A fire rated glass flooring system comprising a first layer of glass which is a structural glass and a second layer of glass which is a fire rated glass, together with a structural frame supporting the flooring system, wherein the two layers of glass are positioned one above the other and are separa
A fire rated glass flooring system comprising a first layer of glass which is a structural glass and a second layer of glass which is a fire rated glass, together with a structural frame supporting the flooring system, wherein the two layers of glass are positioned one above the other and are separated by at least one load transferring means. The flooring system is more aesthetic than conventional frames as the user of a load transferring means allows the first and second layers of glass to be brought closer together and hence the structural frame supporting the system is less visible through the system.
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The invention claimed is: 1. A fire rated glass flooring system comprising: a first layer of glass which comprises a structural glass; a second layer of glass which comprises a fire rated glass, wherein the first layer of glass is positioned above the second layer of glass; one or more load transfe
The invention claimed is: 1. A fire rated glass flooring system comprising: a first layer of glass which comprises a structural glass; a second layer of glass which comprises a fire rated glass, wherein the first layer of glass is positioned above the second layer of glass; one or more load transferring means; and a structural frame comprising a plurality of beams and a plurality of cross members interconnecting the beams, wherein the structural frame supports the first and second layers of glass and the one or more load transferring means; characterized in that the two layers of glass are separated by one or more of the load transferring means, and at least one of the load transferring means comprises a horizontal portion supporting the first layer of glass above and a vertical portion transferring load from the first layer of glass above directly to the structural frame below, bypassing the second layer of glass. 2. A fire rated glass flooring system as claimed in claim 1 wherein the distance from the upper surface of the second layer of glass to the lower surface of the first layer of glass is less than 50 mm. 3. A fire rated glass flooring system as claimed in claim 1 wherein the structural glass is multi-laminated glass sheet made up of layers of float glass, heat strengthened glass and fully toughened glass bonded together using poly vinyl butyril or a resin. 4. A fire rated glass flooring system as claimed in claim 1 wherein the fire rated glass is selected from sgg CONTRAFLAM®-N2 39 mm thick, sgg CONTRAFLAM® LITE 17 mm thick and sgg CONTRAFLAM® EI30 21 mm or 17 mm thick. 5. A fire rated glass flooring system as claimed in claim 1 wherein the second layer of glass is supported directly by the structural frame. 6. A fire rated glass flooring system as claimed in claim 1 wherein the horizontal portion of the load transferring means in use extends parallel to and between the first and second layers of glass. 7. A fire rated glass flooring system as claimed in claim 1 wherein the vertical portion of the load transferring means in use extends upwardly from the structural frame. 8. A fire rated glass flooring system as claimed in claim 1 wherein the horizontal portion of the load transferring means is perpendicular to and is in load transferring contact with the vertical portion of the load transferring means. 9. A fire rated glass flooring system as claimed in claim 1 wherein the horizontal portion of the load transferring means is received in a corresponding slot in the vertical portion of the load transferring means. 10. A fire rated glass flooring system as claimed in claim 9 wherein the slot is vertical and elongate to allow for adjustment of the height of the first portion. 11. A fire rated glass flooring system as claimed in claim 1 wherein the horizontal portion of the load transferring means is a portion of a glazing bar. 12. A fire rated glass flooring system as claimed in any one of claims 1 to 11 wherein the vertical portion of the load transferring means is one or more metal strips extending upwardly from the structural frame along the length thereof. 13. A fire rated glass flooring system as claimed in claim 1 wherein the or each load transferring means is located on the structural frame and is of size and shape such that the first layer of glass is supported by the or each load transferring means. 14. A fire rated glass flooring system as claimed in claim 13 wherein the or each load transferring means is a box shape. 15. A fire rated glass flooring system as claimed in claim 13 wherein the or each load transferring means is selected from a solid steel box and a hollow steel box. 16. A fire rated glass flooring system as claimed in claim 13 wherein the second layer of glass is supported by the structural frame, leaving a small gap between the first and second layers of glass. 17. A fire rated glass flooring system as claimed in claim 16 wherein a weighting means is provided above the second layer of glass. 18. A fire rated glass flooring system as claimed in claim 17 wherein the weighting means is above both the second layer of glass and the load transferring means. 19. A fire rated glass flooring system as claimed in claim 17 wherein the weighting means extends over the width of the load transferring means. 20. A fire rated glass flooring system as claimed in claim 17 wherein the weighting means is a plate. 21. A fire rated glass flooring system as claimed in claim 13 wherein the second layer of glass is suspended from the first layer of glass such that there is a small gap between the first and second layers of glass. 22. A fire rated glass flooring system as claimed in claim 21 wherein the or each load transferring means is a hollow steel box. 23. A fire rated glass flooring system as claimed in claim 21 wherein the second layer of glass is suspended from the first layer of glass by means of a glazing bar and structural silicone. 24. A fire rated glass flooring system comprising a first layer of glass which is a structural glass and a second layer of glass which is a fire rated glass, together with a structural frame supporting the flooring system, wherein the two layers of glass are positioned one above the other, characterized in that the two layers of glass are separated by one or more load transferring means and the load transferring means transfers load applied to the first layer of glass directly to the structural frame, bypassing the second layer of glass, and wherein the or each load transferring means together with the structural frame form a C shape having an upper horizontal section, a lower horizontal section and a connecting vertical section, with the first layer of glass being supported by the or each load transferring means and the second layer of glass being supported by the structural frame. 25. A fire rated glass flooring system as claimed in claim 24 wherein the load transferring means comprises a first portion for bearing the load applied to the first layer of glass and a second portion for transmitting the load applied to the first layer of glass to the structural frame. 26. A fire rated glass flooring system as claimed in claim 24 wherein the lower horizontal section of the C shape is formed by the structural frame, the upper horizontal section of the C shape is formed by some or all of the load transferring means and in use the upper horizontal section of the C shape is between the first and second layers of glass. 27. A fire rated glass flooring system as claimed in claim 25 wherein the second portion is integral with the structural frame. 28. A fire rated glass flooring system as claimed in claim 25 wherein the first portion is integral with the second portion, is attached directly to the second portion or is attached indirectly to the second portion via a connecting means. 29. A fire rated glass flooring system as claimed in claim 28 wherein the first portion is attached to the second portion by a connecting means. 30. A fire rated glass flooring system as claimed in claim 29 wherein the connecting means is a plate. 31. A fire rated glass flooring system as claimed in claim 25 wherein the first portion is a box shape. 32. A fire rated glass flooring system comprising: a first layer of glass which comprises structural glass, a second layer of glass which comprises fire rated glass, one or more load transferring means, and a structural frame supporting the flooring system comprising a plurality of beams and a plurality of cross members interconnecting the beams; wherein the first layer which comprises structural glass is positioned above the second layer which comprises fire rated glass and the distance from the upper surface of the second layer of glass to the lower surface of the first layer of glass is less than 50 mm; characterized in that the two layers of glass are separated by one or more of the load transferring means, and the or each load transferring means: comprises a box shape selected from a solid steel box and a hollow steel box, is located on the structural frame, and is of size and shape such that the first layer of glass is supported by the or each load transferring means, and wherein the second layer of glass is supported by the structural frame leaving a small gap between the first and second layers of glass. 33. A fire rated glass flooring system comprising: a first layer of glass which comprises a structural glass, a second layer of glass which comprises a fire rated glass, one or more load transferring means, and a structural frame supporting the flooring system comprising a plurality of beams and a plurality of cross members interconnecting the beams; wherein the first layer which comprises structural glass is positioned above the second layer which comprises fire rated glass, the distance from the upper surface of the second layer of glass to the lower surface of the first layer of glass is less than 50 mm, and the second layer of glass is supported by the structural frame, leaving a small gap between the first and second layers of glass, characterized in that the two layers of glass are separated by one or more of the load transferring means, and at least one of the load transferring means comprises a horizontal portion supporting the first layer of glass above and a vertical portion transferring load from the first layer of glass above directly to the structural frame below, bypassing the second layer of glass; wherein the or each load transferring means is located on the structural frame, is selected from a solid steel box and a hollow steel box, and is of size and shape such that the first layer of glass is supported by the or each load transferring means, and wherein a weighting means which is a plate is provided above the second layer of glass and extends over the width of at least one of the load transferring means. 34. A fire rated glass flooring system comprising: a first layer of glass which is a structural glass, a second layer of glass which is a fire rated glass, and one or more load transferring means, together with a structural frame supporting the flooring system comprising a plurality of beams and a plurality of cross members interconnecting the beams; wherein the first layer which comprises structural glass is positioned above the second layer which comprises fire rated glass, the second layer of glass is suspended from the first layer of glass by means of a glazing bar and structural silicone, leaving a small gap between the first and second layers of glass, and the distance from the upper surface of the second layer of glass to the lower surface of the first layer of glass is less than 50 mm, characterized in that: the two layers of glass are separated by one or more of the load transferring means, and at least one of the load transferring means comprises a horizontal portion supporting the first layer of glass above, and a vertical portion transferring load from the first layer of glass above directly to the structural frame below, bypassing the second layer of glass; wherein the or each load transferring means is a hollow steel box located on the structural frame and is of size and shape such that the first layer of glass is supported by the or each load transferring means. 35. A fire rated glass flooring system comprising a first layer of glass which is a structural glass and a second layer of glass which is a fire rated glass, together with a structural frame supporting the flooring system, wherein the first layer which comprises structural glass is positioned above the second layer which comprises fire rated glass, the second layer of glass is suspended from the first layer of glass by means of a glazing bar and structural silicone such that there is a small gap between the first and second layers of glass, and the distance from the upper surface of the second layer of glass to the lower surface of the first layer of glass is less than 50 mm, characterized in that the two layers of glass are separated by one or more load transferring means, wherein the or each load transferring means is a hollow steel box and together with the structural frame forms a C shape having an upper horizontal section, a lower horizontal section and a connecting vertical section, with the first layer of glass being supported by the or each load transferring means and the second layer of glass being supported by the structural frame.
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