{"product_id":"byson-door-louver-grilles-steel-fire-rated-ul-its-whi","title":"Byson Door Louver Grilles, Steel - Fire Rated (UL, ITS, WHI)","description":"\u003cdiv\u003e\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cp class=\"text-weight-bold\"\u003e\u003cem\u003eMade in the USA!\u003c\/em\u003e\u003cstrong\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"text-weight-bold\"\u003e\u003cstrong\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eProduct \u003c\/span\u003eDescription\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eFor 1 3\/4 in (44.5 mm) doors\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eRecommended for steel and composite fire doors up to 1 ½ hour rating or in existing door cut-outs\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eZ-blades riveted to operating bar and frame at 1 in (25.4 mm) intervals in welded 1 9\/16 in (39.6 mm) deep frame\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eMechanical stop holds blades open\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eBlades are operated by a manual adjusting lever\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eMitered frame with welded corners: screws fasten through frame into louver core leaving corridor side of frame free of fasteners\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSpring-loaded fusible link mechanism activated at 165°F, upon melting of the link, action bar is actuated, closing and locking all blades\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e18-gauge cold rolled steel frame and 16-gauge cold rolled steel adjustable blades pivot on cadmium-plated steel rivets\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eCustom sizing available. Min. cut-out size 10 in (254 mm) x 6 in (152.4 mm), max. cut-out size 24 in (609.6 mm) x 24 in (609.6 mm)\u003c\/li\u003e\n\u003cli class=\"p2\"\u003e45% free area for optimal airflow\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eOptions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eFinish\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eStandard Mineral Bronze powder coat\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSpecial order colors: AMS Beige, SC Beige, Sand, Brass, Black, Flat Black, Gray, Silver, White\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eAdd-on Zinc plating available with above finishes, for corrosion resistance and exterior use\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eScreen\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eStandard no screen\u003c\/li\u003e\n\u003cli class=\"p2\"\u003eNylon insect screen and aluminum bird screen available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFire Rating\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eWith UL and ITS classification marks\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eTested \u0026amp; Listed for UL10C, and classified in accordance with UBC7-2-94, ASTM E152, CAN\/ULC S104, NFPA 252. Install in accordance with NFPA80\u003c\/li\u003e\n\u003cli class=\"p2\"\u003eThis model is U.L. and WHI listed for use in fire doors up to 1 1\/2 hour rating. Louver size shall not exceed maximum of 576 square inches, 24 in (610 mm) width and 24 in (610 mm) height. The minimum width and height shall not be less than 10 in (254 mm) and 6 in (153 mm), respectively. Louvers may be provided for classified hollow-metal type and composite type fire doors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eNotes\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"text-weight-bold\"\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eStandard sizes available with 1-2 week production time\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"text-weight-bold\"\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003ePricing is excluding shipping, contact for quotes\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDownloads\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0595\/7782\/7511\/files\/Byson_BYDLSFR_Specification_Sheet.pdf?v=1758829810\" target=\"_blank\"\u003e\u003cspan\u003eSpecification Sheet\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Installation Instructions\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0595\/7782\/7511\/files\/Installation_Instructions.pdf?v=1761251566\"\u003e\u003cspan\u003eInstallation Instructions\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Byson","offers":[{"title":"12 x 12 inches","offer_id":45297941151927,"sku":null,"price":502.0,"currency_code":"USD","in_stock":true},{"title":"18 x 12 inches","offer_id":45297941184695,"sku":null,"price":562.0,"currency_code":"USD","in_stock":true},{"title":"24 x 12 inches","offer_id":45297941217463,"sku":null,"price":621.0,"currency_code":"USD","in_stock":true},{"title":"24 x 18 inches","offer_id":45370109919415,"sku":null,"price":690.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/7782\/7511\/files\/Screenshot2025-09-25at3.10.22PM.png?v=1758829918","url":"https:\/\/bysonproducts.com\/en-intl\/products\/byson-door-louver-grilles-steel-fire-rated-ul-its-whi","provider":"Byson","version":"1.0","type":"link"}