Menu
Forums
New posts
Search forums
Terms and Rules
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Terms and Rules
Menu
Log in
Register
Install the app
Install
Forums
Tree Care Forums
Arboricultural Injuries and Fatalities
31-year-old tree trimmer killed in Elm Grove, WI accident
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Arborist Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="John Paul Sanborn" data-source="post: 1650148" data-attributes="member: 194"><p>When you cut a top, or large stem there is a push back force that may have been the cause of failure.</p><p></p><p>Yes, we tap, or sound a stem to judge condition; though hollow is not necessarily bad. If you have around 25% cylinder strength, you are still nominal. 20% without any opening is where we reach critical wall thickness; though I am more comfortable with 30% or greater.</p><p></p><p>Once you decide that it is sound enough to climb, you may want to not rig off of it, or go very small.</p></blockquote><p></p>
[QUOTE="John Paul Sanborn, post: 1650148, member: 194"] When you cut a top, or large stem there is a push back force that may have been the cause of failure. Yes, we tap, or sound a stem to judge condition; though hollow is not necessarily bad. If you have around 25% cylinder strength, you are still nominal. 20% without any opening is where we reach critical wall thickness; though I am more comfortable with 30% or greater. Once you decide that it is sound enough to climb, you may want to not rig off of it, or go very small. [/QUOTE]
Insert quotes…
Verification
Post reply
Top