Contractual tree for building design and construction
A contractual tree is a diagram illustrating the contractual relationship between the parties involved in a project. This might include contracts between; funders, the client, consultants, sub-consultants, contractors, sub-contractors and suppliers and may include ‘secondary’ agreements which are associated with the 'primary' contracts, such as collateral warranties. On complex projects such as a PFI projects it may include other project agreements such as concession agreements.
The contractual tree only shows legal relationships, it does not set out reporting lines or limits of authority and is not the same as an organisation chart. For example, on construction management projects, trade contractors might report to the construction manager, but their legal relationship is with the client.
 Related articles on Designing Buildings Wiki
Featured articles and news
We review a book aiming to unpick the complexities of building physics.
An introduction to the categories, procedures and types of listed buildings.
This Australian robotics firm have developed a bricklaying machine capable of building a house in 3 days.
20bn devices will be online by 2020, generating huge volumes of information. Is society making the most of this rich data?
Built over a period of 632 years, Cologne Cathedral is considered one of the world's finest examples of Gothic architecture.
UandI adds £1.5bn to development pipeline.
Here are 5 things leaders can do to create a truly circular economy.
Find out about the different types of delays on construction projects.
Researchers at Wien university have developed new system to create an inflatable concrete structure.
Take a look at this newly-opened tower in Chicago with a remarkable 20:1 height-to-base ratio.
The principles, practice and formwork of one of the most important components of modern architecture.