{"id":6792,"date":"2026-11-02T05:09:16","date_gmt":"2026-11-02T05:09:16","guid":{"rendered":"https:\/\/www.ggsteelstruct.com\/?p=6792"},"modified":"2026-11-04T06:26:08","modified_gmt":"2026-11-04T06:26:08","slug":"what-is-steel-structure","status":"publish","type":"post","link":"https:\/\/www.ggsteelstruct.com\/vi\/resources\/what-is-steel-structure\/","title":{"rendered":"What is a steel structure? Systems, parts and when to use one"},"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-frame-site-installation-456.webp\" alt=\"\" class=\"wp-image-6474\" srcset=\"https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-frame-site-installation-456.webp 1600w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-frame-site-installation-456-300x225.webp 300w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-frame-site-installation-456-1024x768.webp 1024w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-frame-site-installation-456-768x576.webp 768w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-frame-site-installation-456-1536x1152.webp 1536w, https:\/\/www.ggsteelstruct.com\/wp-content\/uploads\/2026\/11\/steel-frame-site-installation-456-16x12.webp 16w\" sizes=\"(max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A steel structure is a building or frame whose main load-carrying members are made of structural steel: columns, beams, trusses and bracing, joined by bolts or welds. The floors, walls and roof are carried by that frame.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"systems\">The main structural systems<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>System<\/th><th>How it carries load<\/th><th>S\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th><\/tr><\/thead><tbody><tr><th>Portal frame<\/th><td>Rigid column-rafter frames in one plane, braced between frames<\/td><td>Warehouses, factories<\/td><\/tr><tr><th>Braced frame<\/th><td>Pinned beams and columns, diagonal bracing for lateral load<\/td><td>Multi-storey offices, plants<\/td><\/tr><tr><th>Moment frame<\/th><td>Rigid beam-column joints resist lateral load<\/td><td>Buildings where bracing blocks openings<\/td><\/tr><tr><th>Truss and space frame<\/th><td>Triangulated members carry long spans<\/td><td>Hangars, stadiums, roofs<\/td><\/tr><tr><th>Composite frame<\/th><td>Steel acting with concrete (SRC, CFT, composite floors)<\/td><td>High-rise, heavy floors<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"parts\">The parts of a steel building<\/h2>\n\n\n\n<ul class=\"wp-block-list is-style-check\">\n<li><strong>Primary steel:<\/strong> columns, rafters, beams, trusses<\/li>\n\n\n<li><strong>Secondary steel:<\/strong> purlins, girts, bracing, sag rods<\/li>\n\n\n<li><strong>Connections:<\/strong> bolts, end plates, base plates, anchor bolts<\/li>\n\n\n<li><strong>Floors:<\/strong> composite deck or precast slabs<\/li>\n\n\n<li><strong>Envelope:<\/strong> roof and wall sheets or panels<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"when\">When steel beats concrete<\/h2>\n\n\n\n<ul class=\"wp-block-list is-style-check\">\n<li>Spans over about 18 m<\/li>\n\n\n<li>Programmes where frame and slab work overlap<\/li>\n\n\n<li>Buildings that will be extended or changed<\/li>\n\n\n<li>Sites where concrete labour or formwork is scarce<\/li>\n<\/ul>\n\n\n\n<p class=\"is-note wp-block-paragraph\"><strong>Quy t\u1eafc ng\u00f3n tay c\u00e1i:<\/strong> if the building is short-span, heavy-walled and local concrete is cheap, compare both systems before choosing steel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"cost\">What decides cost<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Steel tonnage, fabrication complexity, coating, envelope, freight and erection. Our <a href=\"\/vi\/resources\/steel-building-cost-per-ton\/\">cost guide<\/a> breaks each one down.<\/p>","protected":false},"excerpt":{"rendered":"<p>A plain-language guide to steel structures: the main structural systems, the parts of a steel building, and when steel beats concrete.<\/p>","protected":false},"author":1,"featured_media":6474,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_aseo_title":"What Is a Steel Structure? Systems, Parts & Uses | GG Steel","_aseo_desc":"A plain-language guide to steel structures: the main structural systems, the parts of a steel building, and when steel is better than concrete. Read the guide.","_aseo_noindex":false,"_aseo_og_image":0,"_aseo_schema_type":""},"categories":[30],"tags":[],"class_list":["post-6792","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides"],"_links":{"self":[{"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/posts\/6792","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/comments?post=6792"}],"version-history":[{"count":5,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/posts\/6792\/revisions"}],"predecessor-version":[{"id":7235,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/posts\/6792\/revisions\/7235"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/media\/6474"}],"wp:attachment":[{"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/media?parent=6792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/categories?post=6792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/tags?post=6792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}