BCSA (British Constructional Steelwork Association) is the national organisation for the steel construction industry: its Member companies undertake the design, fabrication and erection of steelwork. The main aim of the Association is to promote the use of structural steelwork; to assist specifiers and clients; to ensure that the capabilities and activities of the industry are widely understood and to provide members with professional services in technical, commercial, contractual, quality assurance and health & safety matters.

Constructionline is the UK's register of pre-qualified local and national construction and construction-related suppliers. Constructionline has grown and been updated in line with the needs of modern procurement. The OGC Common Minimum Standards and The Local Government Task Force also recommend using Constructionline as part of the pre-qualification and tendering process.

BSI (British Standards Institution) are a leading global provider of management systems assessment and certification solutions, with more than 60,000 certified locations and clients in over 100 locations worldwide. BSI can help companies to implement and certify an effective management system across a broad range of business areas and standards.

RQSC (The Register of Qualified Steelwork Contractors) is more than just a list of companies, as each company must be regularly audited by specialist steelwork auditors who check the company's financial resources, technical expertise and track record. The result is two criteria: Categorisation of the company in terms of the work it can execute technically and Classification of the company in terms of the maximum size of contract it should handle.