- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 24 Mar 2020
Pre-manufacturing (3D primary structural systems)
Modern Methods of Construction, Introducing the MMC definition framework, published by Ministry of Housing, Communities & Local Government (MHCLG) in 2019 defines 7 categories for MMC:
- Category 1 – Pre-manufacturing (3D primary structural systems).
- Category 2 – Pre-manufacturing (2D primary structural systems).
- Category 3 – Pre-manufacturing components (non-systemised primary structure).
- Category 4 – Additive manufacturing (structural and non-structural)
- Category 5 – Pre-manufacturing (non structural assemblies and sub-assemblies).
- Category 6 – Traditional building product led site labour reduction / productivity improvements.
- Category 7 – Site process led site labour reduction / productivity / assurance improvements.
Category 1 – Pre-Manufacturing (3D primary structural systems) is defined as:
‘A systematised approach based on volumetric construction involving the production of three-dimensional units in controlled factory conditions prior to final installation. Volumetric units can be brought to the final site in a variety of forms ranging from a basic structure only to one with all internal and external finishes and services installed, all ready for installation.
The system includes structural performance. Full volumetric units in apartment buildings can include apartment space and common area space. Mini volumetric structural units can include bathroom pods and the like which are structurally stacked and loaded.’
 Related articles on Designing Buildings Wiki
- British post-war mass housing.
- Design for deconstruction.
- Design for Manufacture and Assembly (DfMA).
- MMC definition framework.
- Modern methods of construction.
- Off site, on track.
- Off-site construction.
- Off-site prefabrication of buildings: A guide to connection choices.
- Pre-manufactured value
Featured articles and news
BSRIA examines factors driving the industry.
Ensuring designs are developed, validated and can be effectively implemented.
The Homebuyer Survey most suitable for newer homes or simple properties.
Health and safety practices for body and mind.
28 leading bodies set out their vision for the future.
Chancellor announces latest Winter Support packages.
Tapping technology to boost infrastructure and create jobs.
4 ways to ensure certificates are valid.
White elephant construction projects.
How Paul Williams bent over backwards to overcome racial barriers.
Organisation revises actions around dealing with COVID-19.
CIOB, NFCC, RIBA, RICS call for changes ahead of Building Safety Bill.
Developments in the Future Homes Standard.
An American chimney feature with a colourful past.