Questions & Answers

What is necessary to calculate a wind load affecting my tree?

You need to fill a form by following information and attach a digital picture of the tested tree.

Basic data:

Tree species
Height of the tree
Diameter of the stem (DBH)
Bark thickness

Site characteristics:

Country
Region (County)
City
Elevation
Maximum wind expected
Temperature average

Explanations for all values to be entered are in the form.

Do I need to use metric unit system for entering my data?

No, you can choose between the use of the Metric system and the Imperial unit system. The choice is made during the process of registering a new user and can be temporarily changed for a single new tree analysis.

What tree species can be analyzed?

In general only broadleaves and conifer trees can be analyzed (not palm trees or bamboos). There are no reliable wood material properties values for some less common tree species. In this case values of anatomically similar tree species will be used.

When will I get results of the tree stability?

Results are calculated at the Department of Wood Science at the Mendel University of Argiculture and Forestry, Brno and will be sent to your e-mail address within 48 hours from receiving your order.

What is the result of the analysis?

As a result you will get the following information (for details see Sample output at the home page):

Wind load analysis according to DIN 1055/1056
Material properties characteristics for the tree species in question
Calculation of the own weight of the tree in question
Calculation of the breaking resistance at defined heights on the stem
Calculation of the torsion resistance at defined heights on the stem
Calculation of the necessary residual wall thickness at defined heights on the stem

The resulting values are calculated for a theoretical stem assuming sound defect-free wood. Should any defects be suspected (cavity…weak forks etc) then it is necessary to complete a failure probability assessment through using an estimated strength loss formula or by use of a device supported test.

What kind of device can be the wind load analysis combined with?

According to the Triangle of tree statics can be this analysis combined with any device, which is able to provide the rest of information (residual wall thickness, material changes within the stem) or even with the visual assessment. See the Sample output to see possible application. Primarily was the wind load analysis developed for use with the Pulling test method (Wessolly, Erb, 1998), but combination of virutally any other device is possible.

Is it possible to use the Wind Load Analysis for multi-stemmed trees?

No, unfortunately not at this stage. Only single-stemmed trees can be analyzed by the methodology currently used.

How is possible to pay for the service?

Each tree evaluation is charged for on an individual basis using your credit card. We accept MasterCard®, Maestro® and Visa®. For customers demanding an analysis of a larger population OR a greater number of trees a pre-paid service will be available soon. For demand of this service and for conditions contact info@windloadanalysis.com.