{"id":992019,"date":"2023-09-28T07:59:59","date_gmt":"2023-09-28T07:59:59","guid":{"rendered":"https:\/\/www.gamma-industries.com\/2023\/09\/28\/understanding-the-french-document-dtu-57-1\/"},"modified":"2025-07-10T07:07:36","modified_gmt":"2025-07-10T07:07:36","slug":"understanding-the-french-document-dtu-57-1","status":"publish","type":"post","link":"https:\/\/www.gamma-industries.com\/en\/2023\/09\/28\/understanding-the-french-document-dtu-57-1\/","title":{"rendered":"Understanding the French document DTU 57.1"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"992019\" class=\"elementor elementor-992019 elementor-991961\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-64daa8ed elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"64daa8ed\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cacba17\" data-id=\"7cacba17\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-468f341c elementor-widget elementor-widget-text-editor\" data-id=\"468f341c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The NF EN 12825 standard explains the technical criteria for raised floors (slabs, pedestals, measurement and testing methods) . It was created in January 2002. It has been created and adopted by all recognized European manufacturers.<\/p><p>The NF 57.1 standard applicable to markets defines the conditions of implementation and the contractual fields of raised floors. This standard was modified in September 2007, then in <strong>May 2020.<\/strong><\/p><p>Like any French DTU, 57.1 includes 3 parts, called P1-1, P1-2 and P2.<\/p><p>These standards are available from<br>. Don\u2019t hesitate to order them from them.<\/p><p> <\/p><hr><p>You will find below the main guidelines of DTU 57.1<br><br><\/p><p>It applies to all French climatic zones and does not cover the overseas departments and regions.<\/p><p> <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2250896 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2250896\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-daf526a\" data-id=\"daf526a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6bed86d elementor-widget elementor-widget-text-editor\" data-id=\"6bed86d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3 style=\"text-align: left;\">1. &#8211; Links to other standards &amp; vocabulary<\/h3>\n\nIn addition to the NF EN 12825 standard, the NF DTU 57.1 document specifies in \u00a72, the references to other DTUs including:\n<ul>\n \t<li> NF DTU 21 applying to concrete works,<\/li>\n \t<li>NF DTU 53.1 applying to textile floors<\/li>\n \t<li>NF DTU 59.3 applying to floor paints<\/li>\n<\/ul>\nThen, there are definitions of vocabulary used, including in particular those of the NF EN 12825 standard which we will not detail here.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d195b82 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d195b82\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6ab508a\" data-id=\"6ab508a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cacadfc elementor-widget elementor-widget-text-editor\" data-id=\"cacadfc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>2. &#8211; Characteristics<\/h3><p>The characteristics mentioned here are detailed in the reference standard.<\/p><h4>2.1 &#8211; Requirements before work<\/h4><ul><li>Premises kept out of water and out of air<\/li><li>ambient temperature: 12 to 24\u00b0C, humidity 45 to 70% (storage and work)<\/li><li>Materials made available according to a delivery and installation schedule<\/li><li>Plans specifying the characteristics of all structures surrounding the floors<\/li><li>Provision of lifting means<\/li><li>Clear and secure spaces to allow supplies and handling in strategic locations: the floor elements must be stored as close as possible to the premises to be installed (even climatic conditions).<\/li><li>Acoustic, fire, electrical and level requirements are clearly defined before the construction site<\/li><\/ul><h4>2.2 &#8211; Compliance with standard NF EN 12825<\/h4><p>The DTU recalls the technical requirements for projects and in particular compliance with the technical characteristics mentioned in standard NF EN 12825 (load classes), and in particular the notion of RESISTANCE TO VERTICAL FORCES.<\/p><h4>2.3 &#8211; Nature of the soil<\/h4><p>The DTU recalls the specific characteristics of concrete slabs (raw) and in particular the concerns due to their surface condition.<br>The nature of the soil therefore influences the height of the plenum, and the supports must be accepted before installing floors: resistance to weight, resistance to static and dynamic loads, resistance to forces transmitted to the base by jacks, resistance to the tearing off of parts glued to the support.<\/p><h4>2.4 &#8211; Traffic<\/h4><p>The DTU recalls a very important directive.<br>\u201cNo traffic other than that of the company is permitted on the raised floor during the work and at the earliest 48 hours after the end of installation&#8230;\u201d (in order to guarantee bonding.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-decc171 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"decc171\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c13276d\" data-id=\"c13276d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a2e0c39 elementor-drop-cap-yes elementor-drop-cap-view-default elementor-widget elementor-widget-text-editor\" data-id=\"a2e0c39\" data-element_type=\"widget\" data-settings=\"{&quot;drop_cap&quot;:&quot;yes&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>3. Implementation<\/h3>\n\nThe requirements for maintaining temperature and humidity are recalled, as well as the criterion out of water, out of air.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0806204 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0806204\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7a2d7c8\" data-id=\"7a2d7c8\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7b8ccb0 elementor-widget elementor-widget-image\" data-id=\"7b8ccb0\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.gamma-industries.com\/wp-content\/uploads\/2023\/08\/iStock-1011294248-1024x768.jpg\" class=\"attachment-large size-large wp-image-991398\" alt=\"\" srcset=\"https:\/\/www.gamma-industries.com\/wp-content\/uploads\/2023\/08\/iStock-1011294248-1024x768.jpg 1024w, https:\/\/www.gamma-industries.com\/wp-content\/uploads\/2023\/08\/iStock-1011294248-300x225.jpg 300w, https:\/\/www.gamma-industries.com\/wp-content\/uploads\/2023\/08\/iStock-1011294248-768x576.jpg 768w, https:\/\/www.gamma-industries.com\/wp-content\/uploads\/2023\/08\/iStock-1011294248-1536x1152.jpg 1536w, https:\/\/www.gamma-industries.com\/wp-content\/uploads\/2023\/08\/iStock-1011294248-2048x1536.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8811b50 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8811b50\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d9c7217\" data-id=\"d9c7217\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9b2fdb2 elementor-widget elementor-widget-text-editor\" data-id=\"9b2fdb2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>3.1 &#8211; Anti-dust paint<\/h4><p>If it is carried out, the paint (DTU 59.3) must be taken into account for compatibility with the floor to be installed.<\/p><p>The floors must be free and dusted.<\/p><h4>3.2 &#8211; Assembly<\/h4><p>The DTU then recalls key elements for the installation including: <\/p><ul><li>Requirement for a general materialized level (NGF)<\/li><li>Definition of layout start axes<\/li><li>Edge slabs (on the periphery of the installed floor): they will be at least 100 mm <\/li><li>Start of installation never on the edge: in the center, on one side, or a corner of the area to be installed<\/li><\/ul><h4>3.3 &#8211; Finishes <\/h4><ul><li>Edge slabs and cutouts around obstacles: they must be installed after complete adjustment of the solid slabs<\/li><li>The framework must be prepared to receive the slabs<\/li><li>If equipotential connection, it is authorized to assemble it gradually and not at the end of the project<\/li><li>The accessories are installed at the end of the phase<\/li><li>The company must clear the site of products related to its service<\/li><li>The company, after having verified its installation, must request a contradictory report to be carried out with the project owner to validate the service.<\/li><\/ul><h4>3.4 &#8211; Accessories<\/h4><p> <\/p><p> <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>The NF EN 12825 standard explains the technical criteria for raised floors (slabs, pedestals, measurement and testing methods) . It was created in January 2002. It has been created and adopted by all recognized European manufacturers. The NF 57.1 standard applicable to markets defines the conditions of implementation and the contractual fields of raised floors&#8230;.<\/p>\n","protected":false},"author":6,"featured_media":990268,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[124,108,123,107],"tags":[126,125,127],"class_list":["post-992019","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-certification-en","category-job","category-manufacturing","category-news","tag-floors","tag-standard","tag-works"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Understanding the French document DTU 57.1 - Gamma Industries<\/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:\/\/www.gamma-industries.com\/en\/2023\/09\/28\/understanding-the-french-document-dtu-57-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Understanding the French document DTU 57.1 - Gamma Industries\" \/>\n<meta property=\"og:description\" content=\"The NF EN 12825 standard explains the technical criteria for raised floors (slabs, pedestals, measurement and testing methods) . 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It was created in January 2002. It has been created and adopted by all recognized European manufacturers. 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