{"id":3618,"date":"2024-07-12T09:18:38","date_gmt":"2024-07-12T09:18:38","guid":{"rendered":"https:\/\/www.buildsoft.eu\/?post_type=reference-project&#038;p=3618"},"modified":"2026-07-28T11:41:30","modified_gmt":"2026-07-28T11:41:30","slug":"gtc-spiral-stairs","status":"publish","type":"reference-project","link":"https:\/\/www.buildsoft.eu\/en\/reference-projects\/gtc-spiral-stairs\/","title":{"rendered":"GTC Spiral Stairs"},"content":{"rendered":"\n<p>This spiral staircase in Almere has a floor plan proportioned according to the golden ratio, following a Fibonacci spiral, and stands slightly over 4.5 metres high with a 2.5-metre width.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The project<\/h2>\n\n\n\n<p>The floor plan of this spiral staircase has proportions according to the golden ratio or the Fibonacci spiral. The staircase is slightly more than 4.5 meters high and 2.5 meters wide.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"FAQ\">FAQ<\/h2>\n\n\n<div class=\"wp-block-uagb-faq uagb-faq__outer-wrap uagb-block-fe71c529 uagb-faq-icon-row uagb-faq-layout-accordion uagb-faq-expand-first-true uagb-faq-inactive-other-true uagb-faq__wrap uagb-buttons-layout-wrap uagb-faq-equal-height     \" data-faqtoggle=\"true\" role=\"tablist\"><script type=\"application\/ld+json\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"FAQPage\",\"@id\":\"https:\\\/\\\/www.buildsoft.eu\\\/en\\\/reference-projects\\\/gtc-spiral-stairs\\\/\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Why base a spiral staircase's floor plan on the golden ratio or a Fibonacci spiral?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Fibonacci spiral is built from quarter-circle arcs whose radii grow according to the golden ratio, which produces a curve that widens smoothly and consistently at every point rather than at an arbitrary or uneven rate. Using that same proportioning for a spiral staircase's floor plan gives each step a visually balanced, gradually widening tread from the centre outward, which is why the golden ratio shows up so often in spiral stair designs where both structural geometry and visual proportion matter.\"}}]}<\/script><div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-09dad7e6 \" role=\"tab\" tabindex=\"0\"><div class=\"uagb-faq-questions-button uagb-faq-questions\">\t\t\t<span class=\"uagb-icon uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"uagb-icon-active uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t<span class=\"uagb-question\">Why base a spiral staircase&#8217;s floor plan on the golden ratio or a Fibonacci spiral?<\/span><\/div><div class=\"uagb-faq-content\"><p>Fibonacci spiral is built from quarter-circle arcs whose radii grow according to the golden ratio, which produces a curve that widens smoothly and consistently at every point rather than at an arbitrary or uneven rate. Using that same proportioning for a spiral staircase&#8217;s floor plan gives each step a visually balanced, gradually widening tread from the centre outward, which is why the golden ratio shows up so often in spiral stair designs where both structural geometry and visual proportion matter.<\/p><\/div><\/div><\/div>","protected":false},"author":6,"template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","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":"","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-4)","background-image":"","background-repeat":"repeat","background-position":"center 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