Fire-resistant building panels

Abstract

The fire-resistant structural building panel which comprises an internal rectangular frame which bordering high density thermally insulating material 10. The frame comprises horizontal frame members 1

Description

15 05 25 Field of the invention This invention relates to fire-resistant panels for use in the construction of buildings. 10 More especially the invention concerns fire-resistant structural panels which in use define sections of internal walls for use in the construction of housing and industrial units. 15 Background to the Invention Structural panels for use in the construction of both residential and commercial buildings are commonplace. 20 Such panels generally include a core of rigid foam insulating material sandwiched between and adhesively bonded or otherwise secured to inner and outer panels of, for example, plasterboard or wood. 25 Structural panels facilitate inter alia a fast-track building process for residential and commercial buildings with potential cost savings for reason that they are relatively lightweight and simple to erect. 30 However, currently available structural panels have limited ability to act as fire barriers, their resistance to the spread of smoke and fire being in many cases less than ten minutes. 15 05 25 Our UK Patent 2603273B discloses a fire-resistant structural panel for residential and commercial buildings having enhanced resistance to the spread of smoke and fire and the present 5 invention concerns fire resistant structural panels having improved features to those disclosed in this earlier patent. More particularly, the present invention sets out to provide fire resistant building panels which have all the advantages of 10 presently available structural panels which define sections of internal partition walls of residential and commercial buildings and which additionally act as effective firebreaks for periods in excess of four hours. 15 Additionally, fire resistant structural panels in accordance with the invention provide enhanced acoustic protection. Statements of the Invention 20 In a preferred aspect, the invention provides a fire-resistant structural building panel which, in use, defines a part of an internal wall of a building and which comprises a rectangular frame which borders a quantity of high density thermally 25 insulating material and includes upper and lower generally horizontal frame members each coated on at least one side with a solution including an intumescent material and each connected to generally vertical side frame members also coated on at least one side with a solution which contains an intumescent material 30 and which includes an internal open-ended channel or conduit which extends downwardly from the upper generally horizontal frame member and is dimensioned to receive cabling connectable to a source of electricity; 15 05 25 said building panel further comprising a plurality of equally dimensioned sheet members each coated on at least one side with a solution which includes an intumescent material and each adhered to its neighbouring sheet or sheet members; 5 each sheet member being secured to said frame members and dimensioned to match the dimensions of the rectangular frame along the horizontal sides and one generally vertical side of the frame but to extend beyond the other vertical side of the frame to define a channel open to receive an additional vertical 10 frame member of width and depth substantially equal to the width and depth respectively of the channel; the arrangement being such that, if damaged, one or each outermost sheet member can be removed from the panel and replaced 15 by a fresh sheet member without significant damage to the surface of the underlying panel. Preferably, each said panel comprises a plurality of equally dimensioned sheet members each coated on at least one side with 20 a solution of intumescent material and adhered to its neighbouring sheet or sheets, whereby if damaged, one or each outermost sheet member of said panel can be removed from the panel and replaced by a fresh sheet member. 25 Preferably, each panel comprises three or more equally dimensioned sheets each coated on at least one side with a solution including an intumescent material. A preferred intumescent containing solution is HW01 as supplied 30 by the Applicant. Each external panel preferably comprises an inner sheet of oriented strand board (OSB) and two sheets of plasterboard. 15 05 25 Typically, the thickness of the panels is between 10 and 12mm; a preferred thickness is 11mm. Each of the other sheets of the panel preferably comprise 5 plasterboard of thickness between 10mm and 14mm, preferably 12.5mm. The total thickness of the panel is preferably between 120mm and 140mm, preferably 132mm. An additional side frame member may be provided for attachment 10 to said one vertical side frame member for selective location within said channel. Brief description of the Drawings 15 The invention will now be described by way of example only with reference to the accompanying drawings in which:- Figure 1 is a side view of a fire-resistant building panel in 20 accordance with the invention with one external facing sheet removed to show internal features of the panel; Figure 2 is an end view from above of the panel shown in Figure 1 to an enlarged scale; 25 Figure 3 is an end view of adjoining end portions of panels in accordance with the invention which together form sections of an internal wall of a building; 30 Figure 4 illustrates adjoining end portions of panels in accordance with the invention which together define a corner section of internal walls of a building; and 15 05 25 Figure 5 is a side view in section to an enlarged scale of a central part of a panel in accordance with the invention. 5 Detailed Description of the Invention The structural fire-resistant building panel illustrated in the drawings is intended for use in new and existing buildings to define, in concert with other identical or similar panels, the 10 internal walls and ceilings of rooms and spaces within such buildings . The illustrated building panel comprises a rectangular timber frame 10 which borders a sheet or sheets 12 of a high density 15 thermally insulating material such as that known as rock-wall insulation. Typically, the thickness of the insulating material is between 30 and 60mm (preferably 40mm) . The frame 10 comprises upper and lower horizontal elongate timber side members 14a, 14b each coated with a solution which includes an intumescent 20 material, and vertical elongate timber side frame members 16a, 16b also coated with a solution which contains an intumescent material. A suitable coating is the intumescent coating HW01 supplied by 25 the Applicant. Typically, the overall dimension of the frame is 1220mm by 2440mm. 30 As will be seen from Figure 2, the front and rear sides of the panel are covered by panel sheets 18a, 18b each secured to the frame 10 by any conventional means. In use, the panel sheet 18a is positioned on the external face of the panel and the sheet 18b on the internal face of the panel. As will be seen from Figure 5 open-ended channel 11 which end of the frame 10. This 1, the panel includes an internal extends downwardly from the upper channel is dimensioned to receive cabling connected to a source of electricity. The illustrated panel is essentially for use in ground floors 10 of buildings. For floors above ground level, the channel will preferably extend over the entire height of the panel and communicate with an equivalent channel 11 of a ground floor panel. 15 05 25 15 As will be seen more clearly from Figures 2, the side frame member 16a is spaced inwardly from the adjacent side edges of the panel sheets 18a, 18b to define an open sided channel 20 whose length is equal to the length of an additional side member 22 and whose cross section is marginally greater than that of 20 the side member 22 to assist insertion of the side member 22 into the channel 20 when required. As illustrated in Figure 3 of the drawings, the side member 22, in use, is attached to the exposed side surface of the frame 25 member 16b to define a lengthwise extending extension which, when required, defines a close fit within the channel 20 of an adjoining panel. In this way the panels can readily be joined one to each other to define an internal wall or ceiling of a building. 30 Screws 24 are provided to secure the to secure the side member 22 within the channel 20. As will be seen from Figure 4, the additional side member 22 can also be positioned within the open side of a panel to close the channel 20 when securing adjoining panels to define a rectangular reinforced corner of a room or space. 5 Turning now to Figure 5 of the drawings, each panel sheet 18a, 18b comprises an inner lining comprising an OSB panel 26 and two or more super-imposed cover sheets 28 of, for example, plaster board. The panel 26 and cover sheets 28 are secured one to 10 another by a suitable adhesive which preferably includes an intumescent material. As will be seen from Figure 1, the panel 10 includes an internal open-ended channel 11 which extends downwardly from the upper 15 end of the frame 10. This channel is dimensional to receive cabling connected to a source of electricity. The panel illustrated is essentially for use in ground floors of buildings. For floors above ground level, the channel will 20 extend over the entire height of the panel. 15 05 25 The intumescent content of the described building panels enables the panels to act as fire breaks for periods in excess of four hours, a period of time normally sufficient to locate and 25 extinguish a fire. Once a fire has been extinguished, the exposed sheets 28 of any fire affected panels can be readily removed and if required, replaced with a fresh panel or panels. It will be appreciated that the foregoing is merely exemplary 30 of fire-resistant panels in accordance with the invention and that modifications can readily be made thereto without departing from the true scope of the invention as set out in the appended claims .

Claims

15 05 25CLAIMS 1. A fire-resistant structural building panel which, in use, 5 defines a part of an internal wall of a building and which comprises a rectangular frame which borders a quantity of high density thermally insulating material and includes upper and lower generally horizontal frame members each coated on at least one side with a solution including an 10 intumescent material and each connected to generally vertical side frame members also coated on at least one side with a solution which contains an intumescent material and which includes an internal open-ended channel or conduit which extends downwardly from the upper generally 15 horizontal frame member and is dimensioned to receive cabling connectable to a source of electricity; said building panel further comprising a plurality of equally dimensioned sheet members each coated on at least one side with a solution which includes an intumescent 20 material and each adhered to its neighbouring sheet or sheet members; each sheet member being secured to said frame members and dimensioned to match the dimensions of the rectangular frame along the horizontal sides and one generally vertical 25 side of the frame but to extend beyond the other vertical side of the frame to define a channel open to receive an additional vertical frame member of width and depth substantially equal to the width and depth respectively of the channel; 30 the arrangement being such that, if damaged, one or each outermost sheet member can be removed from the panel and replaced by a fresh sheet member without significant damage to the surface of the underlying panel.15 05 252. A building panel as claimed in claim 1 wherein each sheet member comprises an inner sheet of oriented strand board (OSB) and at least two sheets of plasterboard.5 3. A building panel as claimed in any one of the precedingclaims wherein the thickness of each sheet member is between 10 and 12mm.

4. A building panel as claimed in claim 1 wherein said internal 10 open-ended channel extends along the full height of thepanel.

5. A building panel as claimed in any one of the proceeding claims wherein an additional side frame member is provided 15 for attachment to one said vertical side frame member forselective location within said channel.20

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