{"id":2305,"date":"2026-04-27T12:58:38","date_gmt":"2026-04-27T12:58:38","guid":{"rendered":"https:\/\/protasoftware.com\/fr\/wiki\/utilisation-des-pannes\/"},"modified":"2026-04-27T12:58:38","modified_gmt":"2026-04-27T12:58:38","slug":"utilisation-des-pannes","status":"publish","type":"wiki","link":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/utilisation-des-pannes\/","title":{"rendered":"Utilisation des pannes"},"content":{"rendered":"<div>\n<h1 class=\"toc_anchors\" id=\"Define_a_New_Purlins\"><span class=\"colour\">D\u00e9finir de nouvelles pannes<br \/><\/span><\/h1>\n<p style=\"margin: 0px;padding: 0px;line-height: 20px\"><span class=\"colour\"><span class=\"font\" style=\"line-height: normal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Avant d&rsquo;ins\u00e9rer des pannes, les treillis, poutres ou \u00e9l\u00e9ments de portique m\u00e9tallique doivent \u00eatre d\u00e9finis.&nbsp;<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/span><\/p>\n<p style=\"margin: 0px;padding: 0px;line-height: 20px\"><span class=\"colour\"><span class=\"font\" style=\"line-height: normal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Pour d\u00e9finir des pannes :<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/span><\/p>\n<ol style=\"font-size: 14px\">\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7;list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp;Cliquez sur le bouton \u00ab <\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Panne<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"> \u00bb&nbsp;dans la barre d&rsquo;outils, ou utilisez la ligne de commande en bas \u00e0 droite. Il existe deux m\u00e9thodes d&rsquo;insertion de pannes : <b>Ins\u00e9rer \u00e0 l&rsquo;aide de deux \u00e9l\u00e9ments<\/b> ou <b>Ins\u00e9rer \u00e0 l&rsquo;aide de plusieurs \u00e9l\u00e9ments<\/b>.<br \/><\/span><\/span><span class=\"colour\">&nbsp;<\/span><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-c367e3cc3a69af9767ba773b5fd1b510.png\" style=\"max-width: 100%;height: auto;padding: 0px\"><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7;list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp;Pour&nbsp;<b>Ins\u00e9rer \u00e0 l&rsquo;aide de deux \u00e9l\u00e9ments<\/b>, s\u00e9lectionnez le premier treillis ou \u00e9l\u00e9ment de portique, puis le second,&nbsp;\u00e0 l&rsquo;endroit o\u00f9 les pannes seront ins\u00e9r\u00e9es. Les treillis, poutres ou \u00e9l\u00e9ments de portique interm\u00e9diaires sont d\u00e9tect\u00e9s automatiquement. Pour que les pannes soient consid\u00e9r\u00e9es comme des poutres simples, aucun treillis ni poutre interm\u00e9diaire ne doit \u00eatre pr\u00e9sent. Sinon, les pannes sont consid\u00e9r\u00e9es comme des poutres continues.&nbsp;&nbsp;<\/span><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7;list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp;Pour&nbsp;<b>Ins\u00e9rer \u00e0 l&rsquo;aide de plusieurs \u00e9l\u00e9ments<\/b>, appuyez sur ENTR\u00c9E apr\u00e8s avoir s\u00e9lectionn\u00e9 tous les treillis ou \u00e9l\u00e9ments de portique.&nbsp;Cette fonction permet de choisir des \u00e9l\u00e9ments de portique sp\u00e9cifiques comme \u00e9l\u00e9ments porteurs.&nbsp;<\/span><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7;list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp;La bo\u00eete de dialogue Panne s&rsquo;ouvre. La g\u00e9om\u00e9trie des pannes et les charges appliqu\u00e9es se d\u00e9finissent comme suit :&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<\/span><br \/><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-76bfc8315d7f6af0024c461fd69683b3.png\" style=\"max-width: 100%;padding: 0px;height: auto\" data-zdeskdocid=\"img_5011649440448023\" class=\"docsimage\" data-zdeskdocselectedclass=\"original\"><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7;list-style-type: decimal\">\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Dans la bo\u00eete de dialogue G\u00e9om\u00e9trie<br \/><\/span><\/span><\/div>\n<ul style=\"list-style-type: disc;margin: auto;padding: 0px 0px 0px 40px\">\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Profil\/Section des pannes : s\u00e9lectionnez la section des pannes pour la membrure sup\u00e9rieure et la membrure inf\u00e9rieure.&nbsp;<br \/><\/span><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Alignement de la section (par exemple Sur la section \/ Sous la section \/ Centr\u00e9, etc.)<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Alignement de la section sur la membrure sup\u00e9rieure : alignements \u00ab <\/span><b><span class=\"colour\">Sur la section<\/span><\/b><span class=\"colour\"> \u00bb, \u00ab <\/span><b><span class=\"colour\">Sous la section<\/span><\/b><span class=\"colour\"> \u00bb, \u00ab <\/span><b><span class=\"colour\">Centr\u00e9<\/span><\/b><span class=\"colour\"> \u00bb, \u00ab <\/span><b><span class=\"colour\">Align\u00e9 en haut<\/span><\/b><span class=\"colour\"> \u00bb, \u00ab <\/span><b><span class=\"colour\">Align\u00e9 en bas<\/span><\/b><span class=\"colour\"> \u00bb&nbsp;<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Alignement de la section sur la membrure inf\u00e9rieure : alignements \u00ab <\/span><b><span class=\"colour\">Sur la section<\/span><\/b><span class=\"colour\"> \u00bb, \u00ab <\/span><b><span class=\"colour\">Sous la section<\/span><\/b><span class=\"colour\"> \u00bb, \u00ab <\/span><b><span class=\"colour\">Centr\u00e9<\/span><\/b><span class=\"colour\"> \u00bb, \u00ab <\/span><b><span class=\"colour\">Align\u00e9 en haut<\/span><\/b><span class=\"colour\"> \u00bb, \u00ab <\/span><b><span class=\"colour\">Align\u00e9 en bas<\/span><\/b><span class=\"colour\"> \u00bb<\/span><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><\/span><\/span><span class=\"colour\"><span style=\"font-size: 16px;line-height: normal\" class=\"size\">Panne continue. Vous pouvez indiquer la&nbsp;<b>Longueur maximale d&rsquo;\u00e9l\u00e9ment<\/b> (longueur de coupe) des pannes dans le <b>Centre de param\u00e8tres<\/b>, sous <b>Param\u00e8tres Acier<\/b> &gt; <b>Calcul des \u00e9l\u00e9ments<\/b>.<\/span><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">M\u00e9thode de g\u00e9n\u00e9ration (pannes plac\u00e9es aux n\u0153uds du treillis ou selon un espacement)<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Style de disposition : lorsque les treillis ont des longueurs diff\u00e9rentes, les pannes peuvent s&rsquo;aligner sur l&rsquo;\u00e9l\u00e9ment court ou sur l&rsquo;\u00e9l\u00e9ment long. L&rsquo;utilisateur peut utiliser les options \u00ab Perpendiculaire depuis le plus court \u00bb ou \u00ab Perpendiculaire depuis le plus long \u00bb.&nbsp; &nbsp;&nbsp;<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Supprimer le premier \u00e9l\u00e9ment<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Supprimer le dernier \u00e9l\u00e9ment<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Longueur de porte-\u00e0-faux gauche et droite de la panne&nbsp;<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Espacement entre pannes continues<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">D\u00e9finissez le d\u00e9calage de la premi\u00e8re et de la derni\u00e8re panne.\n<p><\/span><\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7;list-style-type: decimal\">\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp;Cliquez sur \u00ab Tirants \u00bb sous Options g\u00e9n\u00e9rales pour modifier les propri\u00e9t\u00e9s g\u00e9om\u00e9triques des tirants.&nbsp;<\/span><\/span><\/div>\n<div style=\"font-size: 15px\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Les tirants r\u00e9duisent la longueur de flambement des pannes et des lisses. Vous pouvez inclure leur effet dans l&rsquo;analyse du b\u00e2timent en cochant l&rsquo;option \u00ab Inclure dans l&rsquo;analyse \u00bb.&nbsp;<\/span><\/span><\/div>\n<div style=\"font-size: 15px\"><\/div>\n<div style=\"font-size: 15px\"><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-6d9321f661c6adc25ae234f3fa9b2f0e.png\" style=\"padding: 0px;max-width: 100%;width: 642px;height: auto\" data-zdeskdocid=\"img_7005514960031989\" class=\"docsimage\" data-zdeskdocselectedclass=\"best\">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<\/span><\/div>\n<\/li>\n<li style=\"margin: 0px;padding: 0px;line-height: 1.7;list-style-type: decimal\">\n<div style=\"font-size: 15px\"><span class=\"colour\">\u00ab Automatique \u00bb ou \u00ab Manuel \u00bb peuvent \u00eatre utilis\u00e9s comme&nbsp;<\/span><b><span class=\"colour\">M\u00e9thode d&rsquo;insertion<\/span><\/b><span class=\"colour\">. Vous pouvez supprimer les tirants avec l&rsquo;option \u00ab Aucun \u00bb.&nbsp;<br \/><\/span><\/div>\n<div style=\"font-size: 15px\"><span class=\"colour\">Si \u00ab Automatique \u00bb est s\u00e9lectionn\u00e9 comme m\u00e9thode d&rsquo;insertion, l&rsquo;utilisateur doit d\u00e9finir le \u00ab Nombre de tirants \u00bb.&nbsp;<br \/><\/span><\/div>\n<div style=\"font-size: 15px\"><span class=\"colour\">Vous pouvez modifier les propri\u00e9t\u00e9s g\u00e9om\u00e9triques des tirants et des suspentes de profil\u00e9 depuis le menu ci-dessous.<br \/><\/span><\/div>\n<div style=\"font-size: 15px\"><span class=\"colour\"><br \/><\/span><\/div>\n<div style=\"font-size: 15px\"><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-7ad089fc3dda.png\" style=\"padding: 0px;max-width: 100%\"><\/div>\n<\/li>\n<\/ol>\n<div style=\"font-size: 15px\">\n<div><span style=\"margin: 10px 0px;position: relative;padding: 10px 10px 10px 40px\" class=\"KB_New_Editor_Highlights\"><img decoding=\"async\" alt=\"Alert\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-594248e3d1a61c7902e3a03302b7e2e7.png\" data-type=\"non-resize\" style=\"position: absolute;left: 12px;top: 14px;width: 15px;max-width: 100%\" data-image=\"contentStyle\"><\/p>\n<div>Les tirants sont des \u00e9l\u00e9ments secondaires qui retiennent la panne dans le plan de la toiture. Ils sont importants pour calculer les pannes dans ProtaStructure.&nbsp; &nbsp;Les pannes sont g\u00e9n\u00e9ralement des \u00e9l\u00e9ments form\u00e9s \u00e0 froid ; le calcul des \u00e9l\u00e9ments form\u00e9s \u00e0 froid ne fait pas partie du p\u00e9rim\u00e8tre de ProtaStructure.&nbsp; Si vous ne pr\u00e9voyez pas de calculer les pannes dans ProtaStructure, l&rsquo;insertion de tirants n&rsquo;est pas n\u00e9cessaire.&nbsp; En outre,&nbsp;<span>les tirants augmentent nettement la taille du mod\u00e8le si les pannes sont nombreuses.&nbsp;<\/span><\/div>\n<p><\/span><\/div>\n<div><\/div>\n<\/div>\n<div>\n<h1 class=\"toc_anchors\" id=\"Edit_Purlins\"><span class=\"colour\">Modifier les pannes<\/span><\/h1>\n<div>\n<p style=\"margin: 0px;padding: 0px;line-height: 20px\"><span style=\"line-height: normal\" class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Pour modifier les pannes :<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/p>\n<ol>\n<li style=\"list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp;S\u00e9lectionnez les pannes existantes, effectuez un clic droit puis s\u00e9lectionnez \u00ab <\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Propri\u00e9t\u00e9s<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"> \u00bb.<br \/><\/span><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp;Modifiez les param\u00e8tres dans la bo\u00eete de dialogue G\u00e9om\u00e9trie ou Charges, puis cliquez sur&nbsp;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">OK<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">.<\/span><\/span><\/li>\n<\/ol>\n<\/div>\n<h1 id=\"Assign_Loading_on_Purlin_using_Cladding\" class=\"toc_anchors\"><span class=\"colour\">Attribuer un chargement sur les pannes \u00e0 l&rsquo;aide du bardage<\/span><br \/><\/h1>\n<\/div>\n<\/div>\n<div>\n<div><span class=\"colour\">Il est fortement recommand\u00e9 de mod\u00e9liser un bardage de toiture sur les pannes et d&rsquo;ins\u00e9rer les charges surfaciques de toiture sur le bardage.&nbsp; Consultez :<\/span>&nbsp;<a href=\"https:\/\/support.protasoftware.com\/portal\/en\/kb\/articles\/working-with-claddings-8-7-2021\" target=\"_blank\" rel=\"noopener noreferrer\">Travailler avec les bardages<\/a><\/div>\n<div><span class=\"colour\">Les charges surfaciques du bardage sont calcul\u00e9es automatiquement sur les pannes.&nbsp;<\/span><\/div>\n<div>\n<h1 id=\"Assign_or_Verify_Loading_on_Purlin_using_Edit_Load\" class=\"toc_anchors\"><span class=\"colour\">Attribuer ou v\u00e9rifier un chargement sur les pannes avec Modifier le chargement<\/span><\/h1>\n<\/div>\n<div><span><span class=\"colour\">Vous pouvez v\u00e9rifier et ins\u00e9rer directement des charges sur les pannes avec la fonction Modifier le chargement.&nbsp;<\/span><\/span><\/div>\n<div><\/div>\n<div><img decoding=\"async\" data-zdeskdocselectedclass=\"original\" class=\"docsimage\" data-zdeskdocid=\"img_1693320010104411\" style=\"padding: 0px;max-width: 100%\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-4445aa79978521db1d7efa95df974a3d.png\"><\/div>\n<div><\/div>\n<div>\n<ol>\n<li style=\"list-style-type: decimal\"><span class=\"colour\">S\u00e9lectionnez les pannes &gt;&nbsp; cliquez sur<\/span><b><span class=\"colour\"> Modifier le chargement<\/span><\/b><span class=\"colour\"> dans le ruban sup\u00e9rieur de la panne. (Vous pouvez aussi effectuer un clic droit &gt; cliquer sur <\/span><b><span class=\"colour\">Modifier le chargement)&nbsp;<\/span><\/b><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\">V\u00e9rifiez que le cas de charge s\u00e9lectionn\u00e9 est correct.<\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\">Cliquez sur le type de charge \u00e0 attribuer aux pannes. <\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\">Saisissez la valeur de charge souhait\u00e9e.<\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\">Cliquez sur une ou plusieurs pannes. Pour attribuer le chargement \u00e0 plusieurs pannes, cliquez et faites glisser une fen\u00eatre de s\u00e9lection. <\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\">Cliquez sur \u00ab OK \u00bb pour fermer la bo\u00eete de dialogue.&nbsp;<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n<h1 class=\"toc_anchors\" id=\"Do_purlins_effect_the_design_braced__buckling_length_of_supporting_member_\"><span class=\"colour\">Les pannes influencent-elles la longueur de flambement et de d\u00e9versement de calcul de l&rsquo;\u00e9l\u00e9ment porteur ?&nbsp;<\/span><span class=\"colour\"><br \/><\/span><\/h1>\n<div><span class=\"colour\">Par d\u00e9faut, les pannes r\u00e9duisent la longueur de flambement mineure Ly et la longueur de d\u00e9versement (LTB) de l&rsquo;\u00e9l\u00e9ment porteur, g\u00e9n\u00e9ralement la membrure sup\u00e9rieure d&rsquo;un treillis ou d&rsquo;une poutre.&nbsp;<\/span><\/div>\n<div><span><span class=\"colour\">Vous pouvez toutefois modifier cette option dans <\/span><\/span><b><span class=\"colour\">Centre de param\u00e8tres &gt; Param\u00e8tres acier &gt; Param\u00e8tres des \u00e9l\u00e9ments &gt; Calcul des poutres &gt; <\/span><\/b><span class=\"colour\">cochez \/ d\u00e9cochez<\/span><b><span class=\"colour\"> \u00ab Autoriser les pannes \u00e0 r\u00e9duire la longueur de d\u00e9versement (LTB) \u00bb<\/span><\/b><span class=\"colour\">.<\/span><span class=\"colour\"><br \/><\/span><\/div>\n<div><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-2e2e0f5135ad810681509fa854ba268b.png\" style=\"max-width: 100%;height: auto;padding: 0\"><\/div>\n<div><b><\/b><\/div>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>D\u00e9finir de nouvelles pannes Avant d&rsquo;ins\u00e9rer des pannes, les treillis, poutres ou \u00e9l\u00e9ments de portique m\u00e9tallique doivent \u00eatre d\u00e9finis.&nbsp; Pour d\u00e9finir des pannes : &nbsp;Cliquez&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"template":"","meta":{"_whitepaper_youtube_videos":"","_whitepaper_youtube_url":"","_whitepaper_youtube_thumbnail":"","footnotes":""},"categories":[48],"whitepaper_topic":[],"whitepaper_product":[],"whitepaper_type":[],"class_list":["post-2305","wiki","type-wiki","status-publish","hentry","category-structural-modelling"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.9 (Yoast SEO v27.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Utilisation des pannes<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez comment d\u00e9finir, calculer et d\u00e9tailler les pannes dans ProtaStructure pour vos projets de charpentes m\u00e9talliques et structures mixtes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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