A brief case study by Tibor Horvath with Fakopp Pulling Test
Conditions
- The measured tree stood in a suburban garden and has been marked for removal.
- The removal has been turned into a series of 6 pulling tests. First we measured the tree in its original state, then before every additional pulling test some of roots have been cut.
- For the calculation of the safety factors, the wind speed of 33 m/s (cc. 120 km/h) has been used.
- The purpose of the experiment was to reveal the effect of cut roots on the safety factor.
Safety factor measurements
Intact: 1.19
Excavated: 0.86
1 root cut: 0.61
4 roots: 0.33
7 roots: 0.27
All 11 roots: 0.14
Results
