Fabrication
![]() |
In construction, a ‘fabrication’ is an item that is manufactured by a fabricator for installation on a building site as part of an ongoing construction project, for example, a window, door, steel member, staircase and so on that is typically made off-site to the specification required for the project.
A building’s windows are normally fabricated off-site to special dimensions that the fabricator has either taken off the drawings or specification, or else has visited the site and measured for the item to be supplied. The fabricator can then proceed to manufacture. It should be noted that a fabrication can be termed ‘prefabricated’ if it is made off site. Delivered to site ready to install means that these items can help reduce waste and time and cut emissions.
For more information see: Prefabrication.
In theory, it is possible for fabrications to be made on site (or in a flying factory) as opposed to off site, assuming the process is simple enough (e.g timber windows) and there is enough space on site to allow the fabrication process to take place. In most circumstances however, fabricating building elements can require complex machinery that requires the controlled conditions, accuracy and space offered by a manufacturing plant.
[edit] Related articles on Designing Buildings Wiki
- Concrete frame.
- Construction problems avoided by using a modular approach.
- Crosswall construction.
- Design for Manufacture and Assembly (DfMA).
- Modular buildings.
- Offsite manufacturing.
- Off-site construction.
- Off site, on track.
- Prefabrication.
- Stainless steel.
- Steel frame.
- Structure relocation.
- The overlooked secret of off-site fabrication.
Featured articles and news
British architecture 1919–39. Book review.
Conservation of listed prefabs in Moseley.
Energy industry calls for urgent reform.
Heritage staff wellbeing at work survey.
A five minute introduction.
50th Golden anniversary ECA Edmundson apprentice award
Showcasing the very best electrotechnical and engineering services for half a century.
Welsh government consults on HRBs and reg changes
Seeking feedback on a new regulatory regime and a broad range of issues.
CIOB Client Guide (2nd edition) March 2025
Free download covering statutory dutyholder roles under the Building Safety Act and much more.
AI and automation in 3D modelling and spatial design
Can almost half of design development tasks be automated?
Minister quizzed, as responsibility transfers to MHCLG and BSR publishes new building control guidance.
UK environmental regulations reform 2025
Amid wider new approaches to ensure regulators and regulation support growth.
The maintenance challenge of tenements.
BSRIA Statutory Compliance Inspection Checklist
BG80/2025 now significantly updated to include requirements related to important changes in legislation.
Shortlist for the 2025 Roofscape Design Awards
Talent and innovation showcase announcement from the trussed rafter industry.
OpenUSD possibilities: Look before you leap
Being ready for the OpenUSD solutions set to transform architecture and design.
Global Asbestos Awareness Week 2025
Highlighting the continuing threat to trades persons.
Retrofit of Buildings, a CIOB Technical Publication
Now available in Arabic and Chinese as well as English.