lightning struck trees

So, i was wondering how a lightning struck tree is normally handled. I checked a job where a beautiful black walnut was hit. The walnut has 3 main leaders, the tallest one was hit resulting in a spiral of blown off bark (about 4" wide) trailing down the leader, than down oppasite sides of the trunk. There is a hole in the ground where the lightning exited the tree about 8" deep. On the trunk, there is a crack that has opened about 1/8" on opposing sides.

As i wrote earlier, this is a beautiful old tree that was very healthy, about 4' DBH, 90' tall, with a 40' spread.

What is your normal proticol for somthing like this?
Do i check for root damage, peel back the bark to see how much cambium is still intact, and bark trace, schedule for removal, or install lightning protection?

How can i tell how much damage is actually done?

ill try to post some pictures tomorrow.

ps. the tree is on a property line, one neighbor wants it down, the other would like to keep it, unless its unsafe.

thanks for the help
 
Talk to Guy Meilleur (GuyMayor on the Buzz). I have a lightening struck Q. falcata to inspect Saturday. It's huge for around here, nearly 60"dba. I plan to clean out the broken central leader and shoot pics to send to Guy.
 
[ QUOTE ]
I plan to clean out the broken central leader and shoot pics to send to Guy.

[/ QUOTE ]cmon blinks diay!

Here, freely available on the ISA website, a protocol and case studies http://www.isa-arbor.com/publications/Lightning/Summaries/Meilleur7.2.07_LP_edit.pdf

and here is the presentation; not worth much without notes --sorryaboutdat! http://www.isa-arbor.com/publications/Lightning/PdfPresentations/Meilleur_LightningMitigation.pdf

and here is Coder's 2004 look at it; as usual, good info on the basic science but not much on the application part.
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http://www.isa-arbor.com/publications/arbnews/jun04/feature5.aspx

O and in October Detective Dendro, Codit and uberarborist Electra Cline will have something to say on this too so stay tuned...
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What's diay?

I figured you might be able to devine a little more than I about the tree's future. No way I'll take it down without a definite condemnation by someone smarter about this stuff than me.

The ISA article is excellent... you know me, I don't want to look things up, I just want you to tell me what i want to hear.

First thing is inspection, I'm pretty sure it will pass the 1/3 criteria, the visible damage is isolated to the top but a good 35' or 40' of top central leader is toast, mostly shattered and hung up. I'll take my rubber mallet and some scribing tools when i go up. Gonna take Bryce on this one, it will be the biggest tree he's climbed so far.

The bad thing is, this house will soon be in the hands of the bank. It was foreclosed but the owner, a person of great integrity, wants make the tree safe for her neighbors before she's gone. Anyway, followup will be iffy although I'll have contact with the neighbors.

What do you think of the fissures on opposite sides of HammerTree's walnut? Could the trunk be split clean through?
 
"What's diay?

do it all yourself

"I don't want to look things up, I just want you to tell me what i want to hear.

I want the same sometimes; gotta get beyond that. hope the summary article is worth the time and trouble of reading.

"I'll take my rubber mallet and some scribing tools when i go up.

Claw hammer does most of the assessment work; no need to do the fine trimming (linoleum knife or chisel with rounded corners) until you're sure the tree is staying--per the summary.

"What do you think of the fissures on opposite sides of HammerTree's walnut? Could the trunk be split clean through?

theoretically yeah but cant tell anything without probe, or at least a pic. Tree #263 at Andersonville was split into quarters; attached. even if so not all cracks are fatal, tho for the walnut it could hurt log value at harvest.
 

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"What do you think of the fissures on opposite sides of HammerTree's walnut? Could the trunk be split clean through?

Not good.
2 yrs ago I was called to examine a 80 ft mature white fir that was struck with lightning about 2/3rds of the way up. When I climbed up I noticed horizontal cracks on both sides of the trunk at the injury. After a few expletives, I tip-toed back down and informed the homeowner to place a 80' No-Entry zone around the tree. A few days later a wind storm snapped the tree off!
 
okay, so here are some pics, hopfully i can get more than 1 a post. they might not be the best, blackberry photos
 

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this stem is what the lightning hit, hard to see because of the rain, and pic, but im pretty sure that stem is cooked
 

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pretty ugly down low, can't see crown damage in that pic.

first step in the Summary is to do the tap test on the lower trunk, see what " of bark is detached, and what " is still stuck to the wood. then probe the cracks with something very thin.
 

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