Bad luck bar
As misfortune bar refers to trees branches that have been unduly burdened by its own load, so that occur on them longitudinal cracks. Such a branch will break in the near future. For reasons of traffic safety , countermeasures must be taken immediately if such a damaged branch is across a path or the like. The cause of the crack are tensile stresses across the grain of the wood , twisted growth promotes the appearance of this damage pattern.
Individual evidence
- ^ Andreas Roloff : Trees: Lexicon of practical tree biology, ISBN 978-3-527-66120-6 , p. 172.
- ^ Karlsruhe Institute of Technology. "The biomechanical and legal identity of twisted growth and potential bad luck bar" (PDF; 931 kB).