Tree Survey / Report

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Survey/Report/Assessment

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DDD 200 Decay Detecting Drill.

This tool has a 1 mm diameter drill bit which is drilled into areas giving concern. Soft, decaying wood will give low resistance and therefore fast drilling times. If hollow, drill will fall into cavity. Speeds are recorded in the form of a graph. This technique is minimally invasive.

Some obvious defects below

VTA - reading the 'body language' of trees

Cavity on Chestnet has been filled with concrete Very Old practice

3 stems fail sweet chestnut.jpg (81045 bytes)

Inspection of very decayed Ash Glenmoriston (1).jpg (84881 bytes)

Ash Glenmoriston looks ok from here.jpg (89752 bytes)

Visual Tree Assessment

The first and most important approach to assessment, bringing to bear experience in the field along with a knowledge of current thinking as regards the ‘body language’ of a tree and the engineering principles underpinning successful growth.

Sound Impulse Hammer

Measures the speed at which a sound impulse travels through the section of tree selected. A fast and minimally invasive technique, providing good information. It is often the first tool to be used in assessing the extent of suspected decay in a tree.

Increment Sampler and Fractometer

Increment Sampler is drilled into tree and used to extract a 5 mm core, the strength of which is then tested on the Fractometer. This is a highly invasive and therefore potentially damaging procedure, however it can be necessary for the formulation of a conclusive analysis of timber strength in trees where there is little good wood left.

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Contact Iain Ogilvy, Inverness Tree Services Ltd 01381 610460

E-mail info@invernesstreeservices.com