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T4.5 Girth

The girth of a tree is ‘‘the circumference of the stem measured at 1 metre above ground level.’’ Usually this measure applies to standard trees, but girth grades can be given for large Feathered trees.

GIRTHS FOR CLEAR STEM STANDARD TREES
cm		Form	Marking colour
					MEASURING THE GIRTH OF A STANDARD TREE
6-8		Light standard	blue
8-10		Standard	yellow
10-12		Selected Standard	red
12-14		Heavy	white
14-16		Extra heavy	blue
16-18		Extra heavy	yellow
18-20		Extra heavy	red
20-25		Semi mature	white
25-30		Semi mature	blue
30-35		Semi mature	yellow
35-40		Semi mature	red
40-45		Semi mature	white
45-50		Semi mature	blue

For trees above 50 cm girth, the measure increases in 10 cm steps, 50-60, 60-70, etc.

The colours indicate the European colour system for marking trees.

 

Girth for Feathered trees When the girth size is greater than 6 cm it should be specified as for clear stem standard trees, e.g. 6-8, 10-12, etc. Multi Stemmed trees For these trees, the number of stems required must be specified and the height of the tree. Bushy Trees Due to the many stems of bushy trees, these trees should only be specified by height.

MULTI STEMMED (Alnus glutinosa)

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