{"id":11565,"date":"2021-02-12T15:23:56","date_gmt":"2021-02-12T20:23:56","guid":{"rendered":"https:\/\/cep-experts.ca\/snow-retention-systems\/"},"modified":"2021-12-22T11:55:07","modified_gmt":"2021-12-22T16:55:07","slug":"systeme-de-retention-de-neige","status":"publish","type":"post","link":"https:\/\/cep-experts.ca\/fr\/systeme-de-retention-de-neige\/","title":{"rendered":"Syst\u00e8me de r\u00e9tention de neige"},"content":{"rendered":"\t\t<div class=\"et_pb_section et_pb_with_background et_section_regular breadcrumbs_section\">\r\n\t\t\t<div class=\" et_pb_row breadcrumbs_row\">\r\n\t\t\t\t<div class=\"et_pb_column et_pb_column_4_4 breadcrumbs_column\">\r\n\t\t\t\t\t<div class=\"et_pb_code et_pb_module breadcrumbs_module\">\r\n\t\t\t\t\t\t<span><span><a href=\"https:\/\/cep-experts.ca\/fr\/\">Accueil<\/a><\/span><\/span>\t\t\t\t\t<\/div> <!-- .et_pb_code -->\r\n\t\t\t\t<\/div> <!-- .et_pb_column -->\r\n\t\t\t<\/div> <!-- .et_pb_row -->\r\n\t\t<\/div>\r\n\t[et_pb_section bb_built=\u00a0\u00bb1&Prime; 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header_6_text_shadow_blur_strength=\u00a0\u00bbheader_6_text_shadow_style,%91object Object%93&Prime;]\r\n\r\n<p>Par Robert Massarelli, ing., M.Ing.<\/p>\r\n<p>La gestion de la neige sur les toits pendant un hiver canadien typique peut poser plusieurs d\u00e9fis. Entre la neige qui d\u00e9rive des surfaces voisines, les accumulations in\u00e9gales et les probl\u00e8mes li\u00e9s aux cycles de gel et de d\u00e9gel, il est essentiel de comprendre le comportement de la neige accumul\u00e9e sur un toit, surtout quand il s&rsquo;agit de la s\u00e9curit\u00e9 des occupants et des passants.<\/p>\r\n<p>Nous les avons tous vus, pr\u00e8s de l&rsquo;endroit o\u00f9 les individus se rassemblent \u00e0 l&rsquo;ext\u00e9rieur d&rsquo;une entr\u00e9e principale, le long des voies pi\u00e9tonnes qui nous am\u00e8nent \u00e0 proximit\u00e9 imm\u00e9diate d&rsquo;un b\u00e2timent, ces panneaux typiquement lumineux, identifiables et qui indiquent : \u00ab\u00a0Attention aux chutes de neige !\u00a0\u00bb<\/p>\r\n<p>D\u2019o\u00f9 le besoin pour des syst\u00e8mes de r\u00e9tention de neige !<\/p>\r\n<p>Les syst\u00e8mes de r\u00e9tention de neige sont, comme leur nom l&rsquo;indique, destin\u00e9s \u00e0 maintenir une accumulation de neige solidement en place sur un toit. Leur objectif est simple : maintenir la neige en place pour \u00e9viter qu&rsquo;elle ne tombe en cascade du toit \u00e0 la mani\u00e8re d&rsquo;une avalanche. Alternativement, la neige pourra alors fondre progressivement. Ce que les propri\u00e9taires de b\u00e2timents ignorent peut-\u00eatre, cependant, c&rsquo;est que le bon fonctionnement des syst\u00e8mes de r\u00e9tention de neige d\u00e9pend de nombreux facteurs. En bref, il s\u2019agit de syst\u00e8mes complexes qui doivent \u00eatre adapt\u00e9s aux sp\u00e9cifications de chaque installation dans laquelle ils seront utilis\u00e9s.<\/p>\r\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-10853 alignleft\" src=\"https:\/\/cep-experts.ca\/wp-content\/uploads\/2021\/03\/snow-retention-systems-1.jpg\" alt=\"\" width=\"359\" height=\"239\" \/>Les syst\u00e8mes de r\u00e9tention de neige se pr\u00e9sentent sous deux formes: les arr\u00eats de neige individuels (crampons) et les arr\u00eats de neige \u00e0 barreaux (cl\u00f4tures \u00e0 neige). Les crampons sont des unit\u00e9s individuelles qui sont fix\u00e9es \u00e0 un toit \u00e0 l&rsquo;aide d&rsquo;adh\u00e9sifs ou de fixations m\u00e9caniques. Ils sont fr\u00e9quemment plac\u00e9s sur plusieurs rang\u00e9es et peuvent \u00eatre install\u00e9s sur une surface importante du toit, selon les besoins. Ils fonctionnent en fournissant une friction suppl\u00e9mentaire dans une accumulation de neige, en la maintenant en place ou en lui permettant de cascader du toit, et ce, de mani\u00e8re contr\u00f4l\u00e9e.<\/p>\r\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-10857 alignright\" src=\"https:\/\/cep-experts.ca\/wp-content\/uploads\/2021\/03\/cep-snow-retention-systems-2.jpg\" alt=\"\" width=\"318\" height=\"256\" \/><\/p>\r\n<p>Les cl\u00f4tures \u00e0 neige, quant \u00e0 elles, sont constitu\u00e9es de supports r\u00e9guli\u00e8rement espac\u00e9s et sur lesquels sont fix\u00e9s des barreaux m\u00e9talliques, les barres \u00e9tant g\u00e9n\u00e9ralement orient\u00e9es dans une direction perpendiculaire \u00e0 la direction de la neige glissante. Ils peuvent \u00eatre install\u00e9s sur des rang\u00e9es simples ou sur plusieurs rang\u00e9es, selon les besoins. Contrairement aux crampons, les supports des cl\u00f4tures \u00e0 neige sont g\u00e9n\u00e9ralement fix\u00e9s m\u00e9caniquement et uniquement \u00e0 l&rsquo;aide d&rsquo;attaches install\u00e9es \u00e0 travers le toit et dans la structure, ou \u00e0 l&rsquo;aide de supports qui se fixent sur les joints verticaux des panneaux m\u00e9talliques de toiture.<\/p>\r\n<p>La mani\u00e8re dont un syst\u00e8me de r\u00e9tention de neige est fix\u00e9 au toit est un crit\u00e8re important, car la r\u00e9sistance du syst\u00e8me d\u00e9pend largement de la r\u00e9sistance des attaches. Les mat\u00e9riaux adh\u00e9sifs peuvent bien fonctionner, mais leur application peut \u00eatre irr\u00e9guli\u00e8re et sujette \u00e0 des erreurs de construction. D&rsquo;autre part, des attaches m\u00e9caniques, telles que des vis, p\u00e9n\u00e8trent physiquement l\u2019enveloppe de la toiture et peuvent fournir un parcours facile pour que l&rsquo;eau p\u00e9n\u00e8tre dans le syst\u00e8me de toiture. Pour limiter cette probl\u00e9matique, de nombreux fabricants sp\u00e9cifient que des vis avec des rondelles en n\u00e9opr\u00e8ne (caoutchouc synth\u00e9tique) doivent \u00eatre utilis\u00e9es dans leurs installations ainsi que diverses formes de scellants. Un autre type de fixation m\u00e9canique, soit les pinces, peut \u00eatre utilis\u00e9 avec les toits \u00e0 joints debout en m\u00e9tal. Ces attaches \u00ab pincent \u00bb les joints avec des vis \u00e0 pointe ronde. Quel que soit le syst\u00e8me de r\u00e9tention choisi, il est important qu\u2019il soit install\u00e9 conform\u00e9ment aux instructions du fabricant. Ces syst\u00e8mes ne sont pas g\u00e9n\u00e9riques et chacun doit \u00eatre choisi en fonction de la charge de neige \u00e0 laquelle le syst\u00e8me sera soumis lors de son utilisation.<\/p>\r\n<p>Les variables utilis\u00e9es pour d\u00e9terminer la charge de neige sur un syst\u00e8me de r\u00e9tention sont (pour un toit \u00e0 pignon standard) : la charge de neige sp\u00e9cifi\u00e9e par le Code, la pente du toit, et la longueur du toit, et ce, \u00e0 partir de l&rsquo;avant-toit jusqu\u2019au sommet (mesur\u00e9e horizontalement). Pour les cl\u00f4tures \u00e0 neige, la longueur du toit parall\u00e8le \u00e0 l&rsquo;avant-toit est \u00e9galement requise. Les valeurs de charge obtenues avec ces informations peuvent ensuite \u00eatre compar\u00e9es aux donn\u00e9es disponibles aupr\u00e8s des fabricants, obtenues par des essais, pour d\u00e9terminer la quantit\u00e9 et l&rsquo;espacement n\u00e9cessaires des \u00e9l\u00e9ments de r\u00e9tention. Si un fabricant ne dispose pas de donn\u00e9es d&rsquo;essai pour son syst\u00e8me, il serait probablement judicieux d&rsquo;en choisir un chez un autre fabricant. Il est important de noter que de nombreux fabricants disposent de documentation et de calculateurs en ligne pour faciliter le processus de s\u00e9lection.<\/p>\r\n<div id=\"attachment_10855\" style=\"width: 380px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-10855\" class=\"wp-image-10855\" src=\"https:\/\/cep-experts.ca\/wp-content\/uploads\/2021\/03\/snow-retention-systems-3.jpg\" alt=\"\" width=\"370\" height=\"222\" \/><p id=\"caption-attachment-10855\" class=\"wp-caption-text\">https:\/\/www.snoshield.com\/snow-guards-metal-roof\/<\/p><\/div>\r\n<p>Finalement, les deux crit\u00e8res \u00e0 consid\u00e9rer sont l\u2019emplacement et l&rsquo;installation. Selon les bonnes pratiques, les syst\u00e8mes de r\u00e9tention de neige sont mieux plac\u00e9s dans la moiti\u00e9 inf\u00e9rieure d&rsquo;un toit. En effet, \u00e0 mesure que la neige descend la pente du toit par gravit\u00e9, le manteau neigeux devient plus dense (plus lourd), et ce, \u00e0 mesure que vous vous approchez du bord. Ultimement, l\u2019installation finale doit \u00eatre achev\u00e9e en fonction des instructions du fabricant et des d\u00e9tails techniques. Un syst\u00e8me qui n\u2019est pas accompagn\u00e9 d\u2019instructions et de d\u00e9tails techniques a plus de chances d&rsquo;\u00e9chouer. Par exemple, si les fixations utilis\u00e9es pour maintenir le syst\u00e8me en place n&rsquo;\u00e9taient pas assez nombreuses ou mal ancr\u00e9es \u00e0 la structure, les supports peuvent se d\u00e9gager au niveau de leurs attaches. Cela peut rapidement surcharger les \u00e9l\u00e9ments adjacents, entra\u00eenant leur d\u00e9faillance par un effet domino assez rapide.<\/p>\r\n<p>La d\u00e9faillance d&rsquo;un syst\u00e8me de r\u00e9tention de neige peut r\u00e9sulter en une cascade de neige accumul\u00e9e sur le toit. Cela repr\u00e9sente non seulement un risque de dommages mat\u00e9riels, mais \u00e9galement un probl\u00e8me de s\u00e9curit\u00e9 important. Une d\u00e9faillance du syst\u00e8me ne signifie pas n\u00e9cessairement qu&rsquo;il a \u00e9t\u00e9 mal con\u00e7u ou install\u00e9, mais ce sont des facteurs cl\u00e9s \u00e0 \u00e9valuer. Esp\u00e9rons qu&rsquo;avec les informations fournies dans ce document, des risques comme ceux-ci pourront \u00eatre \u00e9vit\u00e9s.<\/p>\r\n\r\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]","protected":false},"excerpt":{"rendered":"<p>La gestion de la neige sur les toits pendant un hiver canadien typique peut poser plusieurs d\u00e9fis. Entre la neige qui d\u00e9rive des surfaces voisines, les accumulations in\u00e9gales et les probl\u00e8mes li\u00e9s aux cycles de gel et de d\u00e9gel, il est essentiel de comprendre le comportement de la neige accumul\u00e9e sur un toit, surtout quand il s&rsquo;agit de la s\u00e9curit\u00e9 des occupants et des passants.<\/p>\n","protected":false},"author":1,"featured_media":11064,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-11565","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Syst\u00e8me de r\u00e9tention de neige - CEP Forensique<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cep-experts.ca\/fr\/systeme-de-retention-de-neige\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Syst\u00e8me de r\u00e9tention de neige - CEP Forensique\" \/>\n<meta property=\"og:description\" content=\"La gestion de la neige sur les toits pendant un hiver canadien typique peut poser plusieurs d\u00e9fis. Entre la neige qui d\u00e9rive des surfaces voisines, les accumulations in\u00e9gales et les probl\u00e8mes li\u00e9s aux cycles de gel et de d\u00e9gel, il est essentiel de comprendre le comportement de la neige accumul\u00e9e sur un toit, surtout quand il s&#039;agit de la s\u00e9curit\u00e9 des occupants et des passants.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cep-experts.ca\/fr\/systeme-de-retention-de-neige\/\" \/>\n<meta property=\"og:site_name\" content=\"CEP Forensique\" \/>\n<meta property=\"article:published_time\" content=\"2021-02-12T20:23:56+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-12-22T16:55:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cep-experts.ca\/wp-content\/uploads\/2021\/03\/snow-retention-systems-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1307\" \/>\n\t<meta property=\"og:image:height\" content=\"870\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"bangmarketing\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"bangmarketing\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimation du temps de lecture\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/cep-experts.ca\/fr\/systeme-de-retention-de-neige\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/cep-experts.ca\/fr\/systeme-de-retention-de-neige\/\"},\"author\":{\"name\":\"bangmarketing\",\"@id\":\"https:\/\/cep-experts.ca\/fr\/#\/schema\/person\/801b2438568ae02c0d9fe9a0387b1d34\"},\"headline\":\"Syst\u00e8me de r\u00e9tention de neige\",\"datePublished\":\"2021-02-12T20:23:56+00:00\",\"dateModified\":\"2021-12-22T16:55:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/cep-experts.ca\/fr\/systeme-de-retention-de-neige\/\"},\"wordCount\":1839,\"image\":{\"@id\":\"https:\/\/cep-experts.ca\/fr\/systeme-de-retention-de-neige\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/cep-experts.ca\/wp-content\/uploads\/2021\/03\/snow-retention-systems-1.jpg\",\"inLanguage\":\"fr-CA\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/cep-experts.ca\/fr\/systeme-de-retention-de-neige\/\",\"url\":\"https:\/\/cep-experts.ca\/fr\/systeme-de-retention-de-neige\/\",\"name\":\"Syst\u00e8me de r\u00e9tention de neige - 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