{"id":17786,"date":"2026-11-07T21:05:42","date_gmt":"2026-11-07T20:05:42","guid":{"rendered":"https:\/\/ventsystems.de\/lexikon\/gelaendekategorie\/"},"modified":"2026-11-07T21:05:42","modified_gmt":"2026-11-07T20:05:42","slug":"gelaendekategorie","status":"publish","type":"page","link":"https:\/\/ventsystems.de\/en\/lexikon\/gelaendekategorie\/","title":{"rendered":"Terrain category"},"content":{"rendered":"<p class=\"wp-block-paragraph\">The <strong>Terrain category<\/strong> describes how rough the surroundings of a building are. Over open sea or flat land the wind blows unhindered; in towns and forests buildings and trees slow it down near the ground.<\/p>\n\n\n<h2 class=\"wp-block-heading\">What is the effect?<\/h2>\n\n\n<ul class=\"wp-block-list\"><li>Smooth terrain (coast, open field): higher wind load even at low height<\/li><li>Rough terrain (suburb, city): lower wind load near the ground<\/li><li>With increasing height the differences even out \u2013 tall buildings are more exposed everywhere<\/li><\/ul>\n\n\n<p class=\"wp-block-paragraph\">Alongside the <a href=\"\/en\/dictionary\/windzone\/\">Wind zone<\/a> and the building height, the terrain category is a parameter under DIN EN 1991-1-4. The calculation is done by the structural engineer.<\/p>\n\n\n<h2 class=\"wp-block-heading\">In practice<\/h2>\n\n\n<p class=\"wp-block-paragraph\">If a building is exposed, on the coast or tall, plan +50 % <a href=\"\/en\/dictionary\/reserve-sicherheitszuschlag\/\">Reserve<\/a> and a wind sensor for the window actuator.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Read more<\/h2>\n\n\n<ul class=\"wp-block-list\"><li><a href=\"\/en\/dictionary\/windzone\/\">Glossary: wind zone<\/a><\/li><li><a href=\"\/en\/dictionary\/windlast\/\">Glossary: wind load<\/a><\/li><li><a href=\"\/en\/dictionary\/wind-monitor\/\">Glossary: Wind monitor<\/a><\/li><\/ul>\n\n\n<p class=\"wp-block-paragraph\"><strong>Tools:<\/strong> Calculate force and stroke with the <a href=\"\/en\/window-actuator-calculator\/\">Window actuator calculator<\/a>, find the right model in a few questions with the <a href=\"\/en\/drive-finder\/\">actuator finder<\/a>.<\/p>\n\n\n<p class=\"wp-block-paragraph\">Not sure which actuator fits? Call us at <a href=\"tel:+494050694631\">040 50694631<\/a> (Mon\u2013Fri 8 am\u20135 pm) or use the <a href=\"\/en\/drive-finder\/\">actuator finder<\/a>.<\/p>\n\n\n<p class=\"wp-block-paragraph\"><a href=\"\/en\/dictionary\/\">\u2190 Back to the glossary<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Die Gel\u00e4ndekategorie beschreibt, wie rau die Umgebung eines Geb\u00e4udes ist. \u00dcber offener See oder flachem Land weht der Wind ungebremst, in St\u00e4dten und W\u00e4ldern bremsen Geb\u00e4ude und B\u00e4ume ihn in Bodenn\u00e4he ab. Wie wirkt sich das aus? Glattes Gel\u00e4nde (K\u00fcste, offenes Feld): h\u00f6here Windlast schon in geringer H\u00f6he Raues Gel\u00e4nde (Vorstadt, Stadt): geringere Windlast in [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"parent":16230,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-17786","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/pages\/17786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/comments?post=17786"}],"version-history":[{"count":0,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/pages\/17786\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/pages\/16230"}],"wp:attachment":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/media?parent=17786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}