Light gauge steel framing systems

Light gauge MMC, or light gauge steel framing is a Modern Method of Construction. It is a factory-manufactured building system made from thin, cold-formed galvanised steel sections that are designed off-site and assembled on site as panels or volumetric units. “MMC” refers to the UK government’s classification of Modern Methods of Construction, particularly Category 2, which covers panelised systems manufactured off-site.

The “light gauge” element refers to the thickness of the steel sections, which are typically between about 0.9 mm and 2.4 mm thick. These sections are cold-formed rather than hot-rolled, giving them high strength-to-weight ratios while remaining relatively easy to handle and transport.

Light gauge steel MMC is most commonly used for the loadbearing structure of mid-rise buildings. It can form the primary structural frame, floors and internal walls, often combined with other systems such as concrete floor slabs, rainscreen cladding or brick slip façades. Because components are precision-engineered in a factory, tolerances are tight and site assembly is rapid compared to traditional masonry construction.

Light gauge MMC is often promoted for its speed, quality control and suitability for repeatable housing typologies, while also giving good cost certainty, supply-chain maturity and long-term adaptability when compared with both traditional construction and other MMC approaches such as cross-laminated timber or modular volumetric systems.

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