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1st November 2009, 06:01 PM
| #61 |
| Monument Status  Join Date: Feb 2007 Location: Townsville Nth Queensland & Gold Coast Sth Queensland
Posts: 1,985
|  Re: AS4970 Draft| Australian Development Tree Protection
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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1st November 2009, 06:54 PM
| #62 |
| Admin - Razor sharp and independent 2 X Diploma Level 5 qualified arborist  Join Date: Jan 2007 Location: Brisbane
Posts: 12,792
| Re: AS4970 Draft| Australian Development Tree Protection
From the center of the trunk. So if you are measuring to the trunk always remember to adjust if need be. 
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1st November 2009, 08:05 PM
| #63 |
| Monument Status Join Date: Feb 2007 Location: Townsville Nth Queensland & Gold Coast Sth Queensland
Posts: 1,985
| Re: AS4970 Draft| Australian Development Tree Protection   |
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1st November 2009, 08:19 PM
| #64 |
| Semi-mature vigorous tree  Join Date: Feb 2008 Location: Australia
Posts: 218
| Re: AS4970 Draft| Australian Development Tree Protection
Sorry thats what i ment honest  SRZ is calculated as diameter?
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1st November 2009, 08:20 PM
| #65 |
| Monument Status Join Date: Feb 2007 Location: Townsville Nth Queensland & Gold Coast Sth Queensland
Posts: 1,985
| Re: AS4970 Draft| Australian Development Tree Protection
No as radius, my diagram is showing DBH and TPZ not SRZ
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1st November 2009, 08:23 PM
| #66 |
| Semi-mature vigorous tree Join Date: Feb 2008 Location: Australia
Posts: 218
| Re: AS4970 Draft| Australian Development Tree Protection
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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2nd November 2009, 08:37 AM
| #67 |
| Semi-mature vigorous tree Join Date: Feb 2008 Location: Australia
Posts: 218
| Re: AS4970 Draft| Australian Development Tree Protection
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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3rd November 2009, 05:58 PM
| #68 |
| Admin - Razor sharp and independent 2 X Diploma Level 5 qualified arborist Join Date: Jan 2007 Location: Brisbane
Posts: 12,792
| Re: AS4970 Draft| Australian Development Tree Protection
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 
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15th April 2010, 08:34 PM
| #69 | |
| Admin - Razor sharp and independent 2 X Diploma Level 5 qualified arborist Join Date: Jan 2007 Location: Brisbane
Posts: 12,792
| Re: AS4970 Draft| Australian Development Tree Protection 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. 
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