{"id":6785,"date":"2026-11-02T05:09:12","date_gmt":"2026-11-02T05:09:12","guid":{"rendered":"https:\/\/www.ggsteelstruct.com\/?p=6785"},"modified":"2026-11-04T06:26:13","modified_gmt":"2026-11-04T06:26:13","slug":"c-purlin-vs-z-purlin","status":"publish","type":"post","link":"https:\/\/www.ggsteelstruct.com\/es\/resources\/c-purlin-vs-z-purlin\/","title":{"rendered":"C purlin vs Z purlin: which to use"},"content":{"rendered":"<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1600\" height=\"1200\" src=\"https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-roll-forming-line-240.webp\" alt=\"\" class=\"wp-image-6476\" srcset=\"https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-roll-forming-line-240.webp 1600w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-roll-forming-line-240-300x225.webp 300w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-roll-forming-line-240-1024x768.webp 1024w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-roll-forming-line-240-768x576.webp 768w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-roll-forming-line-240-1536x1152.webp 1536w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-roll-forming-line-240-16x12.webp 16w\" sizes=\"(max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Purlins carry the roof sheets to the rafters; girts do the same for walls. Both are usually cold-formed C or Z sections.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"diff\">The difference<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th><\/th><th>Correa C<\/th><th>Correa Z<\/th><\/tr><\/thead><tbody><tr><th>Shape<\/th><td>Symmetrical C<\/td><td>Point-symmetric Z<\/td><\/tr><tr><th>Lapping at supports<\/th><td><strong>No<\/strong><\/td><td><strong>Yes, nested<\/strong><\/td><\/tr><tr><th>Mejor para<\/th><td>Simple spans, edges, girts, openings<\/td><td>Continuous multi-span roofs<\/td><\/tr><tr><th>Steel use on long runs<\/th><td>Higher<\/td><td><strong>Lower<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sizes\">Sizes and coating<\/h2>\n\n\n\n<ul class=\"wp-block-list is-style-check\">\n<li>Depths 100\u2013300 mm, thickness 1.5\u20133.0 mm<\/li>\n\n\n<li>Pre-galvanized Z275 as standard<\/li>\n\n\n<li>Hot-dip galvanized after forming for corrosive sites<\/li>\n<\/ul>\n\n\n\n<p class=\"is-note wp-block-paragraph\"><strong>Use both:<\/strong> Z purlins on the roof run, C sections at eaves, openings and walls is a common mix.<\/p>","protected":false},"excerpt":{"rendered":"<p>Cold-formed C and Z purlins compared: lapping, span, use as girts, sizes and galvanizing.<\/p>","protected":false},"author":1,"featured_media":6476,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_aseo_title":"C Purlin vs Z Purlin: Which to Use for Your Roof | GG Steel","_aseo_desc":"Cold-formed C and Z purlins compared on lapping, span, use as wall girts, common sizes and hot-dip galvanizing. Guidance on which to choose. Read the guide.","_aseo_noindex":false,"_aseo_og_image":0,"_aseo_schema_type":""},"categories":[30],"tags":[],"class_list":["post-6785","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides"],"_links":{"self":[{"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/posts\/6785","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/comments?post=6785"}],"version-history":[{"count":4,"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/posts\/6785\/revisions"}],"predecessor-version":[{"id":7112,"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/posts\/6785\/revisions\/7112"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/media\/6476"}],"wp:attachment":[{"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/media?parent=6785"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/categories?post=6785"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/es\/wp-json\/wp\/v2\/tags?post=6785"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}