National Light-Gauge Steelwork Specification (NLSS)

Light-gauge steel frame structures use galvanised cold-formed steel sections as the primary structural components which can be assembled into prefabricated panels. Light gauge steel is an integral part of modular construction because it is strong, lightweight, durable and is becoming a more significant solution for residential buildings.

The introduction of the Building Safety Act has focused the construction industry on competence and capability to ensure that building projects are robust and are designed and constructed to meet the safety of those living and working in residential and office buildings.

Building on this wider context, the BCSA has developed a National Light Gauge Steel Specification (NLSS), with input from industry. It sets out a framework of requirements to reassure designers, clients and contractors that the light gauge steel industry is able to establish and maintain high standards in all areas of its operations.

What does the National Light-Gauge Steelwork Specification (NLSS) cover?

The National Light-Gauge Steelwork Specification seeks to harmonise both the approach, and the terms used in the industry providing transparency that reduces risk. It also aims to improves communication and quality standards; so describes the information to be included in a project specification such as:

  • Materials used
  • Transfer of design information
  • Manufacture
  • Assembly
  • Installation
  • Requirements for protective treatment
  • Quality management


Key dates

As with all National UK Specifications that are launched, a 6-month familiarisation period is given, during which the document can be used voluntarily. This first edition will come into force from April 2025.


It will be available to purchase from the bookstore on the 23rd October 2024


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