Fire protection cable penetration seal, method of installation and arrangement

Abstract

Fire protection cable penetration seal (1) for installation in a wall opening between two structural fire protection sections in a building, in particular for installation in a wall opening in a system floor between the unfinished floor and raised floor panels, wherein the fire protection cable penetration seal (1) comprises a one-piece sheet metal construction with at least one side wall (12) and a cover sheet (11), whereby the sheet metal construction spans a space for accommodating or passing through cables or lines, and wherein a first section of the cover plate directed away from the room is designed for a material-locking or form-locking connection with masonry mortar or fresh concrete, and wherein at least a second section of the cover plate facing the room is provided with fire protection compounds, and wherein at least the sheet metal construction is designed to transmit a first part of vertical loads and / or vertical forces, characterized in that the fire protection cable penetration seal (1) comprises a raised floor support (3), wherein the raised floor support (3) is designed to transmit a second part of the vertical loads and / or the vertical forces by means of the raised floor support (3).

Description

[0001] The invention relates to a fire protection partition for the passage of lines or cables through partition walls between two structurally separate fire protection compartments, in particular in the area of ​​low system floors.

[0002] Fire barriers for raised floor constructions have become known which comprise a half-shell which is open on one side and in whose inner surface a flat, flexible support is arranged which is at least partially coated with an intumescent layer on its surface facing the interior of the half-shell, and whose opening is closed by a flat, flexible support whose surface facing the interior of the half-shell is also coated with an intumescent layer.

[0003] A "half-shell" is understood to mean a part, preferably but not necessarily one half, of a hollow body which, together with another half-shell, would form a hollow body. For example, it can be a part with a circular ring-shaped cross-section, for example semicircular, semi-elliptical or semi-polygonal. "Semi-polygonal" in this context means a section of a polygonal cross-section. Irregular shapes are of course also possible, although not preferred. In particular, a "half-shell" is understood here to mean a generally channel-shaped or U-shaped device that can accommodate cables, pipes or the like. The half-shell spans a fire-safe space for the passage of cables or other lines from one structural fire protection compartment to another.

[0004] Rectangular building elements for fire sealing underfloor cable ducts and fire-protection cable penetration seals in raised floors have also become known for this application. The fire-protection cable penetration seal is arranged between the bare ceiling and the floor slabs installed at a distance above it, and the cables are routed smoke-tight across a rigid sill made of fire-resistant material. A fleece seal is arranged in the space between the sill and the floor slabs above it. The easily compressible fleece seal serves, on the one hand, to provide a permanent fire gas seal between the structural fire protection compartments and, on the other hand, to prevent the vertical load or force transmission between the raised floor construction and the sill, thus preventing the transmission of mechanical influences from the raised floor construction to the fire protection seal.

[0005] Fire-resistant cable seals of the type described in the invention are known and are referred to as cable boxes in the practice of structural fire protection. These typically consist of a thin-walled sheet metal construction formed into a frame with openings on both sides suitable for the passage of cables or lines. They are installed in wall or ceiling openings between two fire protection compartments of a building in an airtight or gas-tight manner. In addition to this gas-tightness, cable boxes are equipped or coated on the inside with fire-resistant compounds which, in the event of a fire in one of the fire protection compartments, can expand upon a certain heat exposure and also seal the interior of the cable box against the penetration of hot fire gases into the other fire protection compartment. In construction practice, installation in a wall opening is carried out using conventional mortar, construction foams, or other well-known building materials.Larger holes in the wall opening are usually closed with bricks, grouting mortar, insulation materials, construction foam or similar and sealed against the penetration of fire gases through the sealing structure with well-known sealants such as construction foam, liquid mortar, filler, silicone or similar.

[0006] Known four-sided fire protection cable penetration seals, for example, have a housing made of sheet metal pieces with folded fastening flanges, with an upper wall and a lower wall, as well as a left side wall and a right side wall. The walls are hooked together, for example by means of folded edges, and are thus firmly connected. The side walls are less high than the length or width of the upper or lower wall sides. Accordingly, this type of cable box has a cuboid shape. The housing-shaped fire protection element should not only have panel-shaped fire protection packings consisting of fire protection agent on the outer walls, but also at least one intermediate wall, which should preferably consist of panel-shaped fire protection agent, wherein at least one removable and installable fire protection plate is provided, which extends through the cable chamber enclosed by the fire protection packings.The design is intended to provide a fire protection element with comparatively large cross-sectional dimensions without compromising the effectiveness of the fire protection and without using an excessive amount of fire protection agent.

[0007] Also known, for example, is a fire protection arrangement for the smoke-tight passage of cables and / or empty pipes and / or cable trays through an opening in a wall or ceiling, comprising a mineral fiber bulkhead with at least one mineral fiber board, which at least partially closes the opening, and at least one fire protection device which has two side walls and a cover and / or a base, between which a space is provided for the passage of the cables and / or empty pipes and / or cable trays, wherein the fire protection device further comprises fire protection means which can expand at elevated temperatures in such a way that they can close the space for the passage of the cables and / or empty pipes and / or cable trays in an at least largely smoke-tight manner.

[0008] The gap between the essentially flexible fire protection device and the reveal of the wall opening is sealed with mineral fiber boards. It is generally known in construction engineering that polymer foams or mineral fiber boards can only transfer forces to a limited extent for structural stability verification purposes. Such structures are disadvantageous in that they are unsuitable as replacements for load-bearing or gap-spanning door thresholds or lintels, or for transferring vertical loads from a floor system.

[0009] In practice, similar constructions or structural sealing structures made of fire-protection materials are known as mortar or mineral fiber firewalls. In principle, an existing component opening or wall recess in a partition wall between two structural fire compartments in buildings is first sealed in a self-supporting, fire-gas-tight manner using a hardenable building material or a fire-resistant insulation material, for example, in the form of mineral fiber boards or blocks. Individual or bundled lines or cables can later be installed in such fire-protection-safe constructions or inserted through appropriate holes.

[0010] Fire protection compounds are materials that can be used alone or as components of special construction elements, structures, and prefabricated parts for the purpose of preventive fire protection. The specific properties and modes of action of intumescent fire protection compounds, or those that expand upon exposure to heat, have been known for many years. These compounds can be powder mixtures, granules, sealants, fibrous materials, or adhesives, or rubber-like, soft, semi-rigid, or rigid thermoplastics, thermosets, or vulcanizable materials, which in turn can be used as films, solid or porous or foam-like profiles, molded bodies, and other semi-finished products.

[0011] Rectangular fire barriers or cable boxes are also known in practice. These are installed in a ceiling opening directly against a wall, or in a wall opening directly against the ceiling or subfloor, and therefore do not require a fourth sheet metal side. Such fire barrier constructions are also referred to as three-sided cable boxes. Typically, such cable box constructions consist of at least two shorter sheet metal sides as side walls and one longer sheet metal side as the cover plate. Additionally, flanges or lugs can be arranged on the free edges of the side walls for supporting the cable box on a floor or for fastening it to a wall surface.

[0012] Such three-sided cable boxes can also be supplemented with two-sided cable box attachments, which consist of at least one side wall and the cover plate, to create a fire protection partition with an overall larger clear opening cross-section. The benefit of such cable boxes results primarily from the favorable ratio between the size of the structurally available wall opening and the actual cross-sectional size of the fire protection partition available for the cable or line penetration.

[0013] Depending on the size or span of the cover plates or walls between the side walls in relation to the sheet thickness, the construction is relatively flexible, so the cover plate of the cable box can bend or deform when installed in a wall opening or when bricking over a three-sided cable box with floor support. In practice, it is irrelevant whether the cable boxes or single-piece or assembled half-shells are a relatively flexible support or folded-plate construction made of metal or plastic.

[0014] Therefore, conventional fire protection barriers such as cable boxes must not be subjected to additional vertical loads, or they are not suitable for absorbing relatively large vertical loads. For conventional fire protection barriers under structurally sound door sills, soft fire protection materials are placed above the cable box to largely prevent vertical load transfer to the top or cover plate of a cable box, or to prevent adverse deformation of the cable box.

[0015] For structural reasons or for reasons of structural stability, cable ducts or pipe runs under doors, for example, must be bridged with a structurally sound threshold structure or load-bearing cross-member. However, sufficiently strong door sills with a component height required to support the load limit the remaining opening cross-section for cable or pipe routing under the door. Alternatively or additionally, load-bearing bricks, aerated concrete blocks, or similar materials are known to be inserted into the duct opening to reduce the span of the door sill or support plate, but these also adversely reduce the size of the remaining clear opening cross-section.

[0016] System floors that create a cavity between a subfloor and the slab are also called hollow floors or raised access floors. Hollow floors are system floors with a seamless, poured screed base layer with a cavity of up to 200 mm in clear height. Hollow floors with a cavity of more than 200 mm are treated as raised access floors. The installation height, as a vertical dimension of the system floor, is specified as the distance between the subfloor and the top edge of the subfloor or raised access floor slab.

[0017] System floors provide a hollow space beneath a sub-base for flexible use and to accommodate all types of installations, supply and disposal lines. Integrated access floor trays for installing telecommunications, electrical connections, heating, ventilation, etc. are called raised access floor trays.

[0018] Access floors are prefabricated system floors consisting of support panels and studs, or are defined as a substructure type of system floor constructions for the interior fit-out of buildings. Their components consist of factory-prefabricated modular components (accessory raised floor panels, substructure elements, and building elements as accessories). This type of system floor construction is also referred to as a raised floor. The raised floor system is created by assembling the individual components. A raised floor system allows free access to the floor cavity at any point by inserting individual raised floor panels.

[0019] A control room raised floor is a raised floor variant with high demands on transverse stability. The system consists of supports and profiles (so-called C-profiles) that are arranged on the supports and connected to them (e.g., bolted). The raised floor panels are mounted on the profiles.

[0020] Raised floors consist in particular of individual elements such as raised floor panels, with or without floor covering, raised floor supports for different construction or assembly heights, additional parts such as support head supports or support elements, grid bars as spacers, linear supports made of C-profiles, steel cross members as load-bearing and / or sealing and / or horizontally stiffening components, bridging elements, wall connection elements or connection profiles for different system floor constructions, etc.

[0021] A structure located beneath the raised access floor slabs (base layer) for load transfer and load distribution into the subfloor is called a substructure. The base layer consists of the load-bearing raised access floor slabs connected to it or rests on the substructure. A support element or column is a substructure element for transferring forces from the base layer into the subfloor. Common raised access floor supports consist of two parts that can be screwed together in a cylindrical shaft or post and are therefore also height-adjustable. As a rule, the supports are arranged in a square raised access floor slab grid of 600 mm each. However, the column grid, as a horizontal, direction-dependent grid (spacing) between the support elements, can also be independent of the slab grid. Additional supports can be arranged for reinforcement under particularly stressed slab areas.The load-bearing capacity of the system floor with concentrated loads, which is derived from the intended use, is referred to as point load.

[0022] The wall connection of a system floor is achieved using a wall connection strip, which allows for relative movement between the building structure and the system floor and reduces structure-borne sound transmission. Cable or line penetrations through walls or building ceilings are known, for example, as fire-protection cable bulkheads or cable boxes. Wall penetrations with a partitioning function between separate rooms are common construction practice.

[0023] If there is no common wall between two raised floor areas for a wall penetration, for example between a room and a hallway, cables or lines must be routed below the door threshold. If the system floor has a sufficiently high installation height and the door thresholds can load-bearing bridge known fire seals or if the raised floor system can bridge known cable boxes in a structurally sound manner, then known fire seal systems can be used. One such fire protection cable seal has been proposed, for example, in DE 299 24 060 U1. However, known cable seals of this type have the disadvantage that they cannot absorb vertical loads or stresses and therefore have to be bridged by trusses, lintels or other supporting structures, and the movement joints have to be sealed against the penetration of fire gases with soft overlays, such as fiber fleece.

[0024] In construction practice, however, it can happen that, in the case of low raised access floors whose structure changes in the doorway between two rooms, a structurally sound door sill construction that could bridge existing cable boxes according to structural requirements is not safely feasible. For example, in order to ensure sufficient clearance for laying cables or other lines, a structurally sound bridging structure using independently acting beams or lintels is not practical or easily feasible due to the lack of structural height.

[0025] For this reason, it is known, among other things, to arrange several relatively small cable boxes with bricks or similar support structures in between, or to fill the spaces between the cable boxes with concrete in order to reduce the span of the door lintel or threshold structure. However, this disadvantageously results in less space for cable entry points below the door threshold.

[0026] DE 199 59 494 A1 discloses a fire-protection cable seal in a raised floor between the bare ceiling and the floor slabs installed at a distance above it. To provide a smoke-tight wall seal in the space between the bare ceiling and the floor slabs, which minimizes the impact on the resilience of the floor slabs, the invention proposes that the cables be routed smoke-tight across a rigid sill made of fire-resistant material, with a fleece seal arranged in the space between the sill and the floor slabs above.

[0027] DE 90 14 517 U1 discloses a fire protection element with a galvanized sheet metal casing. The casing is permanently installed in the building wall or ceiling. The polygonal interior of the casing defines the passage opening for the insulated metal pipe. A conventional fire protection package is held against each flat inner wall of the sheet metal casing by beveled edges. The dimensions are selected so that each fire protection package is positioned as close as possible to the insulation of the metal pipe. The fire protection packages consist of sheet-shaped containers made of thermoplastic material, filled with a fire protection material, such as that known under the trade name Palusol.When heated above 120°C, the plastic melts and the fire-resistant material expands, completely filling the space between the inner walls of the metal can and the pipe. The insulation is compressed to such an extent that a complete fire barrier is created, preventing the fire from spreading from one space to another. The number and thickness of the fire protection packages depend on the thickness of the insulation and the diameter of the pipes, respectively. The length of the fire barrier depends on the prescribed fire resistance period.

[0028] DE 20 2004 011 259 U1 discloses a fire-protection cable entry system with a housing open on both sides and an interior space. The housing is equipped with a compound that fills the interior of the housing at least partially when exposed to heat. An insulating material package is provided within the housing. The insulating material package fills the housing only partially and is provided on one or both sides of the housing opening.

[0029] DE 102017 100 277 A1 discloses a fire protection device for installation in a recess of a building wall and / or a building ceiling. The fire protection device comprises a housing and an intumescent material arranged within the housing. The housing has two openings at its ends for the passage of cables and / or pipes through the fire protection device. The fire protection device comprises a heat-insulating solid material arranged within the housing.

[0030] In order to be able to produce safe and user-friendly fire protection partitions in the underfloor area of ​​a door even under very confined spatial conditions, a partition according to claim 1 is proposed.

[0031] Advantageous embodiments of the proposed partitioning are specified in the subclaims and shown in the drawings. Reference symbol 1 cable box, sheet steel housing, sheet metal construction, folded construction 11 Cover plate 12 side wall 13 Connection lug, floor connection lug 120 hole, slot, sheet metal recess, drilling point, 2 raised floor panels 3 raised floor support, support, 4 Fire protection compound 14 Composite interlayer, fiber layer, composite fleece, fabric, felt, 30 Assembly or formwork aid 40 bricks, mineral insulation material, aerated concrete block 50 assembly or formwork aid 70 mounting support discs 90 support or hole sealing elements Fig. 1 shows a cable box (1) in a plan view with a schematic representation of selected components or design features: Sheet metal construction (1), consisting of cover sheet (11), side walls (12) and floor connection lugs (13) with holes (120), formwork or assembly aids (30, 50, 60), brick (40), assembly support discs (70), and support or hole sealing elements (90). Fig. 2 shows exemplary arrangements and designs of holes (120) in the cover plate (11) of the cable box (1) in the form of punched-out portions (120) or recesses (120) in a schematic representation. Fig. 3 shows a cable box (1) with cover plate (11), two side walls (12) and floor connection lugs (13), in which the upper side of the cover plate is curved upwards for the secure application of masonry mortar or fresh concrete and wherein the cover plate (11) and the fire protection compounds (4) in the form of films or plates are provided with a through hole (120) for the passage of a raised floor support (3) for the transmission of vertical loads or forces from the raised floor plates (2) to the unfinished floor, in a schematic sectional view. Fig. 4 shows a multi-part cable box (1) with cover plates (11), three side walls (12) and connecting lugs (13), in which the cover plates are stiffened against bending by the fire protection compounds (4) in the form of relatively rigid packages for the secure application of masonry mortar or fresh concrete, are provided with a through hole (120) for the passage of a raised floor support (3) for the transmission of vertical loads or forces from the raised floor panels (2) to the subfloor, and are partially designed by holes or punched out sections (120) in the cover plate (11) to create a secured bond joint between the applied mortar and the cover plate, in a schematic sectional view. Fig. 5 shows a multi-part cable box (1) as in Fig. 4, wherein the edges of the holes or punched-out portions (120) are partially deformed toward the fire protection compound (4) and thereby define, among other things, the distance between the cover plate (11) and the fire protection compound (4), in a schematic sectional view. Fig. 6 shows a multi-part cable box (1) as in Fig. 4, wherein the edges of the holes or punched-out portions (120) are partially deformed toward the upper side of the cover sheet (11) and wherein a fiber layer (14) is partially arranged as a composite intermediate layer (14) between the cover sheet (11) and the fire protection compounds (4), in a schematic sectional view. Fig. 7 shows a cable box (1) as in Fig. 3, in which the upper side of the cover sheet is designed with holes (120) for the secure application of masonry mortar or fresh concrete to improve bonding or for the passage of supports, and a fiber layer (14) is arranged as a composite intermediate layer (14) between the cover sheet (11) and the fire protection compounds (4), in a schematic sectional view. Fig. 8 shows a cable box (1) enclosed on four sides with a cover plate (11) and fire protection compounds (4), in which a raised floor support (3) is supported with its support base on the inside of the cable box and the support shaft (3) is guided through the cover plate (11) and the perforated fire protection compounds, in a schematic sectional view. Fig. 9 shows a four-sided cable box (1) with cover plates (11) at the top and bottom and fire protection compounds (4), in which a raised floor support (3) is mounted outside the cable box and the shaft (3) of the support is pushed through both cover plates and the fire protection compounds, in a schematic sectional view. Fig. 10 shows a three-sided cable box (1) with differently designed pre-punched holes (120) in the cover plate (11), wherein the holes are designed for their function as drilling points, for improving the bond between mortar applied on site and the cover plate or for the passage of raised floor supports, in a schematic view of the cover plate.

[0032] It has been shown that it is possible to dispense with the construction of statically load-bearing threshold lintels to bridge cable-carrying raised floor cavities under doors if the partition construction or cable box itself is designed to transfer vertical loads, if raised floor supports are arranged through the cover sheet and fire protection compounds of the cable box and / or if the sheet metal construction of the cable box is given a usable load-bearing capacity in a statically effective composite effect with the surrounding fire protection wall or with the masonry mortar or any concrete casting compounds.

[0033] If the cable box is already permanently installed in a wall gap and can be supported laterally against bricks, it is usual or necessary for drilling a hole in a thin sheet to use support or underlay to prevent the sheet from deflecting or sagging when the drill is pressed down. In an advantageous embodiment of the invention, it is therefore proposed to install the cover plate (11) of the cable box (1) in the wall gap with a pre-bend upwards in order to prevent the top of the cable box from sagging when the drill is pressed down. A pre-bend of at least the cover plate, approximately in a (circular) arc shape, as in Fig. 3, this advantageously allows for support-free drilling of the hole in the relatively flexible top of the cable box. The pre-bend of the cover plate can also be achieved, for example, by permanently installing a raised floor support.

[0034] In the case of a (spherically) curved and relatively smooth cover plate, a top side of the cable box that is pre-bent upwards against the mortar of the subsequent masonry or against the poured concrete advantageously provides statically effective inherent stability against deflection of the cover plate from the dead weight of the masonry mortar or the concrete fill, similar to the vault effect of an arched bridge.

[0035] During fire tests or in the event of a fire, the proposed pre-bending of the cover sheet against the mortar has the beneficial effect of impeding or preventing thermal expansion of the sheet, resulting in additional contact pressure between the top of the cable box and the surrounding masonry. This prevents the sheet from detaching from the mortar or, with the mortar, from the masonry, thus creating cracks or gaps between the cable box and the masonry, and thus gas leaks in the penetration seal.

[0036] Advantageously, holes (120) are arranged in the cover sheet, which create a positive connection between freshly applied mortar on site and the sheet edges of the holes in the area of ​​the mortar joint. The subsequently hardened mortar thus engages the cover sheet with slight elevations, cams, or consoles, forming a shear-resistant composite body with it. As a result, the shear-resistant plate or beam support body already has an advantageously greater flexural capacity or flexural rigidity than the sum of the individual load-bearing capacities or flexural rigidities of the brittle mortar joint and the thin and very flexible sheet in a loose or non-shear-resistant layer arrangement.Thus, a door threshold with a structurally improved load-bearing capacity compared to a known prefabricated cable box construction can be advantageously formed under a door opening by in situ production of a solid shear bond between the top side of a proposed cable box and a mortar layer applied thereon.

[0037] Alternatively, it is also advantageous to first apply a thin layer of fresh mortar to the cover sheet in such a way that the fresh mortar can at least partially flow through holes in the sheet between the sheet and the fire protection compounds. After the mortar has hardened, an intimate shear or shear bond is created between the sheet and the mortar, thus achieving an overall flexural structure with advantageously high flexural rigidity. Advantageously, a large number of holes or recesses are arranged in the desired bonding area between the cable box and the mortar joint in order to ensure the most even distribution of the bonding and shear forces between the sheet and the mortar and thus a reliably safe flexural load-bearing capacity of the cable box side wall.

[0038] For a flexible on-site arrangement of the cable box and raised floor supports, it is proposed that the through holes (120) in the top side of the cable box be drilled on-site using means known in principle. For known raised floor supports, the diameter of the drill holes is then approximately up to 30 mm, preferably 23 to 25 mm. However, with known sheet metal constructions, finding a suitable drilling point for the force-fitting application of the drill is particularly difficult. It is therefore proposed that, during the manufacture of the cable box, a large number of recesses, slots, incisions, or small holes be arranged in these holes, in which known drilling tools, for example step drills, can find a suitable cutting engagement for circular drilling of a slot or widening of a hole.

[0039] To facilitate the subsequent installation of raised floor supports, it is recommended that holes or similar cutouts be made during the cable box's manufacture, at least in the cover plate of the cable box's top side, with dimensions that match the support posts. Pre-punched round holes or partial recesses or cutouts in the sheet metal then allow for easier drilling of the fire protection compounds that may be arranged or attached to the underside of the cover plate. Such holes or cutouts can also be advantageously arranged in larger numbers across one or more sections of the cable box's top side.

[0040] To effectively create a fire protection barrier, it is recommended to first install a prefabricated fire barrier structure at the intended position in the wall opening and, if necessary, to secure it using known on-site means or to secure its position. If necessary, holes for the installation of known raised floor supports can then be drilled into the prefabricated fire barrier structure using temporary on-site support or hole sealing elements, or pre-drilled or punched holes can be widened accordingly. In accordance with the proposed manufacturing method or arrangement, one or more raised floor supports are arranged in the fireproofing structure without passing the raised floor supports through holes in the prefabricated fireproofing structure. This advantageously allows the proposed fireproofing structure to transfer only a portion of the vertical loads via the frame or folded-plate construction and a second portion of the vertical loads via an indirect or direct force-fit coupling of the raised floor supports between the supporting structure of the system floor or the raised floor panels and the subfloor. After arranging one or more raised floor supports in the fireproofing, the remaining wall opening can be closed using generally known structural means or materials and sealed against the penetration of fire gases.

[0041] In an advantageous embodiment of the proposed sealing or cable box, pre-punched holes or recesses are arranged at specific intervals or in regular patterns at least in the cover plate of the cable box. On the one hand, this allows for a larger selection of one or more holes to be prepared for raised floor supports. On the other hand, a large number of perforated edges and similar angular irregularities in the cover plate advantageously improve the adhesion and form of the cable box's upper surface with the mortar or concrete of the sealing construction created on site.

[0042] A relatively reliable, secured bond joint between the top of the cable box and the surrounding masonry mortar or concrete is created when flowable components of the mortar or concrete penetrate between the cover sheet and the fire protection compounds through a large number of recesses or holes in the sheet metal, thus forming at least rudimentary undercuts or partial bonding behind the hole edges. Even if this does not result in a demonstrable tensile bond between the cover sheet and the mortar or concrete, it at least improves the bond or shear strength, thus preventing relative deformation between the sheet metal and the mortar due to temperature differences in the event of a fire. This works even better the more extensively and evenly the thermal stresses can be distributed across a large number of holes and hole edges.It is therefore proposed to arrange a large number of holes or hole edges in a dense arrangement or in corresponding regular patterns in the cover plate of the cable box.

[0043] It is also proposed that the holes or cutouts be arranged and dimensioned in such a way that, in the event of a local gap forming between the cover sheet and the surrounding mortar or concrete, the fire protection compounds arranged or fixed on the underside of the cover sheet can close an open gap through the holes or cutouts by means of their thermally activated volume expansion against the permeability of fire gases.

[0044] In the event that, as an alternative to the disadvantageous gap opening, a demonstrable tensile bond strength between the cable box top and the mortar or concrete is desired, it is proposed to place a fabric or fiber layer (14), such as felt or fleece, between the cover sheet (11) and the fire protection compound (4). The flowing components of the mortar or concrete then bond positively and force-fit to the fiber layer through the holes or recesses, thereby preventing subsequent detachment or lifting of the sheet from the hardened mortar or concrete.

[0045] The arrangement of a fiber layer between the fire protection compound and the cover sheet also advantageously allows for the pre-drilling or pre-punching of holes in the fire protection compound. It is then very easy on site to prepare the cable box for the installation of raised floor supports simply by cutting out holes in the fiber layer. For this purpose, the holes in the sheet can either be already circularly punched, or the arrangement and design of the punches allows the raised floor supports, which are usually two-part and screwable, to be inserted precisely by bending or easily removing sheet metal parts from the top of the cable box. It goes without saying that the fiber layer is sufficiently impermeable to filter the flowing particles; this means that flowing particles of concrete or mortar can penetrate the fiber layer but cannot penetrate it excessively.

[0046] The shear strength, or the mobilizable shear resistance, between the cover plate and the mortar or concrete can also be increased by increasing the effective hole bearing of the punched holes, for example, by appropriately shaping the hole edges. This can be easily achieved using conventional punching tools. Depending on the direction of the punching, either metal tabs or "gills" engage positively and force-fittingly with the mortar or concrete subsequently applied on site, or the mortar or concrete forms correspondingly form-fitting brackets. Both increase the reliability of the bond between the cover plate of the cable box and the on-site structural construction of the penetration seal.

[0047] The proposed penetration seal makes it possible, particularly in low-height system floors, to install large quantities of pipes and cables in doorways between fire protection compartments, or to easily retrofit the seal later. At the same time, the penetration seal can be installed at any point below a doorway or in a wall opening, regardless of the grid arrangement of the raised floor supports or the stresses of large point loads.

Claims

[1] Fire protection cable penetration seal (1) for installation in a wall opening between two structural fire protection sections in a building, in particular for installation in a wall opening in a system floor between the unfinished floor and raised floor panels, wherein the fire protection cable penetration seal (1) comprises a one-piece sheet metal construction with at least one side wall (12) and a cover sheet (11), whereby the sheet metal construction spans a space for accommodating or passing through cables or lines, and wherein a first section of the cover plate directed away from the room is designed for a material-locking or form-locking connection with masonry mortar or fresh concrete, and wherein at least a second section of the cover plate facing the room is provided with fire protection compounds, and wherein at least the sheet metal construction is designed to transmit a first part of vertical loads and / or vertical forces, characterized bythat the fire protection cable penetration seal (1) comprises a raised floor support (3), wherein the raised floor support (3) is designed to transmit a second part of the vertical loads and / or the vertical forces by means of the raised floor support (3). [2] Fire protection cable seal (1) according to claim 1, characterized by that the first section of the cover plate (11) is convexly curved or arched. [3] Fire protection cable seal (1) according to at least one of the preceding claims, characterized by that the cover plate (11) is provided with a plurality of holes (120) or recesses, wherein the holes (120) or the recesses can be widened to allow the raised floor support (3) to pass through the cover plate (11). [4] Fire protection cable seal (1) according to claim 3, characterized bythat the holes (120) or the recesses are designed or arranged in a plurality to form a statically effective shear bond between the cover plate (11) and the masonry mortar arranged on the first section or the fresh concrete arranged on the first section. [5] Fire protection cable seal (1) according to claim 3 or 4, characterized by that the edges of the holes (120) or the recesses are designed to form a statically effective shear bond between the cover plate (11) and the masonry mortar arranged on the first section or the fresh concrete arranged on the first section. [6] Fire protection cable seal (1) according to at least one of the two preceding claims, characterized bythat the fire protection compounds (4) are designed to be intumescent, wherein the holes (120) or the recesses in the cover plate (11) are arranged and dimensioned such that an open gap between the cover plate (11) and the masonry mortar arranged on the first section can be sealed against the permeability of fire gases when the fire protection compounds (4) are heated by means of the fire protection compounds (4) spreading through the holes (120) or the punched-out portions. [7] Fire protection cable seal (1) according to one of claims 3 to 6, characterized by that the holes (120) or the recesses in the cover plate (11) and further holes (120) or recesses in the fire protection compounds (4) are arranged and designed in such a way that the raised floor support (3) can be passed through the cover plate (11) and the fire protection compounds (4). [8] Fire protection cable seal according to at least one of claims 3 to 7, characterized bythat the holes (120) in the cover plate (11) for passing through the raised floor support (3) are punched out in a circular manner or that the raised floor support (3) can be passed through at least the cover plate (11) after bending or removing sheet metal parts from the cover plate (11). [9] System comprising a fire protection cable penetration seal (1) according to at least one of claims 3 to 8 and the masonry mortar arranged on the first section of the cover plate (11) or the fresh concrete arranged on the first section of the cover plate (11), characterized by that a fabric or fiber layer (14) is arranged between the cover sheet (11) and the fire protection compounds (4) in such a way that flowing components of the masonry mortar or the fresh concrete are positively and force-fittingly connected to the fabric or fiber layer (14) through the holes (120) or recesses. [10] A method for installing a fire protection cable penetration seal according to any one of claims 1 to 8 in a wall opening between the structural fire protection sections in the building, in particular for installation in the wall opening in the system floor between the unfinished floor and the raised floor panels, wherein the space is delimited by the sheet metal construction and a section of a wall, wherein the wall encloses the wall opening, the method comprising the following steps: - Inserting the fire protection cable penetration seal (1) into the wall opening, in particular into the component opening in the system floor between the subfloor and the raised floor panels; - Production of the material-locking or form-locking connection with the masonry mortar or the fresh concrete or - arrangement of the raised floor support (3) within the room; - Creation of a fire-gas-impermeable sealing structure in the wall or component opening. [11] Method according to the preceding claim, characterized by that the raised floor support is passed through one of the holes (120) or through one of the recesses. [12] Arrangement for a fire protection cable partition according to one of claims 1 to 8 in a wall opening between two structural fire protection sections in a building, in particular in the region of a wall opening in the system floor between the raw floor and the raised floor panels, the arrangement comprising at least: - at least one fire protection cable seal according to one of claims 1 to 8 in the component opening in the system floor between the raw floor and the raised floor panels, wherein the construction of the fire protection cable seal spans a space for receiving or passing through cables or lines, - at least one raised floor support in the component opening in the system floor between the subfloor and the raised floor panels, wherein the raised floor support is suitably arranged and designed for the indirect or direct transmission of forces between the system or raised floor and the subfloor; - and a structural sealing construction made of fire protection materials, wherein the sealing construction comprises the construction of the at least one fire protection cable penetration seal and the at least one raised floor support and a remaining wall or component opening, and wherein the sealing construction is suitably designed to prevent fire gas permeability within the boundary surfaces of the wall or component opening.

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