SIA  Tree Stability Assessment
Inputs
Tree species Program Sponsor:

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Tree height (m)
Trunk diameter (cm) 1. 2. (optional)
Bark thickness (cm)
Location
Avenue tree   Distance between trees (max. 1/3*height) (m)   
Crown shape
Slight cylinder at trunk

Ellipsoid at trunk
Spherical crown at trunk
Heart shaped crown
Special crown shapes:
Lombardy Poplar
Conifer
If there are still doubts about the safety status of the tree despite the SIA, we recommend a detailed examination using the statically integrated Elasto/Inclino method in accordance with the FLL Guideline Tree Inspection 2020.
This method is not suitable for young trees due to low cw values and changed vibration behavior. For multi-trunk trees, the section modulus of an individual trunk must be determined proportionally using the cumulative section modulus of all trunks


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SIA-Methode: Dr. Ing. Lothar Wessolly, Nittelwaldstraße 22, 70195 Stuttgart, Deutschland   www.arboa.com
Programmierung: Brehm & Fritsch GmbH, Bachstraße 14, 15741 Bestensee, Deutschland