Safe Useful Life Expectancy
Trees in Hard Landscapes, A Guide for Delivery, published by the Trees and Design Action Group in September 2014, defines Safe Useful Life Expectancy (SULE) as a: ‘…method of assessing the relative importance of individual trees, categorized as ‘good’, ‘medium’ or ‘bad’ within an identified group or area (usually a development site). Subjective and so cannot be absolute judgement.’
[edit] Related articles on Designing Buildings Wiki
- Arboriculturist.
- A guide to the use of urban timber FB 50.
- Definition of tree for planning purposes.
- Forests.
- The benefits of urban trees
- The effect of trees on rights of light.
- The use of timber in construction.
- Timber.
- Tree preservation order.
- Tree rights.
- Tree root subsidence.
- Trees in conservation areas
- Trees.
- Tree root subsidence.
- Types of timber.
- Urban trees.
- Useful life.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Recognition, influence and growth
SocEnv identifies three strategic pillars in new strategy to 2045.
Discover the future of roofing, cladding and insulation.
New guidance for professional practice, cultural change and regulation in social housing.
The heritage of nuclear and conventional power stations.
New measures to stop people being ripped off
Government to protect families from cowboy builders and aggressive bailiffs.
New Futurebuild showcase brings an innovation-first approach.
National Planning Policy Framework
Understanding the 2026 changes.
ECA's public affairs priorities
Member consultation opens to shape priorities for 2027 to 2030.
Dutyholder responsibilities from 1 July 2026.
Where performance meets practice
The Building Envelope Stage at UKCW Birmingham.
CIAT publishes briefing on planning reforms.
Leaders in Learning for Practice Network
Call for conservation leaders in learning to register interest in new network.