offsite construction guide, BSRIA,
© Knud Nielsen

BSRIA has launched its highly-anticipated new free to download topic guide on Offsite Construction for Building Services

The new offsite construction guide is an ‘at a glance publication’ to give readers a glimpse of the subject and suggests further reading.

Offsite construction, or offsite manufacture or pre-fabrication, or modular construction, is a general term for making parts of a building away from the construction site, in a purpose-built facility, before transporting them and installing them in their final location. It has the potential to make things on site much easier. (Check out PBC Today’sGuide to modular construction’).

Installing several mechanical and electrical systems on a live construction site can be challenging, with limited space, health and safety considerations.

The offsite construction guide highlights:

  • Offsite construction for services distribution – namely: vertical services risers; larger assemblies; horizontal distribution;
  • Offsite construction for packaged rooms – and inside or outside?
  • If offsite construction is right for the project in hand?

The guide’s author, John Sands, Principal Consultant, BSRIA, said: “As with any technology or process, the use of offsite construction needs to be considered carefully to get the best from it. Working in a controlled, purpose-made environment can increase productivity, with no distractions from other construction site activities or issues.

“Time spent on site is also reduced as assemblies arrive ready to be put in place, together with reduced downtime in the factory where work isn’t affected by other events on the construction site.

“The controlled environment enables quality to be improved – the right conditions can be provided for the task and quality control procedures followed – rather than the general conditions of the construction site.

“But, it is worth remembering, that flexibility can be reduced as it is harder to accommodate changes that occur on site if the assemblies are being made in the factory – especially at short notice.”

Some points to look out for:

  • Consider early on in the project if offsite construction techniques are to be used on the project.
  • When considering offsite construction, make sure that the designers know – it may affect the design solutions that are put forward.
  • There are different scales of offsite construction, from widespread services distribution to local applications such as packaged plant rooms, see what suits the project.

Offsite Construction for Building Services is free to download from the BSRIA website: BSRIA topic guides.

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