a roof composed of corrugated sheets.

The tape 1, which has a width of 30 mm and a thickness of 1 mm, is composed of an assembly of parallel plaits of polyethylene-coated glass fibres.

The profiled corrugation wedges 2 are produced by moulding in polyethylene and, in the particular case is illustrated, are adapted for the fastening of corrugated polyvinyl chloride sheets having a polygonal profile. These corrugation wedges have in addition an axial perforation 3 intended for the passage of fasteners used to secure the corrugated sheets.

The length of the tape 1 is selected so that the first and last profiled corrugation wedges can be fixed on the tape at a distance equal to half the fastening pitch p from the ends of said tape.

The tape is also provided with reference marks 4, applied by ink jet, situated on each side of each profiled corrugation wedge 1, and at a short distance from said wedges.

To construct a roof f rom corrugated sheets of the kind indicated above it is appropriate:

- to fasten the device as described along the roof fastening purlins, then to lay the corrugated sheets in such a manner that the profiled corrugation wedges 2 engage in the corrugations of the sheets, - to fasten the corrugated sheets definitively by means of appropriate fasteners engaged in the axial perforations 3 provided in the corrugation wedges 2.

The positioning of the device on the fastening purlins is facilitated by the fact that this is done before the corrugated sheets are laid. In addition, it is sufficient to fasten one end of the device on each fastening purlin in such a manner that the first profiled corrugation wedge is correctly positioned, and then to proceed to the complete fastening of the device on said purlin, simply respecting the reference marks 4, in order to obtain automatically the correct positioning of all the successive profiled corrugation wedges 3. It should also be noted that when a device according to the inven- tion has been used up, continuation with another device poses no problem, the two devices being laid end to end.

In fact it is thus sufficient to ensure the correct positioning of each first profiled corrugation - 7 wedge on each fastening purlin in such a manner as to achieve correct alignment of said first corrugation wedges, to obtain automatically correct alignment of all the successive corrugation wedges provided on the device 5 according to the invention.

As soon as the fastening purlins are equipped with the device according to the invention, it is possible to proceed with the positioning and fastening of the corrugated sheets intended to form the desired roof, respecting the traditional criteria laid down f or the construction of flat, cambered or sloping roofs from corrugated sheets.

The invention is described hereinbefore by way of examples only and numerous modifications of detail will be apparent to those skilled in the art which fall within the scope of the appended claims.

Claims

1. Device f or constructing a roof f rom corrugated sheets, wherein the corrugated sheets are fastened at the crests of the corrugations by appropriate fastening means on a plurality of roof fastening purlins, the fastening being effected with the aid of profiled corrugation wedges disposed between the corrugations of the sheets and the fastening purlins, characterised in that for fastening the corrugated sheets on each successive fastening purlin use is made of a plurality of profiled corrugation wedges previously mounted on an elongated, non-deformable flexible support, said corrugation wedges being mounted on said flexible support with a constant pitch corresponding to the fastening points desired for is the corrugated sheets, and in that said flexible support, equipped with the corrugation wedges, is f ixed on the fastening purlins before the positioning and definitive fastening of the corrugated sheets.

2. Device according to Claim 1, characterised in that the profiled corrugation wedges are made of plastics material.

3. Device according to Claim 1, characterised in that the profiled corrugation wedges are made of polyethylene.

Device according to Claim 1, characterised in that the flexible support is composed of a tape resisting elongation under tensile load.

5. Device according to Claim 1, characterised in that the flexible support is composed of a plurality of textile cords optionally covered with a matrix of plastics material.

6. Device according to Claim 1, characterised in that the flexible support is composed of parallel plaits of polyethylene-coated glass fibres.

7. Device according to Claim 1, characterised in that the profiled corrugation wedges are mounted on the flexible support by adhesive bonding or welding.

4.

8. Device according to Claim 1, characterised in that the flexible support is provided with reference marks spaced to correspond to the fastening points of the flexible support on the fastening purlins.

9. A device as hereinbefore described, with reference to the drawings.