{"id":62082,"date":"2019-08-23T09:50:04","date_gmt":"2019-08-23T08:50:04","guid":{"rendered":"https:\/\/www.pbctoday.co.uk\/news\/?p=62082"},"modified":"2019-08-23T09:50:04","modified_gmt":"2019-08-23T08:50:04","slug":"reusing-structural-steel","status":"publish","type":"post","link":"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/reusing-structural-steel\/62082\/","title":{"rendered":"A new protocol for reusing structural steel"},"content":{"rendered":"<h2 class=\"p2\"><span class=\"s1\"><a href=\"https:\/\/steel-sci.com\/\" target=\"_blank\" rel=\"noopener\">The Steel Construction Institute<\/a> has developed a draft protocol proposing a system of investigation and testing to support the mainstream reuse of structural steel<\/span><\/h2>\n<p class=\"p2\"><span class=\"s1\">Reusing reclaimed structural steel, as opposed to the common practice of recycling by remelting scrap, offers significant environmental benefits and potential cost savings.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">Steel has excellent credentials for the circular economy, both as a material that is strong, durable, versatile and recyclable and as a <a href=\"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/steel-framing-system-guide\/54894\/\" target=\"_blank\" rel=\"noopener\">structural framing system<\/a> that is lightweight, flexible, adaptable and reusable.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">And, with growing pressure to think more about the impact of construction materials, as well as national and international projects that have successfully reused structural steel, the Steel Construction Institute is in the process of developing a protocol to help facilitate the reuse of structural steel sections reclaimed from existing building structures.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">The <a href=\"https:\/\/www.steel-sci.com\/assets\/downloads\/steel-reuse-protocol-v06.pdf\" target=\"_blank\" rel=\"noopener\">draft protocol<\/a> proposes a new system of investigation and testing to establish material characteristics, with advice for designers completing member verifications. The protocol places responsibilities on the holder of salvaged steelwork, including identification, assessment, control procedures and declarations of conformity.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">It is founded on the principle that given the appropriate determination of material characteristics and tolerances, refabricated salvaged steelwork may be fabricated and CE marked in accordance with BS EN 1090.<\/span><\/p>\n<h3 class=\"p2\"><span class=\"s1\">Drivers for reuse of structural steelwork<\/span><\/h3>\n<p class=\"p2\"><span class=\"s1\">Structural steel sections are inert, robust and dimensionally stable elements that are generally bolted together to form structural assemblies which are inherently demountable.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">As such, they are seen as an obvious candidate for reclamation and reuse, as opposed to re-melting. Reusing structural steel yields significant environmental savings compared to recycling at a time when there is growing pressure on the construction industry to be more resource-efficient, reduce waste and to lower embodied carbon impacts.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">More recently, there has been a push towards the concept of the circular economy, particularly at the EU level, with a roadmap developed to support a shift towards a resource-efficient, low carbon European economy.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">Increased structural steel reuse will support both of these aims and stimulate new business opportunities in the UK in particular by substituting steel imports. Although new steel and scrap steel prices are volatile, analysis reveals that the long-term price differential between the cost of UK structural steel and scrap sections is over \u00a3300 per tonne. This represents the potential profit opportunity through structural steel reuse. Although additional costs (relative to recycling) may be incurred through deconstruction, testing, storage, refabrication etc, structural steel reuse can yield cost savings.<\/span><\/p>\n<h3 class=\"p2\"><span class=\"s1\">Salvage, stock and reuse<\/span><\/h3>\n<p class=\"p2\"><span class=\"s1\">The process of reclaiming steelwork to reuse in another structure can be broken down into several stages:<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">1. A building is offered for salvage of the steelwork for reuse.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">2. A business case is established between the holder of the stock and the company responsible for the demolition.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">3. Details of the anticipated salvaged steel are recorded, such as the age of the structure, a preliminary listing of the steel components and a preliminary inspection of the members for damage, obvious repairs and significant corrosion.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">4. Salvaged steelwork is received by the stockholder, grouped and listed. A single batch of structural members is identified as being taken from the same original structure, having the same serial size and structural function, having the same material grade, as established by the non-destructive testing of every member. The grouping has an important impact on the extent of testing required.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">5. Members are inspected and tested. The testing regime involves a combination of non-destructive and optional destructive testing, with the opportunity to make conservative assumptions about certain material characteristics. The seller of the stock is responsible for declaring the necessary characteristics as the material is sold.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">6. Material is sold, with an accompanying declaration of the material characteristics by the holder of the salvaged stock.<\/span><\/p>\n<p class=\"p2\"><span class=\"s1\">7. Structural design and member verification is completed with certain modifications.<\/span><\/p>\n<h3 class=\"p2\"><span class=\"s1\">Barriers to reuse<\/span><\/h3>\n<p class=\"p1\"><span class=\"s1\">The reuse of steel is not a new concept; indeed, it was more common a few decades ago before suffering from a decline, partly because of new development programme constraints and tougher health and safety requirements for demolition, particularly working at height.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">While reusing steel is technically viable, there are many barriers \u2013 real and perceived \u2013 to adoption. Based on SCI&#8217;s consultations with the supply chain, the main barriers to reuse are:<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">1. Availability of reclaimed sections, particularly of the desired size, volume and in the right location. <\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">2. Issues relating to the quality, traceability and certification of reclaimed sections.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">3. Additional cost associated with using reclaimed sections.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">4. A lack of supply chain integration; particularly communication and sharing information through the supply chain and trust (and risk-sharing) between companies.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">5. Additional time required within construction programmes to allow for using reclaimed steel; in general, additional time incurs additional cost.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">6. Reclaiming and reusing structural steel is a relatively uncommon practice and many organisations simply do not have the skills or experience to do it.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">7. The perception that reclaimed steel is somehow inferior to new steel sections.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">BIM can overcome several of these barriers by providing certainty about material properties, traceability and provenance, offering a more cost-effective means of enabling future reuse.<\/span><\/p>\n<h3 class=\"p1\"><span class=\"s1\">Design for deconstruction<\/span><\/h3>\n<p class=\"p1\"><span class=\"s1\">Design for deconstruction is key to the circular economy yet at present, buildings are generally demolished with little thought about preserving the integrity and value of its components for reuse. At its most basic, there are two considerations:<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">1. The types of materials and components used; some products, like structural steel, are inherently more reusable than other structural materials and systems.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">2. The way the materials and components are put together and deconstructed.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">The key principles for design for deconstruction are:<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">1. Simplicity: Design building systems and interfaces that are simple to understand, with a limited number of different material types and component sizes.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">2. Standardisation and regularity: Design building systems and materials that are similar throughout the building and laid out in regular, repeating patterns. Where possible, standardised elements.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">3. Simplify and separate building systems: Use a layering approach to keep elements of the buildings (with different anticipated lifetimes) separate.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">4. Minimise the number of different types of materials and components; fewer larger elements which are more durable and easier and quicker to remove are more likely to be reused.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">5. Use lightweight materials and components.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">6. Use reusable materials: Chose materials that are inherently durable and reusable and retain their value through reuse.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">7. Identify points of disassembly\/connections and ensure they remain accessible.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">8. Simplify and standardise connection details: This allows for efficient construction and deconstruction and facilitates reuse without modification after deconstruction.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">9. Use mechanical fasteners in preference to chemicals such as sealants and adhesives. <\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">10. Record as-built conditions, ie what was built not just what was designed.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">11. Provide a deconstruction plan outlining general concepts where the load path for the self-weight of structure and deconstruction loads follow conventional paths. Provide specific, detailed plans where load paths are not conventional. All load transfer systems should be identified.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">12. Record adaptations to the building over its life.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\">13. Ensure information is securely stored and remains accessible.<\/span><\/p>\n<p class=\"p1\"><span class=\"s1\"><a href=\"https:\/\/www.pbctoday.co.uk\/news\/stakeholders\/steel-construction-institute-research-advice-and-support\/59713\/\" target=\"_blank\" rel=\"noopener\">The SCI<\/a> intends to consult on its draft protocol over the summer and then formally launch it at an event at the Build Centre in London on 8 October.<\/span><\/p>\n<div class=\"mk-custom-module-container\">\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The SCI has developed a draft protocol proposing a system of investigation and testing to support the mainstream reuse of structural steel.<\/p>\n","protected":false},"author":20,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[306],"tags":[428,727,676,908,636,967,33369,32291,32292,26264],"stakeholder_rel_tag":[172527],"contributor_rel_tag":[],"class_list":{"0":"post-62082","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-building-control-news","7":"tag-bim","8":"tag-circular-economy","9":"tag-construction","10":"tag-economy","11":"tag-engineering","12":"tag-eu","13":"tag-pbc-today-august-2019","14":"tag-sh-steel-construction-institute","15":"tag-steel","16":"tag-steel-frame-construction","17":"stakeholder_rel_tag-steel-construction-institute"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v26.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>A new protocol for reusing structural steel<\/title>\n<meta name=\"description\" content=\"The SCI has developed a draft protocol proposing a system of investigation and testing to support the mainstream reuse of structural steel\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/reusing-structural-steel\/62082\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A new protocol for reusing structural steel\" \/>\n<meta property=\"og:description\" content=\"The SCI has developed a draft protocol proposing a system of investigation and testing to support the mainstream reuse of structural steel\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.pbctoday.co.uk\/news\/building-control-news\/reusing-structural-steel\/62082\/\" \/>\n<meta property=\"og:site_name\" content=\"Planning, Building &amp; 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