{"id":23606,"date":"2026-04-01T13:07:45","date_gmt":"2026-04-01T11:07:45","guid":{"rendered":"https:\/\/incoperfil.com\/?post_type=guia-tecnica&#038;p=23606"},"modified":"2026-04-13T11:05:41","modified_gmt":"2026-04-13T09:05:41","slug":"technical-guide-composite-slab","status":"publish","type":"guia-tecnica","link":"https:\/\/incoperfil.com\/en\/guia-tecnica\/technical-guide-composite-slab\/","title":{"rendered":"0. Technical guide to composite slabs: design, calculation, components and installation"},"content":{"rendered":"<p data-start=\"4183\" data-end=\"4422\">A composite slab is a mixed system in which the profiled steel sheet acts as a permanent formwork during the concreting phase and as an active part of the structural section in service. Proper design requires simultaneous consideration of:<\/p>\n<ul data-start=\"4424\" data-end=\"4615\">\n<li data-start=\"4424\" data-end=\"4463\">Behaviour during the formwork stage<\/li>\n<li data-start=\"4464\" data-end=\"4504\">Behaviour during the composite stage<\/li>\n<li data-start=\"4505\" data-end=\"4549\">Ultimate and serviceability limit states<\/li>\n<li data-start=\"4550\" data-end=\"4582\">Fire resistance requirements<\/li>\n<li data-start=\"4583\" data-end=\"4615\">Real construction conditions<\/li>\n<\/ul>\n<p data-start=\"4617\" data-end=\"4734\">This guide organises these criteria into thematic sections for a structured and coherent understanding of the system.<\/p>\n<h2 data-start=\"4736\" data-end=\"4787\">Structure of the composite slab technical guide<\/h2>\n<h3 data-start=\"4789\" data-end=\"4821\">1. General system concepts<\/h3>\n<p data-start=\"4822\" data-end=\"5008\">This section introduces the definition of the composite system, its application scope, and the distinction between the element (sheet\/profile) and the structural system (composite slab).<\/p>\n<ul data-start=\"5010\" data-end=\"5175\">\n<li data-start=\"5010\" data-end=\"5068\">Composite deck: definition, behaviour and applications<\/li>\n<li data-start=\"5069\" data-end=\"5132\">Composite slab: structural characteristics and applications<\/li>\n<li data-start=\"5133\" data-end=\"5175\">Structural and construction advantages<\/li>\n<\/ul>\n<h3 data-start=\"5177\" data-end=\"5222\">2. Structural design of composite slabs<\/h3>\n<p data-start=\"5223\" data-end=\"5331\">Design must consider both working phases and identify the governing variable: span, load or fire resistance.<\/p>\n<ul data-start=\"5333\" data-end=\"5556\">\n<li data-start=\"5333\" data-end=\"5380\">System phases: formwork and composite stage<\/li>\n<li data-start=\"5381\" data-end=\"5411\">Structural design criteria<\/li>\n<li data-start=\"5412\" data-end=\"5469\">Calculation using resistance tables and design report<\/li>\n<li data-start=\"5470\" data-end=\"5489\">Support spacing<\/li>\n<li data-start=\"5490\" data-end=\"5511\">Profile selection<\/li>\n<li data-start=\"5512\" data-end=\"5556\">Applicable standards (Eurocodes 3 and 4)<\/li>\n<\/ul>\n<h3 data-start=\"5558\" data-end=\"5601\">3. Fire resistance of composite slabs<\/h3>\n<p data-start=\"5602\" data-end=\"5681\">Fire resistance is verified according to UNE-EN 1994-1-2 and depends mainly on:<\/p>\n<ul data-start=\"5683\" data-end=\"5788\">\n<li data-start=\"5683\" data-end=\"5703\">Total slab depth<\/li>\n<li data-start=\"5704\" data-end=\"5737\">Effective reinforcement cover<\/li>\n<li data-start=\"5738\" data-end=\"5767\">Bottom reinforcement area<\/li>\n<li data-start=\"5768\" data-end=\"5788\">Profile geometry<\/li>\n<\/ul>\n<h3 data-start=\"5790\" data-end=\"5831\">4. Components of the composite slab<\/h3>\n<p data-start=\"5832\" data-end=\"5882\">Performance depends on proper component selection:<\/p>\n<ul data-start=\"5884\" data-end=\"5991\">\n<li data-start=\"5884\" data-end=\"5901\">Profile types<\/li>\n<li data-start=\"5902\" data-end=\"5915\">Thickness<\/li>\n<li data-start=\"5916\" data-end=\"5933\">Base material<\/li>\n<li data-start=\"5934\" data-end=\"5952\">Concrete types<\/li>\n<li data-start=\"5953\" data-end=\"5970\">Reinforcement<\/li>\n<li data-start=\"5971\" data-end=\"5991\">Shear connectors<\/li>\n<\/ul>\n<h3 data-start=\"5993\" data-end=\"6028\">5. Construction and detailing<\/h3>\n<p data-start=\"6029\" data-end=\"6060\">Execution phase considerations:<\/p>\n<ul data-start=\"6062\" data-end=\"6219\">\n<li data-start=\"6062\" data-end=\"6078\">Installation<\/li>\n<li data-start=\"6079\" data-end=\"6090\">Fixings<\/li>\n<li data-start=\"6091\" data-end=\"6111\">Minimum supports<\/li>\n<li data-start=\"6112\" data-end=\"6134\">Deflection control<\/li>\n<li data-start=\"6135\" data-end=\"6154\">Unpropped slabs<\/li>\n<li data-start=\"6155\" data-end=\"6190\">Integration in steel structures<\/li>\n<li data-start=\"6191\" data-end=\"6219\">Cantilevers and openings<\/li>\n<\/ul>\n<h3 data-start=\"6221\" data-end=\"6268\">6. Alternative system: permanent formwork<\/h3>\n<p data-start=\"6269\" data-end=\"6327\">Use of profiled sheeting without structural collaboration.<\/p>\n<h2 data-start=\"6329\" data-end=\"6352\">Guide methodology<\/h2>\n<ul data-start=\"6353\" data-end=\"6422\">\n<li data-start=\"6353\" data-end=\"6375\">Sequential reading<\/li>\n<li data-start=\"6376\" data-end=\"6396\">By project phase<\/li>\n<li data-start=\"6397\" data-end=\"6422\">By governing variable<\/li>\n<\/ul>\n<h2 data-start=\"6424\" data-end=\"6440\">Conclusion<\/h2>\n<p data-start=\"1484\" data-end=\"2073\">Composite slabs are a well-established structural system whose effectiveness depends on the proper integration of design, standards, and execution. Identifying the governing design variable, selecting the appropriate profile, and verifying both working phases are the key pillars of a rational design approach. This Technical Guide structures these criteria into a coherent digital manual, enabling an organised and technically sound consultation. The content is based on technical experience gained from real projects and on the preparation of design reports in accordance with Eurocodes.<\/p>\n<h2 data-start=\"2075\" data-end=\"2115\">Technical manual for composite slabs<\/h2>\n<p data-start=\"2117\" data-end=\"2400\">For a complete definition of the system, design criteria, calculation basis, resistance tables, construction details, and installation procedures, please refer to the Incoperfil Composite Slab Technical Manual, available upon registration in the Documentation section of the website.<\/p>\n<hr data-start=\"5611\" data-end=\"5614\" \/>\n<p data-start=\"2402\" data-end=\"2430\">Last update: February 2026<\/p>\n<p data-start=\"2432\" data-end=\"2654\" data-is-last-node=\"\" data-is-only-node=\"\">\u00a9 Incoperfil. All rights reserved.<br data-start=\"2466\" data-end=\"2469\" \/>The technical content of this article forms part of the Composite Slab Technical Manual and the documentation registered by Incoperfil with ColorIURIS (Record No. 1-INCOPERFIL-12.2025).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This Technical Guide to composite slabs constitutes a structured manual for the design, calculation and execution of steel\u2013concrete composite slabs with profiled decking. Its content is developed in accordance with Eurocodes 3 and 4, UNE-EN 1994-1-2 for fire resistance, and the current Structural Code.<\/p>\n","protected":false},"author":2,"featured_media":14116,"menu_order":1,"template":"","meta":{"_acf_changed":false},"categories":[1328],"tags":[],"class_list":["post-23606","guia-tecnica","type-guia-tecnica","status-publish","has-post-thumbnail","hentry","category-technical-guides-for-composite-flooring"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>0. 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