Comments on: Discussion: Potential tree failure makes for difficult decisions http://www.gufc.org/http:/www.gufc.org/discussion-potentail-tree-failure-makes-for-difficult-decisions/ Sustaining Georgia's Green Legacy by Helping Communities Grow Healthy Trees Mon, 26 Jul 2010 15:03:08 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Onebark, LLC http://www.gufc.org/http:/www.gufc.org/discussion-potentail-tree-failure-makes-for-difficult-decisions/comment-page-1/#comment-9 Onebark, LLC Tue, 13 Oct 2009 20:05:03 +0000 http://www.gufc.org/?p=597#comment-9 As a clarification, the casual research I performed was in regards to tree failures during the slew of high-wind weather events in April of 2009 only. We were seeing loading speeds of over 50 mph, which is very unusual. Of those failures that I recorded, 67% had a defect, but only 38% had a defect that was plainly visible prior to failure. Twenty-three percent of the failures did not have an quantifiable defect at all. As a clarification, the casual research I performed was in regards to tree failures during the slew of high-wind weather events in April of 2009 only. We were seeing loading speeds of over 50 mph, which is very unusual.

Of those failures that I recorded, 67% had a defect, but only 38% had a defect that was plainly visible prior to failure. Twenty-three percent of the failures did not have an quantifiable defect at all.

]]> By: Ed Macie http://www.gufc.org/http:/www.gufc.org/discussion-potentail-tree-failure-makes-for-difficult-decisions/comment-page-1/#comment-8 Ed Macie Tue, 13 Oct 2009 17:05:50 +0000 http://www.gufc.org/?p=597#comment-8 Emphasis should be placed on "visual". To accurately complete the statement: "95% of the trees that fail have some type of defect which results in that failure. Those defects may not be visable in 35% of all failures." Decisions to remove trees should be based on the best available science, and application of a hazard rating that considers, the tree part(s), likelihood of failure, and target potential. Ed Emphasis should be placed on “visual”. To accurately complete the statement: “95% of the trees that fail have some type of defect which results in that failure. Those defects may not be visable in 35% of all failures.”

Decisions to remove trees should be based on the best available science, and application of a hazard rating that considers, the tree part(s), likelihood of failure, and target potential.

Ed

]]> By: Neil http://www.gufc.org/http:/www.gufc.org/discussion-potentail-tree-failure-makes-for-difficult-decisions/comment-page-1/#comment-7 Neil Tue, 13 Oct 2009 15:36:35 +0000 http://www.gufc.org/?p=597#comment-7 38% seems awfully high, in speaking with a consulting arborist in Atlanta, the number of trees he has observed with no sign of defect is closer to 5%. Resistagraph testing might also reduce the percentage of trees where no defect was visible. 38% seems awfully high, in speaking with a consulting arborist in Atlanta, the number of trees he has observed with no sign of defect is closer to 5%. Resistagraph testing might also reduce the percentage of trees where no defect was visible.

]]>