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| | #61 |
| PDF King & Arborist Extrodinaire Join Date: Feb 2007 Location: Townsville Nth Queensland & Gold Coast Sth Queensland
Posts: 2,129
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12 X DBH is the RADIUS of the Tree Protection Zone. So a 400mm DBH Euc gets a TPZ of 4.8m radius |
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| | #62 |
| Admin - Australia's most prominant Arborist - prev Ekka Join Date: Jan 2007 Location: Brisbane
Posts: 10,775
|
From the center of the trunk. So if you are measuring to the trunk always remember to adjust if need be.
__________________ Free Online Tree Value Calculator by TreeWorld Free Online TPZ and SRZ AS4970-2009 Calculator by TreeWorld Free Online Tree Surface Area and Tree Volume Calculator by TreeWorld ![]() My businesses:- Qualified Brisbane Tree Lopping | Stump Grinding Brisbane | Brisbane - Gold Coast Consulting Arborist | Project Arborist |
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| | #63 |
| PDF King & Arborist Extrodinaire Join Date: Feb 2007 Location: Townsville Nth Queensland & Gold Coast Sth Queensland
Posts: 2,129
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| | #64 |
| Semi-mature vigorous tree Join Date: Feb 2008 Location: Australia
Posts: 222
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Sorry thats what i ment honest SRZ is calculated as diameter?
__________________ "Just cause i don't use it, don't make it wrong!" |
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| | #65 |
| PDF King & Arborist Extrodinaire Join Date: Feb 2007 Location: Townsville Nth Queensland & Gold Coast Sth Queensland
Posts: 2,129
|
No as radius, my diagram is showing DBH and TPZ not SRZ
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| | #66 |
| Semi-mature vigorous tree Join Date: Feb 2008 Location: Australia
Posts: 222
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Ok both radius, i swear i saw one was diameter and one was radius. I'll post the bit that confused me tomorrow. And we can have a laugh Thanks
__________________ "Just cause i don't use it, don't make it wrong!" |
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| | #67 |
| Semi-mature vigorous tree Join Date: Feb 2008 Location: Australia
Posts: 222
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not sure what i was thinking you were right, of course
__________________ "Just cause i don't use it, don't make it wrong!" |
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| | #68 |
| Admin - Australia's most prominant Arborist - prev Ekka Join Date: Jan 2007 Location: Brisbane
Posts: 10,775
|
I made some lines on this graph to assist but have discovered it is way wrong. Refer to this thread. I also have built an online calculator for this equation. TPZ| SRZ| AS4970-2009 Online Calculator
__________________ Free Online Tree Value Calculator by TreeWorld Free Online TPZ and SRZ AS4970-2009 Calculator by TreeWorld Free Online Tree Surface Area and Tree Volume Calculator by TreeWorld ![]() My businesses:- Qualified Brisbane Tree Lopping | Stump Grinding Brisbane | Brisbane - Gold Coast Consulting Arborist | Project Arborist |
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| | #69 | |
| Admin - Australia's most prominant Arborist - prev Ekka Join Date: Jan 2007 Location: Brisbane
Posts: 10,775
| Quote:
Please note:- An amendment has been issued 26 March 2010 for the graph. It is available as a free download (you have to be logged in to get it though) here. AS 4970-2009/Amdt 1-2010 Protection of trees on development sites It's good to see they ruled it up similar to the way I ruled it up, also it appears to be accurate now. Better still, use the online calculator. ![]()
__________________ Free Online Tree Value Calculator by TreeWorld Free Online TPZ and SRZ AS4970-2009 Calculator by TreeWorld Free Online Tree Surface Area and Tree Volume Calculator by TreeWorld ![]() My businesses:- Qualified Brisbane Tree Lopping | Stump Grinding Brisbane | Brisbane - Gold Coast Consulting Arborist | Project Arborist | |
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