EP2431549A1 - Corrugated panel roof decking with a tension member - Google Patents

Abstract

The roof covering comprises corrugated plates (1) are laterally screwed up in parallel rows on an inclined sub-structure. The upper edge of each corrugated plate is connected with the lower edge of the corrugated plate of the next higher row by a tension unit (3) which is fixed between the overlapping corrugated plates.

Description

The invention relates to a roof covering with corrugated sheets, which are laterally overlapped on an inclined purlin or slatted substructure in parallel rows and bolted to the substructure, wherein the upper edge of the corrugated sheet of a row engages under the lower edge of the corrugated sheet of the next higher row.

The screw connection with the substructure serves primarily to protect against wind suction forces. The screws are arranged at intervals according to building inspectorate approval or manufacturer's specifications in the apex of the wave crests and at right angles to the plane of the corrugated sheets, that is the roof level, through the corrugated sheet screwed through in the usually made of wood substructure. The screwing increases the static friction between the corrugated sheets in their respective overlapping area. Above this static friction, the self-weight and snow loads are reliably removed up to a roof pitch of about 30 °. As a result, the roof thrust each corrugated plate, which is composed of their own weight and optionally the snow load, in the purlin (or crossbar) is initiated, with which it is screwed. This corrugated roofing has proven itself in roofs without thermal insulation or with a weak thermal insulation boards, which are arranged with a thickness of up to 8 cm below the corrugated sheets, although a satisfactory Method for mathematical proof of fulfillment of the strength requirements does not exist.

For roof pitches above about 30 °, the manufacturers of corrugated sheets prescribe hooks of stainless steel flat material, which at the Dachunterkonst.ruktion, so e.g. at the purlins, are fixed and in which the corrugated sheets are hung in the trough.

Alternatively, wood or metal profiles that run from the ridge to the pipe and lie in the insulation layer are used. Metal profiles form cold bridges and require the use of self-drilling fastening screws.

With a contemporary insulation by means of insulation boards with thicknesses above about 8 cm, which are either under the corrugated sheets, either arranged, occurs even with a roof pitch of less than 30 ° another and serious problem. As a result of the roof thrust acts namely on the correspondingly long screw shafts a bending moment that can no longer accommodate these screw shafts at reasonable diameters without plastic deformation and exert on the purlins or slats a leverage that can rotate these purlins or slats about its longitudinal axis.

The invention has for its object to provide a roofing of the introductory genus, which avoids the above-mentioned disadvantages in all occurring in practice roof pitches, especially in insulated roofs.

This object is achieved in a roofing of the present type in that the upper edge of each corrugated plate in a row is connected via at least one tension member to the lower edge of the corrugated plate of the next higher row.

This ensures that the roof thrust from the ridge to the eaves of the corrugated sheets of each row for the most part to the corrugated sheets of the next lower row to the eaves-side row given and only then removed into the roof substructure. Thus, the fastening screws of the corrugated plate, regardless of their length and thus the thickness of the insulation and regardless of the roof pitch, at least substantially only the protection against wind suction forces, so are no longer or only slightly stressed to bending and practice on the substructure, e.g. the purlins or the slats, no more significant leverage out.

The roofing according to the invention is unnecessary for roofs with large roof pitch associated with the disadvantages described above use of hooks, wood or metal profiles that initiate the dead weight and any snow load of the respective corrugated plate directly into the underlying batten or purlin and thus ablate. Thus, material and assembly time can be saved and any cold spots avoided.

Preferably, the tension member between each other in First-eaves direction overlapping corrugated plates is screwless fixed and hung in particular only in the edges of these corrugated sheets. For largely invisible attachment, the tension member can be arranged in the trough of the respective corrugated plate.

Specifically, the tension member may be formed with its upper end in the upper edge of the lower corrugated plate and with its lower end in the overlapping lower edge of the upper corrugated sheets can be hooked.

In particular, the tension member may be approximately S-shaped for this purpose.

The production is simple and inexpensive if the tension member consists of flat material. However, special cases may require a length-adjustable and thus two-part tension member. Then at least one of the parts of the tension member consists of a rod with a threaded portion and a threaded sleeve.

Preferably, the tension member has an angled upper end with a short cross bar, the free ends are designed to encompass the upper edge of a lower corrugated plate on both sides of the negative vertex or bottom of a wave trough.

This embodiment avoids damage to the roof sheets or underlays, which are often placed under the corrugated sheet roofing.

Alternatively, and with the same advantage, the tension member may be formed at its upper end as a head plate having on both sides lugs for gripping the upper edge of a lower corrugated plate on both sides of the negative apex crest.

Most preferably, the lower end of the tension member is angled in an angled opposite to the formation of the upper end of the tension member to engage around the lower edge of an upper corrugated plate. Alternatively, the lower end of the tension member may be formed analogously to the previously described embodiments of the upper end.

Because the roof thrust, as I said, ultimately and predominantly taken from the corrugated plate of the bottom, that is the eaves row and removed into the roof construction, there are appropriate design measures necessary. For example, the lower edge of each corrugated plate of the bottom row over at least one tie rod with a eaves-side, load-bearing upstand of the roof substructure can be connected to the.

In this case, the tie rod expediently: consist of an approximately S-shaped angle, which engages behind the upstand.

The upstand must be created in such a way that it can absorb and remove the additional roof thrust. For this purpose, the upstand can e.g. be connected via a stiffener for receiving the tilting moment exerted by the tie rod with other parts of the CJachunterkonstruktion,

Fig. 1:

eine vereinfachte isometrische Darstellung eines Ausschnitts eines Dachaufbaus mit Wärmedämmung und hinterlüfteten Wellplatteneindeckung

Fig. 2:

diesen Dachaufbau in einem Teilschnitt längs der First/Trauf-Richtung, d.h. der Linie 11 - II in Fig. 1

Fig. 3:

den gleichen Dachaufbau in einem Schnitt parallel zum First bzw. zur Traufe, d.h. der Linie III - III in Fig. 1

Fig. 4:

einen vergrößerten Ausschnitt aus Fig. 2

Fig. 5:

einen vergrößerten Ausschnitt aus Fig. 3

Fig. 6:

einen vergrößerten Ausschnitt des Traufenbereiches in Fig. 2

Fig. 7:

eine erste Ausführungsform des Zuggliedes in drei Ansichten und

Fig. 8:

eine zweite Ausfiihrungsrorm eines Zuggliedes in drei Ansichten

Fig. 9:

einen anderen Dachaufbau mit unmittelbar auf der Wärmedämmung verlegten Wellplatten in einem Teilschnitt analog Fig. 2

Fig. 10:

den gleichen Dachaufbau in einem Schnitt analog zu Fig. 3.

The roofing according to the invention will be explained below with reference to exemplary and schematic drawings. It shows:

Fig. 1:

a simplified isometric view of a section of a roof structure with thermal insulation and ventilated Wellplatteneindeckung

Fig. 2:

this roof structure in a partial section along the ridge / eaves direction, ie the line 11 - II in Fig. 1

3:

the same roof structure in a section parallel to the ridge or the eaves, ie the line III - III in Fig. 1

4:

an enlarged section Fig. 2

Fig. 5:

an enlarged section Fig. 3

Fig. 6:

an enlarged section of the eaves area in Fig. 2

Fig. 7:

a first embodiment of the tension member in three views and

Fig. 8:

a second embodiment of a tension member in three views

Fig. 9:

Another roof structure with directly laid on the insulation corrugated sheets in a partial section analog Fig. 2

Fig. 10:

the same roof structure in a section analogous to Fig. 3 ,

In all figures, like parts have the same reference numerals. The respective roof structure may comprise a seal of roofing membranes on a case-by-case basis, which is not shown.

FIG. 1 shows a covering of corrugated sheets 1, which are fixed by means of short fastening screws 2 on battens 4. The battens 4 are in turn set to counter battens 5, usually screwed. Under the counter battens is a thermal insulation of insulation boards 6, which rest on purlins 15. The counter battens 5 are, as the basis of FIGS. 2 to 4 will be explained in more detail, screwed through the insulation boards 6 through with the purlins 16. The purlins 16 are mounted on top straps 7, which together with bottom straps 13 are part of the usual binder (not shown). In this far known roof construction and roofing according to the invention each corrugated sheet 1 of the upper row via tension members 3 with the subsequent corrugated sheet 1 of the lower row, here the lowest, that is the eaves row, connected, the tension members 3 are in the respective troughs of the respective corrugated sheets 1.

FIG. 2 shows that the respective tension member 3 connects the lower edge of the upper corrugated sheet 1 in the overlapping area with the upper edge of the subsequent corrugated sheet 1 of the lower row, so that the weight of the corrugated sheet 1 of the upper row and other on loads, caused for example by snow or by-passing , to be removed in the direction of the eaves. Therefore, due to the thickness of the insulating panels 6 very long fastening screws 17, with which the counter-battens 5 are screwed against the purlins 16, not or at least not significantly stressed to bending and transferred in spite of the long lever arm on the purlins 16 no significant leverage.

Thus, the corrugated plate 1 of the lowermost, that is, the eaves-side row takes up virtually all of the thrust force, starting from the corrugated plate of the ridge-side row, in successive first / eaves direction successive corrugated sheets. To initiate this load, the lower edge of the eaves-side corrugated sheet is connected via an S-shaped tie rod 14 with a eaves-side upstand 15, as in detail with reference to FIG. 6 will be explained.

FIG. 3 shows the laterally overlapping laid corrugated sheets 1 in a partially sectioned end view, wherein the cutting line parallel to the ridge or to the eaves under the covering area between the corrugated sheets of an upper and a lower row. FIG. 3 illustrates the arrangement of the tension members 3 in the respective troughs. In principle, however, would also be an attachment to the respective wave mountain.

In FIG. 4 this overlap or overlap area is in an enlarged section FIG. 2 shown. FIG. 4 illustrates, in particular, that the upper corrugated plate 1 would exert on the mounting screw 2 in the head area a lying in the roof plane and thus perpendicular to the screw shaft force, the amount of the weight of the corrugated plate 1, the latter acting on these loads, and before everything depends on the roof inclination. This force would be introduced into the roof batten 4 and the screw not shown in the counter-top 5. Consequently, the counter-blade 5 would exert this force, augmented by the parallel to the roof plane weight forces of the bar 3 and the counter-blade 5 on the head portion of their long fastening screw 17 and thus produce a corresponding bending moment on the screw shaft. The diameter of the screw shank, however, must remain very slender in relation to the length for assembly-technical reasons. Furthermore clarified FIG. 4 in that the screw shank constitutes a lever arm whose length grows in proportion to the thickness or thickness of the insulating panel 6 and which tends to twist the purlin 16.

The in FIG. 5 Enlarged detail shown FIG. 3 shows the position of the tension member 3 substantially in the wellental of the lower corrugated plate, so that the shaft 32, 35 of the tension member 3 (s. Fig. 7 and 8th ) extends substantially non-contact in the space between the upper side of the lower corrugated plate and the underside of the upper corrugated plate, because the corrugated plates rest in the overlapping region with their rising flanks on both sides of the sole of the wave trough. At least of the thrust of the upper corrugated plate in the upper edge of the underlying corrugated plate introductory part of the tension member 3 is formed so that this thrust is distributed to two areas of the upper edge, the lower corrugated plate on both sides of the low point or the sole whose wave trough.

FIG. 6 illustrates the removal of acting on the bottom, eaves-side corrugated sheet 1 roof thrust in the roof structure. For this purpose, the roof construction eaves side has a raised edge 15, z.8. in the form of a reinforced foot purlin.

The lower edge of the corrugated sheet 1 is connected via a number of approximately S-shaped tie rods 14 corresponding to the load with this upstand, in such a way that the inner, angled leg of the tie rod 14th the upstand 15 engages behind in the upper area. Regardless of the corrugated plate 1 is fixed as usual via a mounting screw 2 on the upstand 15.

Because the tie rod 14 on the upstand 15, here as Fußpfette listed exercises a tilting moment, it may be necessary in particular in the case of a roof truss made of wood, the upstand or Fußpfette 15 for removing the tilting moment via a stiffener 12 with the top flange 7 or other supporting Parts of the roof truss to connect. In the illustrated embodiment, the stiffening 12 has the shape of a triangular angle plate, which is bolted via bolts 8 with washers 9 with the Fußpfette 15 and bolt 10 and disc dowel I with the upper flange 7.

FIG. 7 It comprises a shank 32, preferably made of flat material, which is angled at its upper end and formed as a transverse bar 31, the free ends 31a, 31b prepared for embracing the upper edge of a lower corrugated plate on both sides of the sole of the wellentals sirtd (see. Fig. 5 ). The lower end is formed as a hook 33 to engage around the lower edge of an upper corrugated plate.

FIG. 8 shows a second embodiment of the tension member 3. It consists of flat material and has a top plate 34, a shaft 35 whose length as in the case of FIG. 7 essentially corresponds to the coverage area between the respective corrugated sheets and designed as a hook 36 lower end. The top plate 34 has on both sides downwards, in the direction of the hook 36 facing lugs 34a, 34b, which are dimensioned and spaced so that they are analogous to the embodiment according to FIG Fig. 7 when inserting the tension member into a wave trough a lower corrugated plate embrace the upper edge of the lower corrugated plate on both sides of the sole of the respective wave trough.

The lower end of the tension member may also be other than hook-shaped and in particular formed so that it similar to the upper end of the lower edge of the respective upper corrugated plate over a greater distance, in particular at two spaced apart locations embraces.

FIG. 9 shows another type of roofing, in which the corrugated plates 1 on the thermal insulation panels 6 overlapping overlap = rel laid and bolted in the overlap area over long screws 18 directly to the purlins 16. In order to relieve the fastening screws 18 from the components parallel to the roof plane of the weight forces of the corrugated sheets 1 and their possible loads, the corrugated sheets 1 are as in the case of Fig. 1 to 5 connected by tension members 3 with each other. The acting on the bottom, eaves side corrugated sheet 1 roof thrust is analogous to Fig. 6 taken from the roof structure on the upstand 15.

FIG. 10 shows this roof structure in a section parallel to the ridge or to the eaves, ie in a representation analogous to Fig. 3 , Especially Fig. 10 illustrates that the above-mentioned embodiment of the head plates 31 and 34 of the tension member 3 has the advantage that they do not violate in the case of a directly below the corrugated sheets 1 arranged sealing layer of roofing membranes or Unterspanhbahnen.

Claims (12)

Roofing with corrugated sheets (1) laid on an inclined substructure (4, 5, 6, 16) in parallel rows laterally overlapping and bolted to the substructure (2, 18), wherein the upper edge of the corrugated sheet of a series the lower edge of the corrugated sheet engages under the next higher row, characterized in that- the upper edge of each corrugated plate (1) of a series is connected via at least one tension member (3) with the lower edge of the corrugated sheet (1) of the next higher row. Roofing according to claim 1, characterized in that the tension member (3) between each other overlapping corrugated sheets (1) fixed to this screwless, is. Roofing according to claim 1 or 2, characterized in that the tension member (3) in the trough of the respective corrugated sheet (1) is arranged. Roofing according to one of claims 1 to 3, characterized in that the tension member (3) is formed with its upper end in the upper wall of the lower corrugated plate (1) and with its lower end in the lower edge of the upper corrugated plate (1) hooked. Roofing according to one of claims 1 to 4, characterized in that the tension member (3) is approximately S-shaped. Roofing according to one of claims 1 to 5, characterized in that the tension member (3) consists of flat material. Roofing according to one of claims 1 to 6, characterized in that the tension member (3) has an angled upper end with a transverse bar (31), the free ends (31a, 31b) for embracing the upper edge of a lower corrugated sheets on both sides of the negative vertex of a Wellentales are formed. Roofing according to one of claims 1 to 6, characterized in that the tension member (3) is formed at its upper end as a top plate (34) on both sides lugs (34a, 34b) for embracing the upper edge of a lower corrugated sheets on both sides of the negative apex Wellentals has. Roofing according to one of claims 1 to 8, characterized in that the lower end of the tension member (3) hook-shaped (33, 36) opposite to the formation of the upper end of the tension member (3) is angled to engage around the lower edge of an upper corrugated plate. Roofing according to one of claims 1 to 9, characterized in that the lower edge of each corrugated sheet (1) of the bottom row via at least one tie rod (14) is connected to a eaves-side, load-absorbing upstand (15) of the roof substructure. Roofing according to claim 10, characterized in that the tie rod consists of an approximately S-shaped angle, (14) which engages behind the upstand (15). Roofing according to claim 10 or 11, characterized in that the upstand (15) is connected via a stiffener (12) for receiving the tilting moment exerted by the tie rod (14) with further parts (7) of the roof substructure.

Images