Fire protected building structures and methods for fire protecting building structures

Abstract

A building structure includes a mineral fibrous sheet material having a Temperature Index measured according to ISO 4589-3:2017 of 400° C. or higher, wherein the sheet material has a thickness of at most 1 mm, and wherein mineral fibers forming the sheet material are coated with a coating adapted for retarding fire.

Claims

1-16. (canceled)

17. A method for establishing a facade for a building, said method comprising: lining the outer face of a building wall (210) with a mineral fibrous sheet material (220); fastening brackets (230) to said outer face of said building wall (210); and mounting a facade cladding (240) to said brackets (230); wherein said brackets (230) are mounted such that a cavity (250) is formed between said building wall (210) and facade cladding (240); wherein said mineral fibrous sheet material (220) has a Temperature Index measured according to ISO 4589-3:2017 of 400° C. or higher, wherein said sheet material (220) has a thickness of at most 1 mm, and wherein mineral fibers forming said sheet material (220) is coated with a coating adapted for retarding fire.

18. The method according to claim 17, wherein said first type of mineral fibrous sheet material (220) has a Limiting Oxygen Index measured according to ISO 4589-3:2017 of 90% or higher.

19. The method according to claim 17, wherein said sheet material (220) has a mass per unit area of 100-500 gram per square meter according to ISO 2286-2:2016.

20. The method according to claim 17, wherein said sheet material (220) has a thickness of within the range of 0.1-0.5 mm.

21. The method according to claim 17, wherein said sheet material (220) is coated with a coating comprising a nonorganic fire-resistant filler.

22. The method according to claim 17, wherein said sheet material (220) has a Temperature Index measured according to ISO 4589-3:2017 above 1100° C.

23. The method according to claim 17, wherein the facade is for a multifloored building, and wherein said cavity (250) is blocked between two neighboring floors by an object (260) covered by mineral fibrous sheet material (220) having a Temperature Index measured according to ISO 4589-3:2017 of 400° C. or higher, wherein said sheet material (220) has a thickness of at most 1 mm, and wherein mineral fibers forming said sheet material (220) is coated with a coating adapted for retarding fire.

24. A facade system comprising: a mineral fibrous sheet material (220) adapted for lining the outer face of a building wall (210); a plurality of fastening brackets (230) adapted for being mounted to the outer face of said building wall (210); a facade cladding (240) adapted for being fastened to said fastening brackets (230); wherein when mounted, said brackets 230 secures that a cavity 250 is formed between said building wall (210) and said façade cladding (240) to allow for ventilation; wherein said mineral fibrous sheet material (220) has a Temperature Index measured according to ISO 4589-3:2017 of 400° C. or higher, wherein said sheet material (220) has a thickness of at most 1 mm, and wherein mineral fibers forming said sheet material (220) is coated with a coating adapted for retarding fire.

25. The facade system according to claim 24, wherein said sheet material (220) has a thickness of within the range of 0.1-0.5 mm.

26. The facade system according to claim 24, wherein said sheet material (220) has a mass per unit area of 100-500 gram per square meter measured according to ISO 2286-2:2016.

27. The facade system according to claim 24, wherein said sheet material (220) is coated with a coating comprising a nonorganic fire-resistant filler.

28. The facade system according to claim 24, wherein said sheet material (220) has a Limiting Oxygen Index measured according to ISO 4589-3:2017 of 90% or higher.

29. The facade system according to claim 24, wherein said sheet material (220) has a Temperature Index measured according to ISO 4589-3:2017 above 1100° C.

30. The facade system according to claim 24, wherein the facade system is for a multifloored building, said façade system further comprising: an object (260) adapted for blocking said cavity (250) between two neighboring floors, wherein said object (260) is covered by mineral fibrous sheet material (220) having a Temperature Index measured according to ISO 4589-3:2017 of 400° C. or higher, wherein said sheet material (220) has a thickness of at most 1 mm, and wherein mineral fibers forming said sheet material (220) is coated with a coating adapted for retarding fire.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0041] FIG. 1 is a schematic drawing of a part of a thatched roof in accordance with various embodiments of the invention;

[0042] FIG. 2 is a cross-sectional view of a part of a façade in accordance with various embodiments of the invention; and

[0043] FIG. 3 is a cross-sectional view of a part of a façade of a multifloored building in accordance with various embodiments of the invention.

TABLE-US-00001 References 110 Rafter 120 Roof batten 132 First type underlay 134 Second type underlay 140 Thatch 150 Sway 210 Building wall 220 Sheet material 230 Bracket 240 Façade cladding 250 Cavity 260 Object 270 Floor deck

DETAILED DESCRIPTION OF THE INVENTION

[0044] FIG. 1 shows a part of a thatched roof in accordance with various embodiments of the invention. The thatched roof is partly removed to show the different components. The thatched roof comprises rafters 110 and optionally roof battens 120, depending on the distance between the rafters 110. On top of the rafters 110 and/or roof battens 120 is positioned an underlay. According to the present invention, a specific first type 132 of underlay is used at the side edges, eaves, and ridge of the thatched roof structure. The underlay of a first type 132 is a mineral fibrous sheet material having a Temperature Index measured according to ISO 4589-3:2017 of 400° C. or higher, and has a thickness of at most 1 mm. The mineral fibers forming the sheet material of the underlay of a first type 132 is coated with a coating adapted for retarding fire. The underlay of a first type 132 may form part of the entire underlay, but it is preferred to use a second type 134 of underlay having a good vapor permeability to secure ventilation of the bundles of thatch 140. An example of a second type 134 of underlay may be a woven fiber glass sheet material with a chopped fiberglass sheet attached to its surface (i.e., a combi mat), preferably having a melting point of 800° C. or higher. The bundles of thatch 140 may be held in place by sways 150, which are split, or round rods made of e.g., steel, hazel, or willow. The sways 150 are used with spars, iron crooks or screw fixings (not shown) to secure the bundles of thatch 140 to the rafters 110 and/or roof battens 120.

[0045] FIG. 2 is a cross-sectional view of a part of a façade in accordance with various embodiments of the invention. Here, the façade is established by lining the outer face of a building wall 210 with a mineral fibrous sheet material 220. The mineral fibrous sheet material 220 has a Temperature Index measured according to ISO 4589-3:2017 of 400° C. or higher, and has a thickness of at most 1 mm. The mineral fibers forming the sheet material 220 is coated with a coating adapted for retarding fire. Then brackets 230 are fastened to the outer face of said building wall 210, and a facade cladding 240 is mounted to said brackets 230. The brackets 230 are mounted such that a cavity 250 is formed between the building wall 210 and façade cladding 240 to allow for ventilation. FIG. 3 is a cross-sectional view of a part of a façade of a multifloored building in accordance with various embodiments of the invention. Here, the cavity is blocked between two neighboring floors by an object 260 covered by the before mentioned mineral fibrous sheet material 220.