{"id":24785,"date":"2026-07-20T09:14:23","date_gmt":"2026-07-20T07:14:23","guid":{"rendered":"https:\/\/incoperfil.com\/?post_type=guia-tecnica&#038;p=24785"},"modified":"2026-09-17T11:18:45","modified_gmt":"2026-09-17T09:18:45","slug":"17-fixations-du-bac-collaborant","status":"publish","type":"guia-tecnica","link":"https:\/\/incoperfil.com\/fr\/guia-tecnica\/17-fixations-du-bac-collaborant\/","title":{"rendered":"17. Fixations du bac collaborant"},"content":{"rendered":"<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"32\" data-end=\"362\">Les fixations du bac collaborant jouent un r\u00f4le essentiel pendant la phase de coffrage. Bien qu&rsquo;elles ne participent pas au comportement structurel du plancher collaborant en phase d&rsquo;exploitation, elles sont indispensables pour garantir la stabilit\u00e9, l&rsquo;alignement et la s\u00e9curit\u00e9 de l&rsquo;ensemble avant et pendant le coulage du b\u00e9ton.<\/p>\n<h2 data-section-id=\"y7c6u\" data-start=\"364\" data-end=\"389\">Fonction des fixations<\/h2>\n<p data-start=\"391\" data-end=\"616\">Les fixations assurent le maintien des bacs sur la structure porteuse, en \u00e9vitant les d\u00e9placements, les soul\u00e8vements dus au vent ainsi que les mouvements provoqu\u00e9s par la circulation des op\u00e9rateurs et les charges de chantier.<\/p>\n<p data-start=\"618\" data-end=\"664\">Une fixation correctement r\u00e9alis\u00e9e permet de :<\/p>\n<ul data-start=\"666\" data-end=\"914\">\n<li data-section-id=\"1vcpet8\" data-start=\"666\" data-end=\"715\">Maintenir la position et l&rsquo;alignement des bacs.<\/li>\n<li data-section-id=\"1l96dji\" data-start=\"716\" data-end=\"788\">Assurer la continuit\u00e9 des recouvrements longitudinaux et transversaux.<\/li>\n<li data-section-id=\"1yb5ns\" data-start=\"789\" data-end=\"853\">Transmettre correctement les r\u00e9actions du coffrage aux appuis.<\/li>\n<li data-section-id=\"1qfwjzq\" data-start=\"854\" data-end=\"914\">\u00c9viter l&rsquo;ouverture des joints pendant le coulage du b\u00e9ton.<\/li>\n<\/ul>\n<p><\/p>\n<p data-start=\"916\" data-end=\"1061\">La disposition correcte des fixations contribue \u00e0 un b\u00e9tonnage s\u00fbr et permet de maintenir les longueurs minimales d&rsquo;appui pr\u00e9vues dans le projet.<\/p>\n<h2 data-section-id=\"cfjod2\" data-start=\"1063\" data-end=\"1084\">Types de fixations<\/h2>\n<p data-start=\"1086\" data-end=\"1147\">Le syst\u00e8me de fixation d\u00e9pend du type de structure porteuse :<\/p>\n<ul data-start=\"1149\" data-end=\"1409\">\n<li data-section-id=\"nqa4uj\" data-start=\"1149\" data-end=\"1247\">Sur poutres m\u00e9talliques : vis autoperceuses (\u00d8 env. 5,5 mm) ou syst\u00e8mes de fixation directe.<\/li>\n<li data-section-id=\"1mi5l5x\" data-start=\"1248\" data-end=\"1337\">Sur b\u00e9ton : vis autotaraudeuses (\u00d8 env. 5,5 mm) ou ancrages m\u00e9caniques \u00e9quivalents.<\/li>\n<li data-section-id=\"qqcxd6\" data-start=\"1338\" data-end=\"1409\">Sur bois : vis autoperceuses (\u00d8 env. 6,3 mm) adapt\u00e9es au support.<\/li>\n<\/ul>\n<p><\/p>\n<p data-start=\"1411\" data-end=\"1571\">Les fixations doivent garantir une liaison solide entre le bac et son support, sans endommager le rev\u00eatement galvanis\u00e9 ni compromettre la durabilit\u00e9 du syst\u00e8me.<\/p>\n<h2 data-section-id=\"1y7vqo1\" data-start=\"1573\" data-end=\"1611\">Nombre et disposition des fixations<\/h2>\n<p data-start=\"1613\" data-end=\"1742\">Le nombre et la position des fixations d\u00e9pendent du profil utilis\u00e9, de la largeur des poutres et des conditions de mise en \u0153uvre.<\/p>\n<h3 data-section-id=\"1jye4fm\" data-start=\"1744\" data-end=\"1800\">Bac \u2013 Structure : fixations transversales aux appuis<\/h3>\n<ul data-start=\"1802\" data-end=\"2009\">\n<li data-section-id=\"6qife6\" data-start=\"1802\" data-end=\"1867\">Aux appuis d&rsquo;extr\u00e9mit\u00e9 : au moins une fixation par nervure.<\/li>\n<li data-section-id=\"4xc791\" data-start=\"1868\" data-end=\"2009\">Aux appuis interm\u00e9diaires : g\u00e9n\u00e9ralement une fixation toutes les deux nervures, sauf indication contraire dans les documents du projet.<\/li>\n<\/ul>\n<p><\/p>\n<h3 data-section-id=\"10lfzg8\" data-start=\"2011\" data-end=\"2084\">Bac \u2013 Structure : fixations longitudinales sur les structures de rive<\/h3>\n<ul data-start=\"2086\" data-end=\"2136\">\n<li data-section-id=\"10qs5az\" data-start=\"2086\" data-end=\"2136\">Entraxe maximal recommand\u00e9 : 500 mm environ.<\/li>\n<\/ul>\n<p><\/p>\n<h3 data-section-id=\"1qa4cx3\" data-start=\"2138\" data-end=\"2195\">Bac \u2013 Bac : fixations des recouvrements longitudinaux<\/h3>\n<ul data-start=\"2197\" data-end=\"2359\">\n<li data-section-id=\"hks7fe\" data-start=\"2197\" data-end=\"2273\">Entraxe maximal recommand\u00e9 de 750 mm pour les bacs simplement appuy\u00e9s.<\/li>\n<li data-section-id=\"y09p9y\" data-start=\"2274\" data-end=\"2359\">Jusqu&rsquo;\u00e0 1 000 mm pour les bacs continus reposant sur trois appuis ou davantage.<\/li>\n<\/ul>\n<p><\/p>\n<p data-start=\"2361\" data-end=\"2477\">Les recouvrements doivent faire l&rsquo;objet d&rsquo;un contr\u00f4le visuel avant le coulage afin de v\u00e9rifier leur bon embo\u00eetement.<\/p>\n<h2 data-section-id=\"9nn2gf\" data-start=\"2479\" data-end=\"2529\">Nettoyage et contr\u00f4le avant le coulage du b\u00e9ton<\/h2>\n<p data-start=\"2531\" data-end=\"2729\">Une fois les fixations r\u00e9alis\u00e9es, les copeaux m\u00e9talliques produits lors du per\u00e7age doivent \u00eatre \u00e9limin\u00e9s, car ils peuvent s&rsquo;oxyder et provoquer des traces superficielles sur le rev\u00eatement galvanis\u00e9.<\/p>\n<p data-start=\"2731\" data-end=\"2780\">Avant le coulage, il est recommand\u00e9 de v\u00e9rifier :<\/p>\n<ul data-start=\"2782\" data-end=\"2925\">\n<li data-section-id=\"178rsf\" data-start=\"2782\" data-end=\"2820\">L&rsquo;int\u00e9grit\u00e9 du rev\u00eatement galvanis\u00e9.<\/li>\n<li data-section-id=\"17hihnc\" data-start=\"2821\" data-end=\"2860\">Le bon embo\u00eetement des recouvrements.<\/li>\n<li data-section-id=\"qhveti\" data-start=\"2861\" data-end=\"2925\">La pr\u00e9sence et la bonne mise en place de toutes les fixations.<\/li>\n<\/ul>\n<p><\/p>\n<p data-start=\"2927\" data-end=\"3084\">En cas de dommages ponctuels du rev\u00eatement galvanis\u00e9, une peinture de retouche riche en zinc peut \u00eatre appliqu\u00e9e conform\u00e9ment aux recommandations techniques.<\/p>\n<h2 data-section-id=\"8dtpi\" data-start=\"3086\" data-end=\"3099\">Conclusion<\/h2>\n<p data-start=\"3101\" data-end=\"3421\">Les fixations du bac collaborant constituent un \u00e9l\u00e9ment essentiel lors de la r\u00e9alisation d&rsquo;un plancher collaborant. Leur s\u00e9lection, leur disposition et leur contr\u00f4le garantissent la stabilit\u00e9 du coffrage permanent, la s\u00e9curit\u00e9 pendant le coulage du b\u00e9ton et une mise en \u0153uvre conforme aux exigences techniques du projet.<\/p>\n<h2 data-section-id=\"19iw4fc\" data-start=\"3423\" data-end=\"3453\">Manuel technique Incoperfil<\/h2>\n<p data-start=\"3455\" data-end=\"3804\">Pour une description compl\u00e8te du syst\u00e8me, des crit\u00e8res de dimensionnement, des m\u00e9thodes de calcul, des tableaux de charges, des d\u00e9tails constructifs et des proc\u00e9dures de mise en \u0153uvre, consultez le Manuel Technique du Plancher Collaborant Incoperfil, disponible apr\u00e8s inscription dans la rubrique Documentation du site Internet d&rsquo;Incoperfil.<\/p>\n<hr data-start=\"5611\" data-end=\"5614\" \/>\n<p data-start=\"3806\" data-end=\"3845\">Derni\u00e8re mise \u00e0 jour : F\u00e9vrier 2026<\/p>\n<p data-start=\"3847\" data-end=\"3882\">\u00a9 Incoperfil. Tous droits r\u00e9serv\u00e9s.<\/p>\n<p data-start=\"3884\" data-end=\"4101\" data-is-last-node=\"\" data-is-only-node=\"\">Le contenu technique de cet article fait partie du Manuel Technique du Plancher Collaborant ainsi que de la documentation enregistr\u00e9e par Incoperfil aupr\u00e8s de ColorIURIS (Acte n\u00b0 1-INCOPERFIL-12.2025).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La disposition correcte des fixations du plancher collaborant garantit la stabilit\u00e9 du coffrage permanent et la s\u00e9curit\u00e9 pendant le coulage du b\u00e9ton. Le respect du nombre, de l&#8217;emplacement et de l&rsquo;espacement des fixations, ainsi que la bonne r\u00e9alisation des recouvrements longitudinaux et transversaux, est essentiel pour assurer une mise en \u0153uvre s\u00fbre et fiable du syst\u00e8me.<\/p>\n","protected":false},"author":2,"featured_media":14116,"menu_order":18,"template":"","meta":{"_acf_changed":false},"categories":[1327],"tags":[],"class_list":["post-24785","guia-tecnica","type-guia-tecnica","status-publish","has-post-thumbnail","hentry","category-guides-techniques-pour-plancher-collaborant"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>17. 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