- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 03 May 2020
What does in situ mean?
In situ (also referred to as insitu or in-situ) is a Latin phrase that is commonly used in the construction industry to mean ‘on site’, ‘in place’ or ‘in position’. It refers to work which is carried out on the construction site itself, often in the finished position, as opposed to in an off-site location as with prefabrication or pre-assembly techniques.
The most common use of the term 'in situ' is in relation to concrete, with components such as a slabs, beams and piles being described as ‘cast in situ’ to distinguish them from precast concrete components, that are manufactured off site.
Generally, in situ construction techniques tend to be more labour- and time-intensive, however, they are more flexible in response to changes that may arise on site. Prefabricated components, in contrast, must be designed in detail in advance, with limited scope for changes once they have been manufactured.
See also: On site.
 Related articles on Designing Buildings Wiki
Featured articles and news
His life, art and legacy. 1 min book review.
An ambitious Victorian new town that was not delivered as planned.
Using weather and climate information to support infrastructure planning.
Chemicals can slow - and ideally stop - the spread of fire.
Consultation begins on once in a generation changes to the planning system.
Making the case for breathing new life into existing buildings.
Masonry technique from Scotland and Ireland was exported to North America.
Procurement model puts operations in the hands of the client.
Recommendations on face coverings in workplaces.
Putting the rubber IN the road.