TreeQinetic - Static Tree Pulling

There are two majors types of tree failure: uprooting and breaking.

The Picus: TreeQinetic system measures data that can help to calculate
uprooting and breaking safety.

A so called “pulling test ” can be used to assess the breaking and uproot safety of a tree by pulling it with a cable using a known force (measured by forcemeter) and simultaneously recording its reaction. The TreeQinetic system uses wireless linked sensors for fast & easy pulling test measurements.

Tree pulling tests were developed at the University of Stuttgart in the 1980's and 90's by a team around Lothar Wessolly and Günther Sinn. The results can be evaluated according to Static Integrated Methods, e.g. the Elasto-Inclinomethod.

Traditional tree risk assessment is focussed on determining the extent of cavities or hollowness in tree trunks by boring holes. Using these invasive tree assessment methods can not only damage living cells but may also encourage fungal growth (LIESE, DUJESIEFKEN, 1996) and the spread of decay. New engineering based statics integrating methods (SIM) developed by WESSOLLY and SINN at the University of Stuttgart allow for non-invasive and precise assessments of a tree´s breaking and uprooting safety.
Statics integrating inspections are carried out with pulling tests (elasto-inclino method) that exert a wind substituting load on the tree usin g a winch and a steel cable. The reaction of the stressed trees under a defined load is measured with high resolution devices (elastometer and inclinometer) and the data obtained are compared with those of sound trees. In all safety calculations using the SIM, three major components are considered: wind-load, material properties of green wood and the surface of the load
bearing structure (trunk diameter, extent of hollowness). Tree inspectors and practitioners may use a more simplified variation, the SIA method ( statics integrating assessment) which also follows international engineering conventions and allows for quick on-site-assessment at little cost.

Dynamic Sway Motion logging.

TreeQinetic Inclinometers and Elastometers can be used to record dynamic sway motion of the tree in winds.
An essential criterion for good roots is that the tree returns continuously to its origin when swaying in winds.

Basic and Pro kits are available along with comprehensive analysis software and training.

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