FR2571078A1 - Method for laying shaped roofing plates without cutting the corners and without drilling - Google Patents

Abstract

The invention relates to a method for laying shaped plates, in particular corrugated ones, without cutting the corners and without drilling, which plates have a thickness E >/= 4 mm and are intended for the roofing of buildings. It involves, next to the transverse overlapping between two plates 1' - 1'', the combined use of at least: - a hook 4 intended to simultaneously hold the top end of the lower plate 1' on the purling 2 and to position and retain the bottom end of the upper plate 1''. - an expansible cylinder 11 placed transversely along the top end of the lower plate 1', preferably semi-lapped, and providing, by means of friction, the resistance to the lifting forces as a result of the depression exerted on the roofing.

Description

 The present invention relates to a method for laying without corners cutting and without piercing thick profiled sheets (E> q4 mm), particularly corrugated sheets, and intended for the roofing of buildings whatever their destination.

 It is known to lay fiber-cement corrugated sheets by means of bolts or hook-bolts fixed directly to the roof failures.

This technique now classic and although perfectly reliable, however, has a number of drawbacks for the installer who finally come to soften the price of the cover. First of all, it is necessary to have piercing equipment on site to make the four holes per plate necessary to pass lag bolts or hook-bolts.

Need also to provide on site the cutting of two opposite angles located on the same diagonal of each plate to avoid, at the node of four plates, a quadruple recovery of the four common corners generating cantilevered overhangs at the periphery of the plates and leaks.

 Various solutions have been made to these various problems, so the French Certificate of Utility 2.539.349 filed by the applicant describes a method of laying without drilling the plates and combining metal hooks ensuring the connection of the lower part. plates to the support, as well as glue pads solidarisant the rows of plates in the area of recovery. Thus also the French patent application 2,540,920 filed by the Applicant describes a method of laying without cutting corners of the plates and / or profiled ridge through the implementation of one or more spacer strip in the transversal overlap zone between two plates and excluding the meeting point with the zone for longitudinal overlap.

 But these two techniques although interesting ultimately solve only part of the problem posed during the implementation of the profiled plates and force the roofer is to take measures to cut the corners of the plates while avoiding the formation of dust cutting fines in order to comply with health and environmental requirements, or to provide for the drilling of the fixing holes of each plate taking the necessary precautions to prevent their accidental deterioration.

 The object of the present invention is to avoid all of the above-mentioned drawbacks by means of a laying method which makes it possible to implement profiled roofing sheets without corner cutting and without drilling on most of the roofing support purlins. .

 The plates concerned are thick (E> 4 mm), rectangular, profiled, and can be made of any material but preferably from an aqueous mixture of fibers and cement.

 The laying method according to the invention is characterized by the combined use to the right of the transversal overlap between two plates of hooks of special shape, firmly holding the upper end of the downstream plate on the tip, positioning and retaining the lower end - Re of the upstream plate, and arranged hollow wave of each plate.

 an expandable strand extended transversely along the upper end of the downstream plate and preferably halfway overlay.

 With this combination, the downstream plate of the cover is held firmly in a first time by one or special hooks that allow attachment to the frame while maintaining subsequently between the plates and to the right of recovery a gap of a value -that there is superposition of four thicknesses of plates without overhang or exaggerated yawning.

 In a second step, the expansion of the coil disposed in the transverse overlap between the downstream and upstream plates makes it possible, simply by adhering the product to the cover plates, to complete the fastening of the latter and to oppose the subsequent lifting efforts. depression on the covers.

 The details of the present invention will be better understood by means of the following description and nonlimiting examples, as well as the appended figures among which:

FIGURE 1 is a section of four plates adjacent to the right of their
recovery and implementations without cutting corners and without
use the method according to the invention.

FIGURE 2 is a perspective view of a roof made according to the
laying method according to the invention.

FIGURE 3 shows different variants of hooks according to the type of
breakdown used.

FIGURE 4 is a sectional view of a hook failure after installation on
the upper end of the downstream plate.

FIGURE 5 is a section similar to FIG. 4, but after laying on the
the downstream plate of an expandable coil.

FIGURE 6 is a section similar to FIGS. 4 and 5, but after installation
of the upstream plate in a hook, and expansion of the coil.

FIGURE 7 is a cross-section along AA 'of the cover
after implementation according to the invention.

 As shown in FIG. 1, four corrugated cement fiber sheets (1) were laid without corner cutting on a fault (2) and without using the laying method described in the present application. There are voids (3) between the plates (1) generating overhangs detrimental to the strength and tightness of the cover.

 On the other hand, in FIG. 2, corrugated sheets made of fiber cement (1)> thickness 6.5 mm, length lu52, have been laid using the method according to the invention on faults (2) distant from FIG. . Fixing the purlins uses two metal hooks (4) arranged in wave recesses of each plate, preferably in the first and fourth wave recesses, and the length of which is directly dependent on the transverse covering (R) chosen between the plates. The hooks are made using a metal plate treated anticorrosion and have the following configuration (see Figure 3) a downstream clamp (5) for retaining the lower end of the plate (1) a median body ( 6) consisting of two parts (6 'and 6 ") substantially parallel and interconnected by a sloping recess (7) whose height (H) relative to the two planes determined by the parts (6' and 6") corresponds to the lifting necessary to avoid the overhang between the downstream plates (1 ') and upstream (1 ") and to allow the four adjacent plates to remain in two strictly parallel planes.

 an upstream fixing device (8) hook to the failure and can take, as shown in Figures 3 different forms depending on the type of failure used. Thus, in FIG. 3.1, the fastening device (8) is substantially rounded to ensure proper pinching of the plate (1) on IP N. In FIG. 3.2, the fastening device (8) substantially follows a configuration triangular to ensure a good pinching of the plate (1) on failure type Z. In FIG. 3.3., It is finally constituted by a simple fold at 900 relative to the body (6) and pierced at its center with a hole (9) for the passage of a nail or a screw (10). lock to the wood fault.

 Thanks to the hooks (4), each plate (1) placed on the roof and has a direct attachment in the upper part to the failure (2) opposing the lifting of the upper part of the plate, and a maintenance in the lower part opposing the sliding of the plate downwards. This attachment is completed by the implementation of an expandable coil (II) which by its good adhesion to the cover plates and its good mechanical characteristics, is opposed after expansion and hardening to the lifting forces resulting from the depression on the cover, while ensuring the transverse seal to the right of the overlap between plates.Le boudin (11) is of the one-component polyurethane foam type or similar and is distinguished by its ease of slow expansion and adhesion to the cover plates so that in the half-hour following its implementation, the cover is permanently maintained.

 Figures 4-5-6 make it possible to better decompose by an embodiment the method of laying the various components of the cover (hook-coil-plates) on the frame and specify the logical twist of their implementation. In Figure 4, the downstream plate (1 ') was first placed on the I P N (2). Its upper end is held pinched against the I P N by the metal hook (4). As shown in FIG. 5, an expandable strand (11) is then extended transversely on the downstream plate (1 ') at approximately 10 cm from its upper end, that is to say transversely. Then, and as shown in FIG. 6, the lower end of the upstream plate (1 ") is immediately engaged in the clamp (5) of the hook (4) As shown in FIG. of boudin continues its expansion between the plates locked in their definitive distance by the hooks, fills the space formed at the right of recovery by the median body of the hook (4) and its recess at an angle, adheres to the upper surface of the plate ( 1 ') covered and on the underside of the plate (1 ") overlapping.

 A judicious dosage of the foam makes it possible not to overflow the recovery both upstream and downstream.

 Of course, the invention is not limited to the embodiments that are described, but covers all variants.

Claims (8)

 1. Method for the posessans in cutting corners and without piercing thick profiled plates (E r / 4 mm) intended for the roofing of buildings, characterized in that it makes use of the right of the transverse overlap between two plates (1'- 1 ") to the combined use of at least one hook (4) for both maintaining the upper end of the downstream plate (1 ') on the tip (2), and positioning and retaining the end bottom of the upstream plate (1 "), an expandable bead (11) disposed transversely along the upper end of the downstream plate (1 ') and preferably half-way overlay.  2. Method according to claim 1, characterized in that the hook (4) consists of a downstream clamp (5), a median body (6) formed of two parts (6'-6 ") substantially parallel and interconnected by an angled recess (7), and an upstream fixing device (8).  3. Method according to claim 2, characterized in that the angled recess (7) has a height (H) relative to the two planes determined by the parts (6 'and 6 ") which corresponds to the lifting necessary to avoid the door false between the plates (1 'and 1 ") of cover.  4. Method according to claim 2, characterized in that the upstream fastening device (8) of the hook (4) is of rounded or triangular configuration to adapt to common metal faults (2).  5. Method according to claim 2, characterized in that the upstream fastening device (8) of the hook (4) is constituted by a simple fold at 900 relative to the body (6) of the hook and pierced at its center a hole (9) for the passage of a nail or screw (10) to wood.  6. Method according to any one of the preceding claims, characterized in that the hooks (4) are arranged in first and fourth wave trough plates (1) cover.  7. A method according to claims 1 and 3, characterized in that the expandable bead (11) is disposed on the downstream plate (1 ') in the transverse overlap area and just before the installation of the upstream plate (1 "), so as to fill by slow expansion the space between the plates (1'1 ") by the hooks.  8. A method according to claims 1 - 3 and 7, characterized in that the coil (11) adheres to the surface of the plate (1 ') covered and the underside of the plate (1 ") covering.