Use the TPZ calculator or SRZ calculator on the Arborlogix website to determine tree protection zones of trees on development sites in Australia.

The AS 4970-2009 Calculator is a free web app based on the Australian Standard ® AS 4970-2009 Protection of trees on development sites. The calculator allows you to calculate tree …

Use our custom TPZ and SRZ tree calculator tool. Find the encroachment value of a tree to your property or proposed development.

Tree Protection Zone (TPZ) or Structural Root Zone (SRZ). The result is a measurement of the radius (R) of a circle taken from the centre of the trunk. For complex situations there is a great …

Arbormatic is a web-based tool that creates Development Reports with built-in TPZ / SRZ Calculators and provides the ability to create your own customised Arborist Report Templates. …

The TPZ or RPA is a designated area around a tree that is protected when nearby works are being undertaken to preserve the soil and tree. The area is usually calculated by multiplying …

Calculates tree protection zones (TPZ) and structural root zones (SRZ) Calculates two types of encroachment. Smartphone optimised. Easy to use in the field. Free to use

Tree Protection Zone (TPZ) and Structural Root Zone (SRZ) are critical areas around trees that help protect their health and stability, especially during construction or development. The TPZ …

The calculator will give you both the TPZ radius and area, as well as the SRZ radius. If you have a single stem tree, simply add the DBH in metres (e.g. 350mm = .350) to the Total DBH box …

Online calculator for working out the DBH, Tree Protection Zone (TPZ), Structural Root Zone (SRZ) of trees to assist with protection of trees on development sites