Cover to reinforcement – getting it right: use of spacers and chairs, and tying of reinforcement

• Chris Shaw ^[1]
  1. [1] CEng
• Localización: The Structural Engineer: journal of the Institution of Structural Engineer, ISSN 1466-5123, Vol. 99, Nº. 11, 2021, págs. 18-20
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Reinforced concrete is the most commonly used structural material around the world. It is essential to the performance of reinforced concrete structures that the specifi ed cover to the reinforcement is achieved during their construction. The correct positioning of the steel reinforcement, either bar or welded fabric, is crucial in achieving the design performance of the structure, both in terms of durability and integrity.

    However, for many years, there was no published national guidance in the UK on how to achieve the specifi ed cover, which in many cases was not met. BS 7973:20011 is the result of over 50 years of research, development, and application of the requirements in actual structures.

    The standard is applicable to the construction of both in situ and precast reinforced concrete elements.

    Part 1 of this article2 described the product performance requirements for spacers and chairs in accordance with BS 7973-1. Part 2 (following BS 7973-2) now addresses the fi xing and application of spacers and chairs, and the tying of reinforcement.