Use these tools to calculate the Tree Protection Zone (TPZ) or Structural Root Zone (SRZ) of a given tree, additionally you can determine the degree of TPZ ...

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 protection zones (TPZ/SRZ) and two types of encroachment. The calculator accepts circumference or diameter ...

The area is usually calculated by multiplying the DBH (trunk diameter at a given height) by 12, e.g. if the DBH is 50cm then the TPZ will usually be 6m radius ...

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

A valuable tool designed to facilitate architects, landowners, developers, and consultants in understanding the potential rooting area of trees on their land.

EGN 425: Tree Protection Zone and Structural Root Zone Calculator. 3, Note: Must be used in conjunction with AS 4970 Protection of trees on development sites.

This calculator provides a table to determine the TPZ radius for single stemmed trees and second table for multi stemmed trees.

TREE PROTECTION ZONE CALCULATION TABLE. TRUNK. DIAMETER. (DBH). 10 CM & UNDER. 11-30 CM. MINIMUM PROTECTION DISTANCE. REQUIRED (MEASURE FROM THE. OUTSIDE EDGE ...

DBH, TPZ and SRZ Calculator · Tree Protection Zone (TPZ) · Structural Root Zone (SRZ) · DBH for multi-stemmed trees · TPZ Encroachment · TPZ Corner Encroachment.