Recently in my email inbox, there has been some discussion on hanging posted signs on live trees with aluminum nails.  I've read that using aluminum nails does negligible damage to the tree. 

The computer screen background on this webpage is a nice array of taphole maple lumber.  The taphole causes an injury and a stain column forms above and below the hole.  The length of the stain column appears to be proportional to the size of the taphole.  Smaller holes appear to lead to a shorter stain column. 

Consider that a 5/16" diameter drill bit might cause 25 cu. in. of stained wood when hole depth is 2".  That's a hole volume of about 0.153 cu. in. giving rise to 25 cu. in. of stained wood.

An 11 ga aluminum nail has a diameter of 0.12".  Let's say that we need to pound the nail in 1" to effectively hang a sign.  That's a hole volume of about 0.011 cu. in.(per nail!), which is about 14 times smaller than the taphole considered above.  If a 5/16" diameter hole in 2" deep gives 25 cu in of stained material, then it might be reasonable to assume that a single 11 ga aluminum nail wound would give 25/14 or about 2 cu in of stained material.  If you need 4 nails to hang a sign, that's 8 cu. in. of stained wood.  Use 8 nails and the damaged area grows to 16 cu. in., which is approaching the damage of a taphole.

Now, there are a lot of assumptions here!  But it seems that using nails of any variety might cause "significant" damage to sawtimber.  Please poke holes (pun intended!) in my argument and/or point to research.

Views: 604

Reply to This

Forum

Verticillium Wilt

Started by Carl DuPoldt in Forest Health Jul 9. 0 Replies

Verticillium Wilt - https://mailchi.mp/unl.edu/nebraskas-forest-health-report-july-2019 Symptoms of Verticillium wilt are now becoming apparent in infected trees in…Continue

Silvopasture in Wisconsin: Goals, Challenges, and other Fodder for Thought

Started by Carl DuPoldt in Agroforestry May 9. 0 Replies

Silvopasture in Wisconsin: Goals, Challenges, and other Fodder for ThoughtWednesday, May 29, 2019 at 11:00am (CDT)Diane MayerfeldSustainable Agriculture Coordinator, UW-Extension, Center for Integrated Agricultural Systems (CIAS) -…Continue

Small acreage logging project

Started by WJ Rodenhouse in Woodlot Management. Last reply by Lew Ward Apr 22. 1 Reply

A friend asked me what types of protections he should include in agreement with logger when having his 10 acre forest logged. I thought maybe some of you could provide insight. Logger stated Workman's comp wasn't needed in a family business.Thanks!Continue

Western Larch Question

Started by Alex Harmon in Wildlife Management. Last reply by Pamela Dallaire Mar 30. 2 Replies

Would a Western Larch (tree) NOT lose its needles during fall and winter if it was kept indoors? / what causes it to lose its needles(temperature change, change in length of days)? IF YOU KNOW THE ANSWER PLEASE REPLY!!!!!! NOT KNOWING IS KILLING ME!!Continue

How tree diversity affects invasive forest pests

Started by Brett Chedzoy in Woodlot Management. Last reply by Brett Chedzoy Mar 27. 1 Reply

A long-standing tenet in forestry is that healthier and more diverse woods are typically more resilient to stress factors and pest.  This holds true in most cases, but there are the notable exceptions like EAB.This article from the "Morning Ag…Continue

480a disqualification after EAB

Started by Bill Pontius in Woodlot Management. Last reply by Bill Pontius Mar 17. 4 Replies

Here's a hypothetical question (hopefully). If an ash stand no longer has sufficient density to qualify for the 480a program following ash borer invasion, and if that stand is necessary for having more than 50 acres for the program, what happens?…Continue

Renewable Jet Fuel from Woody Biomass

Started by Brett Chedzoy in Woodlot Management Feb 27. 0 Replies

The carbon footprint of air travel is currently being scrutinized in the news.  Here's a renewable energy angle that probably won't be covered in the mainstream media: …Continue

Badge

Loading…

© 2019   Created by Peter Smallidge.   Powered by

Badges  |  Report an Issue  |  Terms of Service