Fire barrier

E - Fixed Constructions – 04 – B

Patent

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Details

E04B 1/94 (2006.01) E04B 1/78 (2006.01)

Patent

CA 2277115

A fire barrier (12) for use in dynamic voids to seal against the spread of fire. Flexible foil-backed insulation material (22) is supported by a woven metallic support screen (18) positioned in the void. As the surfaces (14, 16) defining the void undergo relative movement, the ability of the individual wire elements of the screen (18) to move in a scissor-like fashion relative to one another allows the screen to distort laterally without shearing, wrinkling, or buckling while the insulation material (22) floating thereon is effectively isolated from any shear forces. The foil backing (20, 24) allows the insulation (22) to freely shift relative to the support screen (18).

L'invention concerne un élément coupe-feu (12) qui est destiné à des cavités subissant des contraintes dynamiques et sert à empêcher la propagation du feu. Un matériau d'isolation flexible (22) doublé d'une feuille est supporté par une grille métallique tissée (18) positionnée dans la cavité. Lorsque les surfaces (14, 16) définissant la cavité subissent un mouvement relatif, la capacité des fils métalliques individuels de la grille (18) à se déplacer les uns par rapport aux autres à la manière de ciseaux permet à la grille de subir une déformation latérale sans cisaillement, plissage ou voilement, tandis que le matériau d'isolation (22) flottant sur la grille est efficacement isolé de toute force de cisaillement. Le doublage (20, 24) au moyen d'une feuille permet au matériau isolant (22) de se déplacer librement par rapport à la grille (18).

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