4.4.5 Services and drainage
Raft, pile, pier and beam foundations shall take account of new and existing services. Issues to be taken into account include:
- provision for new services
- adequate protection of existing services and drainage.
Provision for new services#
Where services are to pass through, above or under foundations, openings should be provided using suitable ducts, sleeves or lintels that:
- are detailed so as not to impair structural stability
- do not affect the ability of the foundation to carry loads
- make suitable provision to allow for movement
- have sufficient space to maintain line and gradient of drainage where movement occurs.
Existing services and drainage#
Existing services or drains should:
- be supported and protected
- be bridged, to prevent any load carrying
- not be rigidly encased in concrete, masonry, etc.
Land drains should be diverted to a suitable outfall; other drains should be diverted or bridged.
Last updated: 2nd January 2024