Climbers' Corner • Tree Academy
Monday • Tuesday • Wednesday
How Tree Biomechanics Influences Tree Stability
Summary
A double diameter can carry eightfold loads: thus, shape and size of a cross-section are more important than material properties, such as stiffness and density.
A defect covering 20% of a cross-section can lead to 60% strength loss, while 60% loss of cross sectional area can mean only 20% less load carrying capacity;: thus, location of decay is far more important in terms of strength loss than size of the defect.
Consequently, a basic understanding of biomechanical properties is prerequisite for being able to assess relative strength loss due to decay in trees and to evaluate safety and risk. In addition, depending upon the tree, the site, and all other conditions, the most appropriate method for examination has to be selected.
Presenters
Frank Rinn
1982-1988 Physics study at Giessen and Heidelberg University
1986-1988 Diploma thesis at tree-ring lab of Hohenheim University
1988-present RINNTECH: development of equipment for tree and timber inspection, as well as wood and tree-ring analysis.
Inventor / developer of:
RESISTOGRAPH(R) resistance drill
Arbotom(R) sonic tomograph
LINTAB tree ring stage
DynaTim dynamic tree analysis
ISA
2001- ISA Chapter Germany Executive Director
2011- ISA Board Of Directors
Climbers' Corner • Tree Academy
Monday • Tuesday • Wednesday