{"id":5601,"date":"2025-08-05T07:20:08","date_gmt":"2025-08-05T07:20:08","guid":{"rendered":"https:\/\/www.jinyupaint.com\/?p=5601"},"modified":"2025-08-05T07:26:25","modified_gmt":"2025-08-05T07:26:25","slug":"how-many-hours-is-a-class-a-fire-rating","status":"publish","type":"post","link":"https:\/\/www.jinyupaint.com\/fr\/how-many-hours-is-a-class-a-fire-rating.html","title":{"rendered":"Combien d'heures correspond un classement au feu de classe A ?"},"content":{"rendered":"<p>Un classement au feu de classe A offre g\u00e9n\u00e9ralement une protection contre l'incendie de 30 \u00e0 120 minutes, ce qui repr\u00e9sente le niveau le plus \u00e9lev\u00e9 de r\u00e9sistance au feu pour les mat\u00e9riaux de construction. Cette dur\u00e9e permet une \u00e9vacuation en toute s\u00e9curit\u00e9 et l'intervention des pompiers. La dur\u00e9e exacte de la protection d\u00e9pend de l'\u00e9paisseur du mat\u00e9riau, de la qualit\u00e9 de l'installation et des facteurs environnementaux.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-introduction\">1. Introduction<\/h2>\n\n\n\n<p>Dans le domaine de la s\u00e9curit\u00e9 de la construction et de la protection contre l'incendie, il est essentiel pour les architectes, les entrepreneurs et les propri\u00e9taires de b\u00e2timents de comprendre la dur\u00e9e du classement au feu de la classe A et les niveaux de r\u00e9sistance au feu. Ce syst\u00e8me de classification permet de s\u00e9lectionner des mat\u00e9riaux capables de r\u00e9sister \u00e0 une chaleur et \u00e0 des flammes intenses dans des assemblages r\u00e9sistants au feu.<\/p>\n\n\n\n<p>Que vous travailliez sur la conception d'un b\u00e2timent ignifuge, que vous r\u00e9pondiez aux exigences du code du b\u00e2timent en mati\u00e8re d'incendie ou que vous s\u00e9lectionniez des mat\u00e9riaux r\u00e9sistants aux flammes, le fait de savoir combien de temps durent les murs et les portes ignifug\u00e9s de classe A et d'autres composants peut sauver des vies et des biens.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-2-what-is-a-class-a-fire-rating\">2. Qu'est-ce qu'un classement au feu de classe A ? <\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-definition-and-testing-standards\">D\u00e9finition et normes d'essai<\/h3>\n\n\n\n<p>La classe A repr\u00e9sente la meilleure performance au feu selon ces normes cl\u00e9s :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ASTM E84<\/strong>\u00a0(M\u00e9thode d'essai normalis\u00e9e pour les caract\u00e9ristiques de combustion en surface)<\/li>\n\n\n\n<li><strong>UL 723<\/strong>\u00a0(Norme pour l'essai des caract\u00e9ristiques de combustion en surface)<\/li>\n\n\n\n<li><strong>NFPA 255<\/strong>\u00a0(M\u00e9thode normalis\u00e9e d'essai des caract\u00e9ristiques de combustion des surfaces)<\/li>\n<\/ul>\n\n\n\n<p>Ils \u00e9valuent deux param\u00e8tres essentiels :<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Indice de propagation de la flamme (FSI) \u2264 25<\/strong>\u00a0- Mesure la vitesse de propagation du feu<\/li>\n\n\n\n<li><strong>Smoke Developed Index (SDI) \u2264 450<\/strong>\u00a0- Quantifie la production de fum\u00e9e<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-fire-rating-classification-comparison-added-table\">Comparaison des classements de r\u00e9sistance au feu (tableau ajout\u00e9)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Classe d'\u00e9valuation<\/th><th>Indice de propagation de la flamme<\/th><th>Indice de d\u00e9veloppement des fum\u00e9es<\/th><th>Temps de protection typique<\/th><th>Applications courantes<\/th><\/tr><\/thead><tbody><tr><td>Classe A<\/td><td>0-25<\/td><td>\u2264450<\/td><td>30-120 minutes<\/td><td>H\u00f4pitaux, sorties, murs porteurs<\/td><\/tr><tr><td>Classe B<\/td><td>26-75<\/td><td>\u2264450<\/td><td>20-60 minutes<\/td><td>Couloirs int\u00e9rieurs, espaces commerciaux<\/td><\/tr><tr><td>Classe C<\/td><td>76-200<\/td><td>\u2264450<\/td><td>10-30 minutes<\/td><td>Structures temporaires, certains int\u00e9rieurs<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-key-properties-of-class-a-materials\">Principales propri\u00e9t\u00e9s des mat\u00e9riaux de classe A<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dur\u00e9e de la r\u00e9sistance au feu<\/strong>: 0,5-2 heures typiquement<\/li>\n\n\n\n<li><strong>Mat\u00e9riaux incombustibles<\/strong>: Souvent \u00e0 base de min\u00e9raux<\/li>\n\n\n\n<li><strong>Tol\u00e9rance aux temp\u00e9ratures \u00e9lev\u00e9es<\/strong>: R\u00e9siste \u00e0 une temp\u00e9rature de 1000\u00b0F+ pendant la p\u00e9riode nominale<\/li>\n\n\n\n<li><strong>Maintien de l'int\u00e9grit\u00e9 structurelle<\/strong>: Pendant toute la dur\u00e9e du classement au feu<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-3-how-long-does-protection-last\">3. Quelle est la dur\u00e9e de la protection ?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-protection-time-by-material-type\">Temps de protection par type de mat\u00e9riau<\/h3>\n\n\n\n<p>Les diff\u00e9rents mat\u00e9riaux de construction ignifug\u00e9s offrent des dur\u00e9es de protection variables :<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Plaques de pl\u00e2tre<\/strong>\u00a0(Type X) : 1 heure par couche de 5\/8\u2033.<\/li>\n\n\n\n<li><strong>Produits ignifuges appliqu\u00e9s par pulv\u00e9risation<\/strong>: 1-3 heures en fonction de l'\u00e9paisseur<\/li>\n\n\n\n<li><strong>Rev\u00eatements intumescents<\/strong>: \u00c9largissement pour offrir une barri\u00e8re de 30 \u00e0 120 minutes<\/li>\n\n\n\n<li><strong>Verre r\u00e9sistant au feu<\/strong>: 45-120 minutes dans des cadres approuv\u00e9s<\/li>\n\n\n\n<li><strong>Assemblages en b\u00e9ton<\/strong>2-4 heures pour les structures \u00e9paisses<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-factors-affecting-fire-rating-duration\">Facteurs affectant la dur\u00e9e du classement au feu<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Epaisseur du mat\u00e9riau<\/strong>: Plus de masse = protection plus longue<\/li>\n\n\n\n<li><strong>Qualit\u00e9 de l'installation<\/strong>: Les lacunes r\u00e9duisent l'efficacit\u00e9<\/li>\n\n\n\n<li><strong>Exposition environnementale<\/strong>: L'humidit\u00e9 et les produits chimiques peuvent d\u00e9grader les performances.<\/li>\n\n\n\n<li><strong>Conception de l'assemblage<\/strong>: Plusieurs composants fonctionnent ensemble<\/li>\n\n\n\n<li><strong>\u00c9tat d'entretien<\/strong>: Les dommages compromettent la notation<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-applications-of-class-a-fire-rated-materials\">4. Applications des mat\u00e9riaux ignifug\u00e9s de classe A<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-critical-infrastructure-needs\">Besoins en infrastructures critiques<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Murs coupe-feu dans les h\u00f4pitaux<\/strong>Les zones de soins : 2 heures minimum pour les zones de soins<\/li>\n\n\n\n<li><strong>Murs coupe-feu<\/strong>\u00a0dans les immeubles de grande hauteur : 1 \u00e0 3 heures<\/li>\n\n\n\n<li><strong>Portes coupe-feu<\/strong>Les cages d'escaliers sont soumises \u00e0 des \u00e9valuations de 90 minutes.<\/li>\n\n\n\n<li><strong>Syst\u00e8mes coupe-feu<\/strong>: Maintenir l'indice de r\u00e9sistance des murs et des planchers au niveau des p\u00e9n\u00e9trations.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-special-hazard-areas\">Zones \u00e0 risques particuliers<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Locaux \u00e9lectriques<\/strong>: Exiger des enceintes d'une dur\u00e9e minimale de 1 heure<\/li>\n\n\n\n<li><strong>Voies d'\u00e9vacuation<\/strong>: Prot\u00e9g\u00e9 par des mat\u00e9riaux de classe A<\/li>\n\n\n\n<li><strong>Volets coupe-feu HVAC<\/strong>: La dur\u00e9e de protection des murs correspond \u00e0 la dur\u00e9e de protection des murs.<\/li>\n\n\n\n<li><strong>Isolation r\u00e9sistante au feu<\/strong>: Dans les greniers et les espaces cach\u00e9s<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-5-selecting-class-a-products\">5. S\u00e9lection des produits de classe A<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-certification-requirements\">Exigences en mati\u00e8re de certification<\/h3>\n\n\n\n<p>Recherchez ces marques lors de la s\u00e9lection&nbsp;<strong>produits de construction ignifug\u00e9s<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Certifi\u00e9 UL<\/strong>\u00a0classement au feu<\/li>\n\n\n\n<li><strong>Intertek Warnock Hersey<\/strong>\u00a0listes<\/li>\n\n\n\n<li><strong>Approuv\u00e9 par FM<\/strong>\u00a0produits<\/li>\n\n\n\n<li><strong>Rapports d'\u00e9valuation de l'ICC-ES<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-cost-vs-performance-considerations\">Consid\u00e9rations relatives au co\u00fbt et \u00e0 la performance<\/h3>\n\n\n\n<p>Tandis que&nbsp;<strong>co\u00fbts de l'ignifugation<\/strong>&nbsp;sont plus \u00e9lev\u00e9s pour les mat\u00e9riaux de la classe A :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R\u00e9duction des primes d'assurance<\/li>\n\n\n\n<li>Diminution des risques de responsabilit\u00e9<\/li>\n\n\n\n<li>Conformit\u00e9 avec\u00a0<strong>codes de s\u00e9curit\u00e9 incendie<\/strong><\/li>\n\n\n\n<li>Dur\u00e9e de vie plus longue des b\u00e2timents<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-6-maintenance-requirements\">6. Exigences en mati\u00e8re d'entretien<\/h2>\n\n\n\n<p>Maintenir&nbsp;<strong>l'int\u00e9grit\u00e9 du classement au feu<\/strong>:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Contr\u00f4les annuels<\/strong>\u00a0de barri\u00e8res coupe-feu<\/li>\n\n\n\n<li><strong>R\u00e9paration rapide<\/strong>\u00a0de tout dommage<\/li>\n\n\n\n<li><strong>Documentation<\/strong>\u00a0de toutes les modifications<\/li>\n\n\n\n<li><strong>\u00c9valuations professionnelles<\/strong>\u00a0apr\u00e8s les r\u00e9novations<\/li>\n\n\n\n<li><strong>Scellement de p\u00e9n\u00e9trations<\/strong>\u00a0selon les sp\u00e9cifications du fabricant<\/li>\n<\/ol>\n\n\n\n<p>Comprendre que les mat\u00e9riaux de classe A offrent une protection de 30 \u00e0 120 minutes aide les professionnels \u00e0 concevoir des b\u00e2timents plus s\u00fbrs. Ces mat\u00e9riaux de construction r\u00e9sistants au feu sont essentiels pour r\u00e9pondre aux normes de protection contre l'incendie dans les projets commerciaux, industriels et institutionnels.<\/p>","protected":false},"excerpt":{"rendered":"<p>A Class A fire rating typically provides 30 to 120 minutes of fire protection, representing [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5603,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[1],"tags":[602,340,605],"class_list":["post-5601","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-class-a-fire-rating","tag-fire-retardant-paint","tag-what-is-class-a-fire-rated"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v26.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How Many Hours Is a Class A Fire Rating? - KAIDA PAINT\u00ae<\/title>\n<meta name=\"description\" content=\"Learn how long Class A fire ratings last (30-120 minutes), their ASTM E84 testing standards, and where to use them in buildings. 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Compare Class A\/B\/C fire resistance levels and get product selection tips.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jinyupaint.com\/fr\/how-many-hours-is-a-class-a-fire-rating.html\/\" \/>\n<meta property=\"og:site_name\" content=\"KAIDA PAINT\u00ae\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-05T07:20:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-05T07:26:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jinyupaint.com\/wp-content\/uploads\/2025\/08\/how-many-hours-is-a-class-a-fire-rating.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"jinyupaint\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"jinyupaint\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\/\/www.jinyupaint.com\/how-many-hours-is-a-class-a-fire-rating.html\",\"url\":\"https:\/\/www.jinyupaint.com\/how-many-hours-is-a-class-a-fire-rating.html\",\"name\":\"How Many Hours Is a Class A Fire Rating? - KAIDA PAINT\u00ae\",\"isPartOf\":{\"@id\":\"https:\/\/www.jinyupaint.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.jinyupaint.com\/how-many-hours-is-a-class-a-fire-rating.html#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.jinyupaint.com\/how-many-hours-is-a-class-a-fire-rating.html#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.jinyupaint.com\/wp-content\/uploads\/2025\/08\/how-many-hours-is-a-class-a-fire-rating.jpg\",\"datePublished\":\"2025-08-05T07:20:08+00:00\",\"dateModified\":\"2025-08-05T07:26:25+00:00\",\"author\":{\"@id\":\"https:\/\/www.jinyupaint.com\/#\/schema\/person\/c180feaa2102b492d985efe62f9cb01b\"},\"description\":\"Learn how long Class A fire ratings last (30-120 minutes), their ASTM E84 testing standards, and where to use them in buildings. 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Comparez les niveaux de r\u00e9sistance au feu de classe A\/B\/C et obtenez des conseils sur le choix des produits.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.jinyupaint.com\/fr\/how-many-hours-is-a-class-a-fire-rating.html\/","og_locale":"fr_FR","og_type":"article","og_title":"How Many Hours Is a Class A Fire Rating?","og_description":"Learn how long Class A fire ratings last (30-120 minutes), their ASTM E84 testing standards, and where to use them in buildings. 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