{"id":4147,"date":"2026-09-07T20:20:00","date_gmt":"2026-09-07T12:20:00","guid":{"rendered":"https:\/\/ksnrsolar.com\/wind-load-calculation-solar-racking\/"},"modified":"2026-09-07T20:20:00","modified_gmt":"2026-09-07T12:20:00","slug":"wind-load-calculation-solar-racking","status":"publish","type":"post","link":"https:\/\/ksnrsolar.com\/fr\/wind-load-calculation-solar-racking\/","title":{"rendered":"Calcul de la charge du vent et de la r\u00e9sistance \u00e0 l&#039;arrachement pour les syst\u00e8mes de montage solaire"},"content":{"rendered":"<style>\n.el-sec{background:#fff;border-radius:8px;box-shadow:0 1px 4px rgba(20,40,80,.08);padding:34px 42px;margin:0 auto 22px;max-width:1020px;box-sizing:border-box}\n.el-h{color:#1E293B;margin:0 0 14px}\nh2.el-h{font-size:26px;text-align:center;border-left:none;padding-left:0;line-height:1.3;margin-bottom:22px}\nh2.el-h::after{content:'';display:block;width:60px;height:3px;background:#F9960E;margin:12px auto 0;border-radius:2px}\nh3.el-h{font-size:19px}\n.el-hero{padding:0;overflow:hidden}\n.el-overlay{padding:48px 38px;text-align:center}\n.el-overlay .el-check{display:inline-block;text-align:left}\n.el-row{display:flex;gap:16px;align-items:stretch;flex-wrap:wrap}\n.el-col{background:#F0F5FA;border:1px solid #D1D5DB;border-radius:6px;padding:16px 18px;box-sizing:border-box}\n.el-col>.el-sec{margin:0;height:100%;box-shadow:none;background:#fff}\n.el-col>.el-sec .el-btn{white-space:nowrap}\n.el-btn{display:inline-block;background:#0097B4;color:#fff !important;padding:10px 26px;border-radius:5px;text-decoration:none;font-weight:600;font-size:15px}\n.el-check{list-style:none;margin:10px 0;padding:0}\n.el-check li{padding:5px 0 5px 26px;position:relative}\n.el-check li::before{content:'\u2713';position:absolute;left:2px;color:#1E8A5F;font-weight:700}\n.el-box{background:#F0F5FA;border:1px solid #D1D5DB;border-radius:6px;padding:16px 18px;margin:8px 0}\n.el-box-icon{font-size:24px;margin-bottom:6px}\n.el-box h4{color:#1E293B;margin:0 0 6px;font-size:16px}\n.el-box p{font-size:14px;color:#334155;margin:0}\n.el-acc details{border:1px solid #D1D5DB;border-radius:6px;margin:0 0 10px;background:#F9FAFB}\n.el-acc summary{padding:13px 18px;cursor:pointer;font-weight:600;color:#1E293B}\n.acc-body{padding:4px 18px 14px;font-size:14.5px;color:#334155}\n.el-cta{text-align:center}\n.el-cta .el-h{color:#fff;border-left:none;padding-left:0}\n.el-cta .el-btn{background:#1E293B}.el-cta .el-text{color:#fff}.el-cta .el-text p{color:rgba(255,255,255,.92)}\n.el-sec table{width:100%;border-collapse:collapse;margin:12px 0;font-size:14.5px}\n.el-sec th,.el-sec td{border:1px solid #D1D5DB;padding:9px 12px;text-align:left;vertical-align:top}\n.el-sec th{background:#F0F5FA;color:#1E293B}\n.el-sec tr:nth-child(even) td{background:#F9FAFB}\n.el-text p{margin:0 0 10px}\n.el-text ul{margin:0 0 10px 22px}\n.el-text a{color:#0097B4}\n.el-band{background:#F0F5FA;border-radius:8px;max-width:1020px;margin:0 auto 22px;padding:18px 30px;font-size:15px;box-sizing:border-box}\n.el-band p{margin:0}\n.el-media{display:flex;gap:30px;align-items:center}\n.el-media.rev{flex-direction:row-reverse}\n.el-media-txt{flex:1.15;min-width:0}\n.el-media-img{flex:1;min-width:0}\n.el-media-img img{width:100%;height:auto;display:block;border-radius:8px;box-shadow:0 2px 10px rgba(20,40,80,.14)}\nul.el-two{column-count:2;column-gap:44px}\nul.el-two li{break-inside:avoid}\n@media (max-width:767px){.el-row{flex-direction:column}.el-col{flex:none !important;max-width:100% !important}.el-sec{padding:22px 18px}.el-overlay{padding:32px 20px}.el-media,.el-media.rev{flex-direction:column;align-items:stretch}ul.el-two{column-count:1}.el-band{padding:14px 18px}}\n.el-btn:hover{background:#F9960E}\n<\/style>\n<section class=\"el-sec el-hero\" style=\"background-image:url(\/wp-content\/uploads\/2026\/09\/ps-sub-ps-07-1-a-1.jpg);background-size:cover;background-position:center;\">\n<div class=\"el-overlay\" style=\"background:rgba(255,255,255,0.84);\">\n<h2 class=\"el-h\">Calcul de la charge du vent et de la r\u00e9sistance \u00e0 l&#039;arrachement pour les syst\u00e8mes de montage solaire<\/h2>\n<div class=\"el-text\">\n<p>Wind, not gravity, sizes most solar racking. The structure carries the module weight easily; what decides its steel content is the uplift that tries to lift the array off its foundations and the lateral load that tries to push it over. Both are calculated, and both depend on parameters that are frequently left implicit in a quotation.<\/p>\n<p>Wind load is not one number. It varies across the site with terrain, changes with height above ground, is amplified at the edges and corners of an array, and depends on the array geometry through the pressure coefficients. A design that applies a single uniform pressure across a large array is either wasteful at the centre or unsafe at the perimeter.<\/p>\n<\/div>\n<p><a class=\"el-btn\" href=\"\/fr\/contact-us\/#contactpopupform\">Demander un devis<\/a><\/div>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Pourquoi c&#039;est difficile<\/h2>\n<div class=\"el-text\">\n<p>The parameters that decide wind load are known, and disputes on solar projects are almost never about the calculation method. They are about which parameter values were used.<\/p>\n<\/div>\n<ul class=\"el-check\">\n<li>Terrain category and exposure change the basic wind speed substantially, so the same site classified two ways produces two different structures<\/li>\n<li>Uplift at array edges and corners can be two to three times the interior value, which makes zone-based fixing density the governing cost driver<\/li>\n<li>Module gap, tilt angle and array height all affect the pressure coefficients, so a layout change invalidates a load calculation<\/li>\n<li>Return period and risk category follow from the project classification, and getting that wrong is a compliance exposure rather than cost exposure<\/li>\n<li>Foundation capacity is usually governed by uplift rather than compression, so wind load determines pile depth as much as structure weight does<\/li>\n<li>Snow and wind can act together in some codes, and the combination is frequently overlooked in warmer climate projects<\/li>\n<\/ul>\n<\/section>\n<section class=\"el-sec\">\n<div class=\"el-media rev\">\n<div class=\"el-media-txt\">\n<h3 class=\"el-h\">Exigences d&#039;ing\u00e9nierie<\/h3>\n<div class=\"el-text\">\n<p>These are the inputs we require to produce a defensible wind load calculation.<\/p>\n<\/div>\n<ul class=\"el-check\">\n<li>Basic wind speed for the site with the source stated, together with the return period the project requires<\/li>\n<li>Terrain category or exposure classification, including how it changes across the site boundary<\/li>\n<li>Array geometry: module tilt, row pitch, array height above grade, module dimensions and the gaps between modules<\/li>\n<li>Site topography: escarpments, hills, ridges and any feature that produces local wind speed-up<\/li>\n<li>Risk category or consequence class, with the code edition referenced in the project jurisdiction<\/li>\n<li>Whether the design will be based on a code calculation or a wind tunnel study, and for which configuration<\/li>\n<\/ul>\n<\/div>\n<div class=\"el-media-img\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/09\/ps-sub-ps-07-1-b-1.jpg\" alt=\"Wind Load Calculation &#038; Uplift Resistance for Solar Racking - installation detail\" loading=\"lazy\"><\/div>\n<\/div>\n<\/section>\n<section class=\"el-band\">\n<p>Selection guidance: state the terrain category and the return period explicitly in the specification. Most wind load disputes on solar projects are disagreements about these two values rather than about the calculation.<\/p>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Comment nous r\u00e9solvons le probl\u00e8me<\/h2>\n<ul class=\"el-check\">\n<li>Zone-based uplift design, with interior, edge and corner zones calculated separately and fixing density stepped accordingly<\/li>\n<li>Terrain and topographic factors applied site-specifically, including local features that raise wind speed above the regional value<\/li>\n<li>Array height and module gap incorporated into the pressure coefficients rather than treated as constants<\/li>\n<li>Foundation uplift capacity designed against the calculated tension, so pile depth is driven by wind rather than by habit<\/li>\n<li>Combination load cases checked, including wind acting with snow or with seismic where the code requires it<\/li>\n<li>Calculation report issued with every structure package, stating the parameters used so a reviewer can reproduce the result<\/li>\n<\/ul>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Au-del\u00e0 de la structure<\/h2>\n<ul class=\"el-check el-two\">\n<li>Sensitivity analysis on the governing parameters, so the buyer can see which input moves cost most before it is fixed<\/li>\n<li>Layout support: where a design is marginal, small changes to array height or row geometry often recover compliance more cheaply than added steel<\/li>\n<\/ul>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Points de r\u00e9f\u00e9rence<\/h2>\n<div class=\"el-text\">\n<p>Les projets de r\u00e9f\u00e9rence ci-dessous, de type et d&#039;envergure comparables et document\u00e9s publiquement, sont cit\u00e9s \u00e0 titre d&#039;illustration des pratiques d&#039;ing\u00e9nierie. Ils ne constituent pas un historique de r\u00e9alisations.<\/p>\n<\/div>\n<ul class=\"el-check\">\n<li>A 200 MW project in the Philippines where a topographic speed-up factor at an escarpment required a foundation revision on one portion of the site only.<\/li>\n<li>A 250 MW site in the United States where zone-based uplift design reduced ballast and pile depth in the interior compared with a uniform-pressure approach.<\/li>\n<li>A 150 MW project in Turkey where the terrain category was reclassified after a site visit, changing the basic wind speed and the governing load case.<\/li>\n<\/ul>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Normes et conformit\u00e9<\/h2>\n<ul class=\"el-check el-two\">\n<li>Cas de charge neige et glace EN 1991-1-3 \/ ASCE 7 adapt\u00e9s \u00e0 votre p\u00e9riode de retour nominale<\/li>\n<li>Compatibilit\u00e9 avec les normes IEC 61215 et IEC 61730 pour la zone de serrage des modules et le cadre<\/li>\n<li>Classes d&#039;ex\u00e9cution de la charpente m\u00e9tallique EN 1090 \/ AISC avec dossiers de qualification des proc\u00e9dures de soudage<\/li>\n<li>galvanisation ISO 1461, syst\u00e8mes de peinture ISO 12944 avec rev\u00eatement duplex sp\u00e9cifi\u00e9<\/li>\n<li>Gestion de la qualit\u00e9 de la production selon la norme ISO 9001, tra\u00e7abilit\u00e9 des lots par num\u00e9ro de coul\u00e9e<\/li>\n<li>Assistance en mati\u00e8re de code du b\u00e2timent local et de documentation relative aux permis pour votre juridiction<\/li>\n<\/ul>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Assurance qualit\u00e9<\/h2>\n<div class=\"el-text\">\n<p>La documentation relative \u00e0 chaque lot comprend des certificats d&#039;usine tra\u00e7ables par num\u00e9ro de coul\u00e9e, des rapports de galvanisation avec mesure de l&#039;\u00e9paisseur du rev\u00eatement, des rapports de contr\u00f4le dimensionnel des gabarits de pr\u00e9-assemblage et la tra\u00e7abilit\u00e9 des lots de quincaillerie. La garantie couvre les cas de charge et les classes d&#039;exposition environnementale sp\u00e9cifi\u00e9s\u00a0; les r\u00e9clamations sont donc r\u00e9gl\u00e9es sur la base de donn\u00e9es et non par n\u00e9gociation.<\/p>\n<\/div>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Documents que vous recevez<\/h2>\n<div class=\"el-text\">\n<p>Chaque envoi comprend un dossier documentaire conforme \u00e0 votre registre d&#039;actifs\u00a0: rapports d&#039;essais de mat\u00e9riaux certifi\u00e9s, relev\u00e9s d&#039;\u00e9paisseur de rev\u00eatement par lot, fiches de v\u00e9rification du couple et de la pr\u00e9charge, listes de colisage avec num\u00e9ros de conteneur et un jeu de plans utiles \u00e0 la maintenance. Lorsque le march\u00e9 de destination exige une certification locale ou des documents traduits, nous les pr\u00e9parons en amont, et non au port.<\/p>\n<\/div>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Planification de la dur\u00e9e de vie et de la maintenance<\/h2>\n<div class=\"el-text\">\n<p>La rentabilit\u00e9 des syst\u00e8mes de montage est d\u00e9termin\u00e9e \u00e0 la huiti\u00e8me ann\u00e9e, et non \u00e0 la signature du contrat. Le poids de la galvanisation, la classe de rev\u00eatement des fixations et la protection des bords d\u00e9terminent si l&#039;inspection de la huiti\u00e8me ann\u00e9e r\u00e9v\u00e8le des fixations bien serr\u00e9es ou des traces de rouille. Nous publions les intervalles de premi\u00e8re maintenance pr\u00e9vus par classe environnementale et les \u00e9tayons par des donn\u00e9es de rev\u00eatement par lot, ce qui permet de fonder les discussions relatives \u00e0 la garantie sur des donn\u00e9es concr\u00e8tes.<\/p>\n<\/div>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Consid\u00e9rations relatives aux co\u00fbts et au commerce<\/h2>\n<ul class=\"el-check\">\n<li>Wind load is the largest single driver of steel content in a ground-mount structure, and its effect is non-linear in high wind zones<\/li>\n<li>Zone-based design costs slightly more engineering time and typically saves more in steel and foundation than the engineering costs<\/li>\n<li>Wind tunnel testing carries a real cost but frequently recovers more tonnage than it costs on large arrays in marginal wind zones<\/li>\n<li>Terrain reclassification after a site visit occasionally moves a project between design categories and changes the budget materially<\/li>\n<li>Under-specifying the load case is not a saving, it is a contingency that surfaces as a compliance problem at permitting or lender review<\/li>\n<\/ul>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Foire aux questions<\/h2>\n<div class=\"el-acc\">\n<details>\n<summary>Why do the edges of an array need more steel than the centre?<\/summary>\n<div class=\"acc-body\">Because the pressure coefficients are higher there. Wind flowing over an array accelerates at the leading edge and separates at corners, producing local uplift that can be two to three times the interior value. Since foundations and fixings are sized by uplift, the perimeter zones govern the design. Applying interior values at the edge is the most common under-design error in solar racking.<\/div>\n<\/details>\n<details>\n<summary>Does terrain category really change the design?<\/summary>\n<div class=\"acc-body\">Substantially. Terrain category or exposure describes the surface roughness upwind of the site, which determines how much the wind decelerates before reaching the array. An open coastal site or one with a long flat fetch carries a much higher basic wind speed at array height than a site sheltered by terrain or vegetation. Because load varies with the square of the speed, the structural consequence of reclassifying terrain is large.<\/div>\n<\/details>\n<details>\n<summary>When is a wind tunnel study justified?<\/summary>\n<div class=\"acc-body\">Usually when the array is large, the site is in a marginal or high wind zone, or the configuration is unusual enough that code pressure coefficients are a poor fit. A study produces more accurate coefficients, which can reduce tonnage and foundation depth considerably. On projects where structure cost is significant relative to capex, the study frequently pays for itself before the first pile is installed.<\/div>\n<\/details>\n<details>\n<summary>What load case governs the foundation?<\/summary>\n<div class=\"acc-body\">Uplift usually governs rather than compression. Gravity loads are modest for a solar array, while wind uplift acts on every pile in tension and is amplified at the perimeter. That is why pile depth and embedment are often driven by tension capacity rather than by the weight the structure carries, and why a design that only checks compression is incomplete.<\/div>\n<\/details>\n<details>\n<summary>Can a layout change invalidate the calculation?<\/summary>\n<div class=\"acc-body\">Yes, if it changes array height, tilt, module gap or row pitch, because those parameters feed the pressure coefficients. It does not invalidate the method, only the inputs. On active projects the practical approach is to fix the array geometry early and treat later changes as a design revision with a documented recalculation, rather than assuming the original numbers still apply.<\/div>\n<\/details>\n<\/div>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Guides et pages d&#039;application associ\u00e9s<\/h2>\n<div class=\"el-text\">\n<p>Poursuivez avec les pages les plus proches de votre type de projet.<\/p>\n<\/div>\n<ul class=\"el-two\">\n<li><a href=\"\/fr\/structural-load-engineering\/\">Structural Load, Wind &#038; Snow Engineering<\/a> \u2013 Aper\u00e7u du groupe pour cette gamme<\/li>\n<li><a href=\"\/fr\/snow-load-design-solar-structure\/\">Snow Load Design for Solar Mounting Structures<\/a><\/li>\n<li><a href=\"\/fr\/wind-tunnel-testing-aeroelastic\/\">Essais en soufflerie et stabilit\u00e9 a\u00e9ro\u00e9lastique<\/a><\/li>\n<li><a href=\"\/fr\/harsh-environment-applications\/\">Harsh Environment Applications<\/a><\/li>\n<li><a href=\"\/fr\/offshore-solar-projects\/\">Offshore, Nearshore &#038; Marine Solar Projects<\/a><\/li>\n<li><a href=\"\/fr\/mountain-solar-projects\/\">Mountain &#038; Steep-Terrain Solar Projects<\/a><\/li>\n<\/ul>\n<\/section>\n<section class=\"el-sec\">\n<h2 class=\"el-h\">Ce que nous devons citer<\/h2>\n<ul class=\"el-check el-two\">\n<li>Site coordinates or a location plan, with any topographic features and their approximate height<\/li>\n<li>Basic wind speed requirement and the code edition applicable in the project jurisdiction<\/li>\n<li>Terrain classification and how the site surroundings are classified<\/li>\n<li>Array geometry: tilt, module size, row pitch, array height and module gap<\/li>\n<\/ul>\n<\/section>\n<section class=\"el-sec el-cta\" style=\"background-color:#1E293B;\">\n<h2 class=\"el-h\">Parlez \u00e0 un ing\u00e9nieur en structure<\/h2>\n<div class=\"el-text\">\n<p>Send the site location and the array geometry, and we will return a wind load basis stating the parameters used, a zoned uplift map and the fixing density implied for each zone.<\/p>\n<\/div>\n<p><a class=\"el-btn\" href=\"\/fr\/contact-us\/#contactpopupform\">Obtenez un devis rapide<\/a><\/section>","protected":false},"excerpt":{"rendered":"<p>Wind load calculation racking guide: which configuration fits, what drives cost per watt, and which quality evidence to demand before you buy.<\/p>","protected":false},"author":1,"featured_media":3570,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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