TreeCalc is being used by arborists, consultants or officials to assess the safety situation of a tree instantly on site or to weigh the effects of decay or cavity. The safety calculation of the bearing capacity of tree stems is based on the local wind load situation, the stem´s size and its integrity (e.g. extend of decay, cavity).
Wind loads and their interaction with the quality of the stem wood can be assessed at low cost when using browser based TreeCalc.
You enter the parameters of your tree either via key board or with slider bars:
- Tree species
- Tree height
- Stem diameter
- Bark thickness
- Crown drag factor
- Compressive yield strength of green wood (reference values are being proposed)
- Desired factor of safety
- Wind speed
- Basic crown shape
- Modified crown shape
- Crown spread
- Height of crown base
- Terrain category (Eurocode 1)
As a result you obtain:
- Calculated basic strength of the stem
- The required minimum thickness of the wall
- The pruning contour (if crown reduction is recommended)
- Editable report with your own logo with all data and results
- History (all calculations are being stored for 3 years in a database, only accessible for the user)
- All invoices can be downloaded from the web server at any time
- Easy account fill up
- Metric and Imperial system
- Editable reports
Basis for the calculations
The wind load assumptions in use comply with Euro Code 1 (European standard EN 1991-4-1/NA:2012-12). The material properties of green wood used in TreeCalc originate both from what is known as the “Stuttgarter Festigkeitskatalog” (“Stuttgart Strength Catalog”; Wessolly, L. 1989) and from comprehensive studies conducted in the UK by Gwendolyne Lavers (The strength properties of timber. Building Research Establishment Report, HMSO, London. Lavers, G. M., 1983). TreeCalc can also help to assess the impact of cavities, notches or openings in tree stems.
When a calculation is complete, a safety factor is displayed. If crown reduction is necessary and feasible, a crescent-shaped crown reduction profile will also be shown with the specific parameters for reduction in m/ft and %. If TreeCalc recommends severe crown reduction at the risk of shortening the tree’s life span, it may be advisable to remove the tree completely. This recommendation should, however, always be carefully appraised.
TreeCalc supports both the metric and the imperial measuring system.
The limitations of the methodTreeCalc can only be a supplemental source of information to the initial visual inspection of a tree. TreeCalc has been developed for experienced users with substantial training in and knowledge of arboriculture and who also have a basic knowledge of tree statics.
The TreeCalc method helps to assess the failure risk of free-standing trees with stem diameters greater than 400 mm. This risk cannot be reliably estimated for younger trees, groups of trees or even stands of trees (e.g. forests).
TreeCalc is a state-of-the-art, independent software tool. Other similar calculation methods may give different results. This, however, does not mean that any particular method is superior to another.
29 € (incl. Tax) = 10 Calcs
49 € (incl. Tax) = 18 Calcs
99 € (incl. Tax) = 45 Calcs