{"id":18138,"date":"2026-05-01T10:27:10","date_gmt":"2026-05-01T04:57:10","guid":{"rendered":"https:\/\/aluminiummagazine.com\/mag\/?p=18138"},"modified":"2026-05-01T10:28:58","modified_gmt":"2026-05-01T04:58:58","slug":"curtain-wall-wind-load-water-drainage-system-guide","status":"publish","type":"post","link":"https:\/\/aluminiummagazine.com\/mag\/aluminium\/facade\/curtain-wall-wind-load-water-drainage-system-guide.html","title":{"rendered":"Do You Know? How Curtain Wall Systems Handle Wind Load &amp; Water Drainage"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Curtain walls are the unsung heroes of modern skyscrapers. They are lightweight, visually stunning, and engineered to withstand immense forces from nature. But two critical performance challenges define a successful curtain wall: <strong>wind load resistance<\/strong> and <strong>water drainage management<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A failure in either can lead to catastrophic glass blowouts or annoying, destructive leaks. So, how do stick and unitized systems handle these challenges? Let&#8217;s break down the physics, engineering, and hidden design features that keep buildings dry and intact.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How Curtain Walls Resist Wind Load<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Wind exerts tremendous pressure on tall buildings \u2014 often <strong>hundreds of tons of force<\/strong>. A curtain wall must transfer these loads to the building&#8217;s structural frame without excessive deflection or failure.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">The Load Path: From Glass to Structure<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Every curtain wall follows a simple load path:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Wind hits the glass<\/strong> \u2192 pressure is applied to the glass pane.<\/li>\n\n\n\n<li><strong>Glass transfers load<\/strong> to the framing members (mullions\/transoms) via setting blocks and gaskets.<\/li>\n\n\n\n<li><strong>Framing transfers load<\/strong> through anchor brackets to the <strong>slab edge or spandrel beam<\/strong> of the building.<\/li>\n\n\n\n<li><strong>Building structure<\/strong> (columns, floors, shear walls) absorbs and dissipates the load into the ground.<\/li>\n<\/ol>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Key Engineering Factors<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Factor<\/th><th>Stick System<\/th><th>Unitized System<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Mullion Depth<\/strong><\/td><td>Typically 50\u2013200 mm<\/td><td>50\u2013200 mm (similar)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Alloy Grade<\/strong><\/td><td>6063-T5 or T6 (extrusion)<\/td><td>6063-T6 or 6061-T6 for higher strength<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Anchor Type<\/strong><\/td><td>Two-piece adjustable brackets<\/td><td>Heavy-duty interlocking anchors<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Deflection Limit<\/strong><\/td><td>L\/175 or L\/200 of span (approx. 10\u201320 mm)<\/td><td>Same, often tighter (L\/250)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Wind Load Testing<\/strong><\/td><td>ASTM E330 (air pressure)<\/td><td>ASTM E330 + seismic movement test<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">How Unitized Systems Excel at High Winds<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Unitized systems have a structural advantage: <strong>the interlocking male-female mullions<\/strong> act as continuous splines. When panels are stacked and side-joined, they create a <em>redundant load-sharing mechanism<\/em>. Wind load on one panel is partially distributed to adjacent panels, reducing peak stress on any single anchor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is why unitized walls can achieve <strong>wind load ratings up to \u00b14000 Pa<\/strong> (approx. 83 psf) \u2014 enough for supertall towers in cyclone-prone regions.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\ud83d\udca1 <strong>Pro Tip:<\/strong> Always ask for a <strong>full-scale mock-up test<\/strong> (ASTM E330 + seismic racking) for any project over 20 stories. Mock-ups reveal weak points no calculation can catch.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">For a deeper dive into structural grades and standards, visit our guide on <strong><a href=\"https:\/\/aluminiummagazine.com\/mag\/aluminium\/global-standards-astm-aama-en-din-bs.html\">global aluminium standards: ASTM, AAMA, EN, DIN, BS<\/a><\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/05\/curtain-wall-wind-load-water-drainage-1024x576.webp\" alt=\"Technical cross-section diagram showing wind load transfer through mullions to building structure and water drainage path through pressure-equalized cavity and weep holes.\" class=\"wp-image-18140\" srcset=\"https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/05\/curtain-wall-wind-load-water-drainage-1024x576.webp 1024w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/05\/curtain-wall-wind-load-water-drainage-300x169.webp 300w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/05\/curtain-wall-wind-load-water-drainage-768x432.webp 768w, https:\/\/aluminiummagazine.com\/mag\/wp-content\/uploads\/2026\/05\/curtain-wall-wind-load-water-drainage.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>Curtain walls manage wind pressure by transferring loads to the structure and handle water using a pressure-equalized cavity with weep holes \u2014 never relying on perfect sealing.<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How Curtain Walls Manage Water Drainage<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Water is the enemy of building envelopes. A curtain wall must keep rain out while handling condensation, pressure differences, and capillary action. The solution is a multi-stage <strong>pressure-equalized rain screen<\/strong> system.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">The Science: Pressure Equalization<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A curtain wall is not perfectly sealed \u2014 it can&#8217;t be, because thermal expansion and building movement would break rigid seals. Instead, engineers use a clever trick:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Outer seals<\/strong> (primary weather gaskets) block most water.<\/li>\n\n\n\n<li>A small amount of water may bypass the outer seal.<\/li>\n\n\n\n<li>This water enters a <strong>cavity<\/strong> (the &#8220;drainage chamber&#8221;).<\/li>\n\n\n\n<li>The cavity is vented to the exterior via <strong>weep holes<\/strong>.<\/li>\n\n\n\n<li>When wind blows, the pressure inside the cavity <strong>equalizes<\/strong> with outside pressure. No pressure difference = no force pushing water through the inner seal.<\/li>\n\n\n\n<li>Gravity then carries captured water down the cavity and out through weeps at the sill.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This is called a <strong>pressure-equalized, drained, and ventilated curtain wall<\/strong>. It&#8217;s the industry standard for high-performance facades.<\/p>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Water Drainage in Stick vs. Unitized<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Feature<\/th><th class=\"has-text-align-center\" data-align=\"center\">Stick System<\/th><th>Unitized System<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Primary Seal<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Face gasket or wet sealant<\/td><td>Pre-compressed foam or EPDM gaskets<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Cavity<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Continuous vertical and horizontal gutters<\/td><td>Integrated in each module with cross-drains<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Weep Holes<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Drilled or punched at transoms<\/td><td>Precision-molded or machined<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Drainage Path<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Gravity down mullions<\/td><td>Module-to-module via jump seals or tubes<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Testing Standard<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">ASTM E1105 (water penetration)<\/td><td>Same + AAMA 501.2 (leakage)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Where Unitized Systems Shine (and Fail)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Unitized systems have <strong>factory-installed gaskets<\/strong> and pre-drilled weep paths, which are more reliable than field-applied sealants. However, if the <strong>inter-module jump seals<\/strong> (horizontal or vertical connections) are poorly designed or damaged, water can migrate between modules and cause hidden leaks.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The most common failure point: <strong>clogged weep holes<\/strong> from construction dust or insect nests. Regular maintenance and removable weep covers are essential.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For an in-depth look at glass types that work best with these drainage systems, check out our article on <strong><a href=\"https:\/\/aluminiummagazine.com\/mag\/glass\/types-of-glass-aluminium-doors-windows.html\">types of glass for aluminium doors and windows<\/a><\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Testing: How We Know It Works<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before any curtain wall is approved, it undergoes rigorous testing. The three most important standards:<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Test<\/th><th>What It Measures<\/th><th>Acceptance Criteria<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>ASTM E330<\/strong><\/td><td>Structural wind load resistance<\/td><td>No permanent deformation at 1.5\u00d7 design pressure<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>ASTM E283<\/strong><\/td><td>Air infiltration<\/td><td>Less than 0.06 cfm\/ft\u00b2 at 75 Pa<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>ASTM E1105 \/ AAMA 501.2<\/strong><\/td><td>Water penetration under dynamic pressure<\/td><td>No uncontrolled water entry after 15 minutes of spray + cyclic wind<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>full-scale mock-up<\/strong> is built on a test stand and subjected to these tests. Engineers also add <strong>seismic racking<\/strong> (cyclic movement) to simulate earthquakes or building sway.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;re considering a career in this field, understanding testing and commissioning is key. Explore our <strong><a href=\"https:\/\/aluminiummagazine.com\/mag\/aluminium-careers\/facade-glazing-jobs-salaries-skills-roadmap.html\">facade glazing jobs, salaries, and skills roadmap<\/a><\/strong> for more insights.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Real-World Failure Examples (And How to Avoid Them)<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Hurricane-force winds in Miami (2017)<\/strong> \u2013 A unitized wall failed because the pressure equalization chamber was not vented properly, causing <strong>hydrostatic pressure<\/strong> (the weight of pooled water pushing itself through seals) to blow out inner gaskets. <strong>Fix:<\/strong> Always verify weep hole placement and vent sizing per AAMA TIR-A11.<\/li>\n\n\n\n<li><strong>Leaking stick-built wall in Seattle (2019)<\/strong> \u2013 Field-applied sealant cracked after one winter freeze-thaw cycle. <strong>Fix:<\/strong> Use pre-compressed foam gaskets instead of wet sealants in high-rain, freeze-thaw climates.<\/li>\n\n\n\n<li><strong>Module joint leak in Singapore high-rise<\/strong> \u2013 Jump seals were missing horizontal weeps, so water pooled and migrated inward. <strong>Fix:<\/strong> Specify cross-drain tubes or integrated drip edges on every module.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">To understand basic facade terminology before diving into these technical fixes, read our introduction to <strong><a href=\"https:\/\/aluminiummagazine.com\/mag\/aluminium\/facade\/facade-meaning-definition-modern-buildings-guide.html\">facade meaning and definition<\/a><\/strong>.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Best Practices for Architects and Engineers<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>For high-wind zones<\/strong> (typhoon\/hurricane regions): Specify unitized with 200mm+ mullion depth, 6061-T6 alloy, and dynamic water testing (AAMA 501.2).<\/li>\n\n\n\n<li><strong>For high-rain zones<\/strong> (tropical monsoon): Use dual drainage cavities with independent weeps and oversized scuppers.<\/li>\n\n\n\n<li><strong>For seismic zones<\/strong> (California, Japan, Turkey): Require two-axis seismic racking test (ASTM E2126) with interlocking unitized connectors that allow <strong>\u00b150mm movement<\/strong> (some advanced systems are engineered for even greater <strong>inter-story drift<\/strong> \u2014 up to \u00b175mm or more \u2014 to accommodate the highest seismicity in Tokyo or San Francisco).<\/li>\n\n\n\n<li><strong>For cold climates<\/strong> (Canada, Russia): Specify heated mullions or weep hole de-icing cables to prevent ice dams blocking drainage.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Curtain wall performance directly impacts building energy efficiency. Learn more about <strong><a href=\"https:\/\/aluminiummagazine.com\/mag\/efficiency\/energy-saving-thermal-break-aluminium-windows-benefits.html\">thermal break aluminium windows and their energy savings<\/a><\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Frequently Asked Questions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Can a curtain wall ever be 100% watertight?<\/strong><br>A: No. All curtain walls are designed to be &#8220;weeped and drained&#8221; \u2014 they expect some water entry but manage it safely. &#8220;Dry&#8221; systems (fully sealed) exist but are rare and expensive; they rely on perfect installation and never move.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: How often should weep holes be inspected?<\/strong><br>A: Annually for low-rise, biannually for high-rise. Construction debris, dirt, and insects are common blockers.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: What&#8217;s the maximum wind load a typical curtain wall can handle?<\/strong><br>A: Most quality systems are rated for \u00b12400 Pa (\u00b150 psf). Special high-wind systems go to \u00b14000 Pa (\u00b183 psf). Ask for a project-specific calculation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Does a unitized system always outperform stick in water drainage?<\/strong><br>A: Not automatically. A poorly designed unitized system with misaligned jump seals can leak worse than a well-installed stick system with continuous gaskets. The key is <strong>factory quality + proper inter-module detailing<\/strong>.<\/p><script>document.addEventListener(\"DOMContentLoaded\",function(){\n        if(window.innerWidth <= 768){\n            if (\"immediate\" === \"delay\") {\n                setTimeout(function(){document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\")},0);\n            } else if (\"immediate\" === \"scroll\") {\n                window.addEventListener(\"scroll\",function(){\n                    let s=window.scrollY\/(document.body.scrollHeight-window.innerHeight);\n                    if(s>0.1){\n                        document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\");\n                    }\n                });\n            } else {\n                document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\");\n            }\n        } else {\n            document.querySelectorAll(\".pai-ad\").forEach(el=>el.remove());\n        }\n    });<\/script>","protected":false},"excerpt":{"rendered":"<p>Curtain walls are the unsung heroes of modern skyscrapers. They are lightweight, visually stunning, and engineered to withstand immense forces from nature. But two critical performance challenges define a successful curtain wall: wind load resistance and water drainage management. A failure in either can lead to catastrophic glass blowouts or annoying, destructive leaks. So, how &#8230; <a title=\"Do You Know? How Curtain Wall Systems Handle Wind Load &amp; Water Drainage\" class=\"read-more\" href=\"https:\/\/aluminiummagazine.com\/mag\/aluminium\/facade\/curtain-wall-wind-load-water-drainage-system-guide.html\" aria-label=\"Read more about Do You Know? How Curtain Wall Systems Handle Wind Load &amp; Water Drainage\">Read more<\/a><\/p>\n","protected":false},"author":12,"featured_media":18139,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4156],"tags":[4157,4158],"class_list":["post-18138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-facade","tag-curtain-wall","tag-facade"],"_links":{"self":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/18138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/comments?post=18138"}],"version-history":[{"count":1,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/18138\/revisions"}],"predecessor-version":[{"id":18141,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/18138\/revisions\/18141"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/media\/18139"}],"wp:attachment":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/media?parent=18138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/categories?post=18138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/tags?post=18138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}