Fire-resistant cable entry through a building wall

Abstract

Fire-resistant cable penetration through a building wall (2) made by the following steps: - placing a spacer device (4) on an upper side (3) of a building wall (2), wherein the spacer device is at least partially open vertically at the top - placing a pocket cover (5) on the spacer device (4) to form a pocket (6) which is at least partially open vertically at the top; - Drilling holes (7, 9) into the building wall (2) and into the pocket cover (5); - Passing the cable (8) to be passed through the holes (7, 9); - Filling the interior of the pocket (6) with a hardening filling compound (11).

Description

[0001] The invention relates to a fire-protection-compatible cable penetration through a building wall, which can be manufactured easily and inexpensively from materials commonly available on construction sites.

[0002] Fire-resistant cable entry systems are usually purchased components that are to be inserted into a prepared wall opening through which a cable is to be routed through a building wall, in accordance with installation instructions.

[0003] Often, such fire protection penetrations are not present on construction sites or, for example, there are too few of them.

[0004] Therefore, the task is to specify an easy-to-manufacture fire-protection-compatible cable penetration through a building wall, which is particularly simple to manufacture and can be manufactured using materials commonly available on construction sites.

[0005] These tasks are solved according to the invention with a fire-protection-compatible cable entry through a building wall by the following steps: - placing a spacer device on an upper side of a building wall, wherein the spacer device is at least partially open vertically at the top; - placing a pocket cover on the spacer device to form a pocket which is at least partially open vertically at the top; - Drilling holes in the drywall and in the pocket cover; - Passing the cable through the holes; - Filling the interior of the bag with a hardening filling compound.

[0006] The fire-resistant cable entry according to the invention is characterized by the fact that all components forming the cable entry—the spacer device, the pocket cover, and the filling compound—can be easily and cost-effectively manufactured from non-combustible materials of building material class A1. Such materials are typically available on a construction site that uses drywall construction. Thus, a highly fire-resistant cable entry can be easily constructed from leftover material.

[0007] A preferred embodiment is characterized in that the filling compound is drywall joint filler.

[0008] Such a material for the filling compound easily meets the requirements of building material class A1 (non-combustible).

[0009] Ideally, the hole is drilled through the building wall before the spacer device is installed. Alternatively, the hole may already be in the building wall and a cable may already be routed through it.

[0010] This provides a simple orientation for the cable entry to be made. Furthermore, a hole larger than the cable can be easily created without damaging other components.

[0011] In order to save drilling operations, it is advisable to drill the holes through the building wall and the pocket cover together using a single drilling operation.

[0012] To ensure a sufficient layer thickness of the backfill around the cable to be passed through, it is expedient that the hole in the pocket cover is arranged at least 20 mm away from all edges of the spacer device and from the edge of the pocket cover extending along the open pocket.

[0013] A particularly simple provision of raw material on a construction site can be achieved by making the spacer device and / or the pocket cover from strips or panel sections of gypsum building boards, for example fleece-laminated gypsum building boards or gypsum fiber boards.

[0014] It is also advisable that the building wall is a drywall and that the hole through the building wall is larger in diameter than the cable to be passed through.

[0015] This makes it possible for the filling to penetrate a little through the annular gap around the cable in areas of the drywall paneling as long as it has not yet hardened, thus mechanically securing the cable in the hole.

[0016] The fire-protection-compatible cable entry according to the invention can be manufactured particularly easily if the spacer device is designed as a U or a V that is open at the top.

[0017] The invention is explained below using the drawings as examples. They show: Fig. 1: a plan view of a wall section of a building wall on which a fire-protection cable duct according to the invention is installed; Fig. 2: a vertical section through the building wall with installed fire-resistant cable entry made of Fig. 1; Fig. 3: a horizontal section through the building wall with installed fire-resistant cable entry made of Fig. 1.

[0018] A fire-protection-compatible cable bushing 1 according to the invention ( Fig. 1 to 3) through a building wall 2 has a spacer device 4 which, when viewed from above onto an upper side 3 of the building wall 2, is U-shaped, for example, and which is at least partially open vertically upwards.

[0019] A plate in the form of a pocket cover 5 is placed on a free upper side of the spacer device 4, which covers the upwardly open space defined by the spacer device 4 to the interior of a room defined by the building wall 2. The pocket cover 5, together with the upwardly open spacer device 4 and the building wall 2, defines a pocket 6.

[0020] The pocket cover 5 is arranged at a distance from the upper side 3 of the building wall 2 by the material thickness of the spacer device 4.

[0021] In the event that a feed-through hole 7 for the cable 8 to be passed through the building wall 2 was made in the building wall 2 before the pocket cover 5 was put on, a hole 9 aligned therewith is made in the pocket cover 5.

[0022] The diameter of the feedthrough hole 7 in the building wall 2 is preferably slightly larger than the diameter of the cable 8 to be passed through, creating a circumferential slot 10. A filling compound 11, while still in a pasty state, can penetrate through this slot 10 and thus seal the pocket 6 against the building wall 2 or a gap between the planks of a drywall.

[0023] For the hardenable filler 11, it has proven particularly advantageous to use commercially available joint filler suitable for jointing adjacent plasterboard panels. Alternatively, the hardenable filler 11 can also be gypsum, mortar, or plaster. Such commercially available materials, which are available on almost every construction site, are usually hardenable compounds that, when hardened, form a Class A1 (non-combustible) building material.

[0024] As an alternative to a sequential drilling of the holes 7, 9 into the building wall 2 and the pocket cover 5, this can also be carried out by means of a single joint drilling process.

[0025] An edge distance of the holes 9 in the pocket cover 5 from edges of the spacer device 4 and from the edge of the pocket cover 5 extending along the open pocket 6 is preferably at least 20 mm.

[0026] The pocket cover 5 as well as the legs of the U-shaped spacer device 4 can expediently be made of fleece-laminated gypsum boards and / or gypsum fiber boards by means of suitable cutting.

[0027] The individual parts of the spacer device 4 are fastened to the upper side of the building wall 2, for example, by mechanical fastening means such as screws, nails or staples and / or by gluing by applying joint filler, plaster, mortar or plaster.

[0028] In the same way, the pocket cover 5 can be attached to the outer sides of the spacer device 4. List of reference symbols 1 cable entry 2 building wall 3 Top 4 Spacer device 5 pocket lids 6 bags 7 Hole 8 cables 9 Hole 10 Slot gap 11 Filling compound

Claims

[1] Fire-resistant cable penetration through a building wall (2) made by the following steps: - placing a spacer device (4) on an upper side (3) of a building wall (2), wherein the spacer device is at least partially open vertically at the top - placing a pocket cover (5) on the spacer device (4) to form a pocket (6) which is at least partially open vertically at the top; - Drilling holes (7, 9) into the building wall (2) and into the pocket cover (5); - Passing the cable (8) to be passed through the holes (7, 9); - Filling the interior of the pocket (6) with a hardening filling compound (11). [2] Fire-resistant cable entry according to claim 1, characterized by that the filling compound (11) is drywall joint filler, plaster, mortar or plaster. [3] Fire-protection cable entry according to claim 1 or 2, characterized by that the bore (7) is made through the building wall (2) before the spacer device (4) is placed in place. [4] Fire-protection cable entry according to one of the preceding claims, characterized by that the bores (7, 9) through the building wall (2) and the pocket cover (5) are produced together by means of a drilling process. [5] Fire-protection cable entry according to one of the preceding claims, characterized by that the bore (9) in the pocket cover (5) in the pocket (6) is arranged at least 20 mm away from all edges of the spacer device (4) and from the edge of the pocket cover (5) extending along the open pocket (6). [6] Fire-resistant cable entry according to one of the preceding claims, characterized bythat the spacer device (4) and / or the pocket cover (5) is made of strips or panel sections of gypsum building boards, for example fleece-laminated gypsum building boards or gypsum fiber boards. [7] Fire-resistant cable entry according to one of the preceding claims, characterized by that the building wall (2) is a drywall and the bore (7) through the building wall (2) is larger in diameter than the cable (8) to be passed through. [8] Fire-resistant cable entry according to one of the preceding claims, characterized by that the spacer device (4) is designed as an upwardly open U or an upwardly open V.

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