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AS4970 Draft| Australian Development Tree Protection

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Old 1st November 2009, 06:01 PM   #61
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Default 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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Old 1st November 2009, 06:54 PM   #62
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Default 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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Old 1st November 2009, 08:05 PM   #63
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Default Re: AS4970 Draft| Australian Development Tree Protection



Attached Images
File Type: jpg TPZ calc.JPG (25.9 KB, 137 views)
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Old 1st November 2009, 08:19 PM   #64
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Default Re: AS4970 Draft| Australian Development Tree Protection

Sorry thats what i ment honest

SRZ is calculated as diameter?
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Old 1st November 2009, 08:20 PM   #65
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Default Re: AS4970 Draft| Australian Development Tree Protection

No as radius, my diagram is showing DBH and TPZ not SRZ
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Old 1st November 2009, 08:23 PM   #66
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Default 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
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Old 2nd November 2009, 08:37 AM   #67
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Default Re: AS4970 Draft| Australian Development Tree Protection

not sure what i was thinking you were right, of course
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Old 3rd November 2009, 05:58 PM   #68
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Default 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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