AU5825799A

AU5825799A - A profiled strip for covering a ridge of a roof

Info

Publication number: AU5825799A
Application number: AU58257/99A
Authority: AU
Inventors: Urs Aeberli; Josef Hunold
Original assignee: Daetwyler Ag Schweizerische Kabel Gummi und Kunststoffwerke; Eternit AG
Current assignee: Daetwyler AG Schweizerische Kabel Gummi und Kunststoffwerke
Priority date: 1998-11-09
Filing date: 1999-11-04
Publication date: 2000-05-11
Also published as: ATA185898A; AT406398B; EP1001106A1; EP1001106B1; DE59911587D1; ATE288977T1

Abstract

The vanes (6) extend over the height of the vertical rib (2) and on the lower section of the vertical rib in symmetrical arrangement deformation sections (8) are formed with an outer uprightly running limiting edge (9). The limiting edge has an outer nose-type step formation (10), the locating edge of which is directed upwards. The vertical rib is of the hollow chamber type and its hollow chambers (3,4,5) are arranged one above the other.

Description

AUSTRALIA

Patents Act 1990 Daetwyler AG Schweizerische Kabe-, und Kunststoffwerke; Eternit AG

ORIGINAL

COMPLETE SPECIFICATION STANDARD PATENT .8b Invention Title: A profiled strip for covering a ridge of a roof The following statement is a full description of this invention including the best method of performing it known to us:- The invention concerns a profiled strip made from elastomeric material for covering the ridge of a roof.

Sloping roofs with large-area planar covers have to be ventilated from below due to building-physical reasons. Generally speaking, for this purpose in the region of the eaves, the deepest point of the roof, and in the region of the ridge, the highest point of the roof, openings are produced, where air can enter or exit during wind movements or due to the so called chimney effect.

In the following some known ridge coverings are discussed, which in conjunction with the roof cover make the necessary air ventilation feasible.

For reasons of statics single-shell large-area roof covers are made using corrugated or trapezoidal cross-sections. Consequently, there is a greater flexural stiffness in the direction of the slope and at the same time a channel is provided for the water to be removed, which can be used to provide the buttings of the sheets at the top, i.e. on the peak of the corrugation and thus 15 outside of the lower situated water-conveying channel.

In this application continuous ridge cappings are known. They are *.**fitted into the slopes of the roof areas and installed in the region of the ridge at a distance from the covered area. They may be manufactured from the same material as the roof cover or from another stable and weather-proof .20 material. The sheets, forming the membrane of the roof, terminate under the cover and are at a small distance of a few centimetres from each other, i.e. to the cover or the membrane of the roof on the other side of the roof.

Particularly in the case of roofs with slight slopes and in windy areas, the overlap of the ridge capping has to extend relatively far past the ends of the sheets, so that no rain water or snow can travel upward past the ends of the sheets. The length of the overlap has to suit the height of the trapezoidal geometry and the corrugation of the sheet.

Furthermore, bent cover sheets are used as ridge covers. Such ridge coverings are produced as separate formed parts and both ends are made to suit the geometry of the roof cover. As a rule this geometry is reduced towards the ridge and blended into a flat, which is bent in the immediate vicinity of the ridge to correspond to the slope of the roof. These elements can be installed with spacers without rear ventilation directly on the roof covering or in accordance with a desired cross-section for ventilation. The manufacture of such formed parts is relatively expensive. Depending on the slope of the roof, formed parts suiting the respective angle of the roof have to be produced and kept in storage as standard products.

Furthermore, variable ridge coverings made from a plurality of formed parts are known. In the case of this known construction a semi-shell is installed in the immediate vicinity of the ridge with its opening downward, which is independent from the slope of the roof. To prevent the penetration of wind-driven snow or rainwater, formed parts are installed on both sides of the roof area, which formed parts are made to suit the roof geometry in the deeper regions on the one hand and cover with an upward directed incline the end of the semi-shells at a small distance on the other. In the case of this construction the wind is deflected, so that it cannot carry snow or rain under the semi-shell. The disadvantage of this construction is the use of a plurality of individual parts which are relatively expensive to produce and, in **addition, have to be installed individually.

15 The invention is based on this state-of-the-art and its objective is to produce a considerable improvement, as a matter of fact concerning both the *.manufacture and installation.

The profiled strip according to the invention made from elastomeric material to cover ridges of roofs is characterised by a central web, to an upper end of which, on both sides, outwardly directed flanks are joined, which flanks extend over a height of the web and at a lower section of the web symmetrical deforming sections are moulded, one on each side of the web, each section having an external boundary edge, extending substantially parallel to the web, the boundary edge having an external beak-like step and a mounting edge or contact edge of this step being directed upward.

Whereas all known ridge covers are produced from individual elements which are flexurally rigid to a great extent, in the case of the new solution according to the invention an elastomeric material is used, which can be manufactured, stored, transported and installed in long rolls. The crosssection of the profiled strip is essentially a roof-shaped element, which by virtue of its elasticity is so pre-tensioned that it can cover two almost perpendicular roof areas which are also parallel to each other, while in the open state it fits very slightly sloping roofs. The lower part has two symmetrically constructed deforming bodies, which can be compressed to different widths and thus can be pressed into the wedge-shaped gap between the faces of the sheets, those sheets which form a covering of the roof.

Towards the external sides on each of these deforming bodies, a beak-like step is formed, which snaps in below the lowermost sheet ends of the roof cover and thus protects the profiled strip against being pulled out upwards.

The upper and lower parts of this profiled strip are joined by means of a vertical web in a tension- and compression-resisting manner. The crosssection of this vertical web is relatively rigid, so that it will not buckle under a pressure from above while the profiled strip is being pushed in. It should, however, have a relatively rigid cross-section in the longitudinal direction also combining the lower and upper parts, as in the case of groove-shaped sheets the steps abut only at the bottom in one point, and in the region of the peaks of the corrugation, where the deforming force of the upper roof is basically active, they are free. The relatively rigid longitudinal cross-section must be able to transfer the differently introduced forces.

~The invention is described with reference to the accompanying i 15 drawings, without limiting it to the embodiment shown. They show in: Fig. 1 a cross-section of the profiled strip, and Fig. 2 the profiled strip according to Fig. 1 inserted into a ridge of a roof, also in cross-section.

A profiled strip 1, illustrated in cross-section in Fig. 1, has a central 20 vertical web 2, which has several hollow chambers 3, 4 and 5, positioned above each other. At an upper end of the web 2, on both sides, downward directed flanks 6 are joined to it, which extend over the height of this vertical •web 2. These flanks 6 are longer than the height of the vertical web 2, while the bottom ends of these flanks 6 overlap each other. The flanks 6 are slightly bent, so that the peripheral contour of the profiled strip 1 is slightly egg-shaped. In the top part of the vertical web 2 laterally protruding support sections 7 are provided, which are joined with an inside of the respective flank 6.

Furthermore, in a bottom region of the vertical web 2, symmetrically arranged deforming sections 8 are moulded on, which have an external, essentially vertically extending boundary edge 9. Each external boundary edge 9 has an external beak-like step 10, whose mounting edge or contact edge is free in the upward direction. These deforming sections 8 are here circumferentially enclosed. The height of each section 8 is approximately 1/4 of the height of the vertical web 2. These deforming sections 8 have basically rhombic cross-sections, while legs 11, 12, protrude outwardly from the vertical web 2 and form the deforming sections 8, are directed at a shallow angle upward relative to the horizontal. The insides of the downward extending flanks 6 abut against the deforming sections 8 or are spaced a small distance from these.

Fig. 2 illustrates the application of the profiled strip as intended in conjunction with a roofing cover made from corrugated sheets 13, while in this case only those sheets 13 are shown which form a covering of the roof, but not its support construction. The flanks 6 of the profiled strip 1, which is inserted between the sheets 13, lie on upper surfaces of the corrugated sheets 13. The deforming sections 8 are compressed slightly against the centre and abut against respective lower sections of the ends 14 of the corrugated sheets, as this is clearly illustrated here. Since the sheets 13 have a corrugated cross-section, the faces of these sheets 13 abut against the step 10 basically at points.

S 15 The upper roof-shaped construction of the profiled strip 1 diverts the rain and snow to the sides. For visual reasons, furthermore for cost and manufacturing reasons, it should be kept as narrow as possible (when viewed longitudinally) and thus no large overlaps of the ends of the sheets are present, therefore a baffle threshold is produced, which prevents rainwater or 20 snow entering between the ends 14 of the sheets 13. Since the waterconveying stratum is always in the valley region, it is sufficient to have a relatively low baffle threshold which encloses the end of the valley. This S• baffle threshold is formed in this case by the top edge of the bottom deforming body, which is accurately positioned by means of the step situated on it, while this step prevents its slipping out upward by virtue of tension.

During the ventilation function, which is triggered from below by the suction effect from above, due to the wind sweeping over the ridge or due to the chimney effect, a vacuum is triggered from below and the air flows from below in the direction of the peak of the corrugation, then it exits in the direction of the ridge profile, flows between the faces of the sheets and the vertical web of the profiled strip in the longitudinal direction up to the valley of the corrugation and can reach the atmosphere through the valley under the roof-shaped cover.

The ventilation area is limited by the cross-section of the peak of the corrugation minus the baffle threshold on the one hand and by the distance between the end of the roofing sheets and the vertical web of the profiled 6 strip on the other. For this reason the profile's web is kept relatively narrow to make the cross-section for ventilation large. The profiled strip is made from one piece and from an elastomeric material. As a result of the elastic deformability of the elastomeric material, the profiled strip can be used for all conventional gabled roofs without the need to consider the slope of the roof.

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Claims

1. A profiled strip made from elastomeric material to cover ridges of roofs, characterised by a central web, to an upper end of which, on both sides, outwardly directed flanks are joined, which flanks extend over a height of the web and at a lower section of the web symmetrical deforming sections are moulded, and on each side of the web, each section having an external, boundary edge, extending substantially parallel to the web, the boundary edge having an external beak-like step and a mounting edge or contact edge of this step being directed upward.

2. A profiled strip according to claim 1, characterised in that the deforming sections are circumferentially enclosed.

3. A profiled strip according to claim 1, characterised in that the flanks are longer than the height of the web.

4. A profiled strip according to claim 1 or 3, characterised in that the bottom ends of the flanks overlap each other.

5. A profiled strip according to claim 1, characterised in that its peripheral contour is slightly egg-shaped.

6. A profiled strip according to claim 1 or 2, characterised in that a height of the deforming section is approximately 1/4 to 1/3 of the height of the web. 20

7. A profiled strip according to claim 1, characterised in that the web is I constructed as a hollow chambered web.

8. A profiled strip according to claim 7, characterised in that the hollow chambers of the web are arranged above each other.

9. A profiled strip according to claim 1 or 7, characterised in that, in the top part of the web laterally protruding support sections are provided, which are joined with an inside of its respective flank.

A profiled strip according to claim 1, characterised in that insides of the downward extending flanks abut against the deforming sections.

11. A profiled strip according to claim 1, characterised in that the deforming sections have a basically rhombic cross-section.

12. A profiled strip according to claim 11, characterised in that the legs protruding laterally away from the web and forming the deforming sections are directed at a shallow angle upward relative to the horizontal.

13. A profiled strip according to any one of the claims 1 to 12, characterised in that it is made from one piece. 8

14. A profiled strip substantially as described herein with reference to the accompanying drawings. Dated this fourth day of November 1999 Daetwyler AG Schweizerische Kabel-, und Kunststoffwerke; Eternit AG Patent Attorneys for the Applicant: F B RICE CO ft J