gardening. landscaping. greendesign.

12 - 15 September 2018 // Nuremberg, Germany

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Zoom product LOGO_TreeQinetic – Load tests

TreeQinetic – Load tests

LOGO_TreeQinetic – Load tests

TreeQinetic – Load tests

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The TreeQinetic system is used to carry out load tess (or pull tests) on trees for which an advanced tree risk assessment is needed. The TreeQinetic load test is measuring both the bending strength of the tree stem and the anchoring strength of the tree root system.

The tree pulling test method has been developed by Günther Sinn and Lothar Wessolly in the mid 1980's.

During a pulling test, a load (substituting for the wind) is exerted on a tree using a winch and a steel cable. The reaction of the stressed tree under this defined load is measured with high resolution devices (elastometer and inclinometer), and the data obtained are compared with those of sound trees. The major components to be considered in such calculations are the wind-load (the surface of the load-bearing structure, tree height, etc.) and the material properties of green wood.

The TreeQinetic Elastometer measure the strain of the marginal wood fibers of the trunk. TreeQinetic Inclinometer measure the tilt of the root plate. Those data recorded is being processed using the arbostat analysis software ( The arbostat software compares that data with the result of the wind-load analysis of the tree.

The result of the calculation is displayed in diagrams that show the stem-breaking safety and root stability of the tree. In case the safety margins calculated are too low the arbostat software recommends measures for crown reductions.

The TreeQinetic instruments for load tests measure precisely the reaktion of the tree to the pulling load. Up to nine Sensors (Elastometer, Inclinometer, Forcemeter) can be used at the same time. All data is continuesly recorded at the connected PC. The sensors can be connected wirelessly using a zigbee-radio connection or by cable.

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