Before tree trunks become columns
Tree trunks from Staatsbosbeheer (Dutch Forest and Nature Reserve) are being inspected. A pictorial report.
8 numbered tree trunks to be assessed
Taking first tree trunk to assessment place
Manual resistance measurement with knife
Tree trunk overview
Head side of rejected tree trunk with fruiting body of brown-rot fungi
Peeled side of rejected tree trunk with fruiting bodies of brown-rot fungi
Mechanical resistance measurement with resistograph
Graphical result of resistograph
Measuring cracking pattern of brown rot
Analysis of the penetration depth and spreading of the rot
Healthy tree trunks
Decay caused by fungi permeating the fibrous structure of the wood
Curve measurement by yellow twine
Selected trees are nearly straight
Turning of new tree trunks for peeling
Fresh douglas wood to replace the two rejected tree trunks
End of the tree trunk with tree code of Dutch Forest and Nature reserve
Finishing of first assessment
From 15-17 meter trees only 9 meter is needed for the columns...
...and the rest is being sawn into bars by Rusman...
...to be used as deck edge of the GTB Lab.
Inspection of leftover wood pieces turned into timber for deck edge of GTB Lab
28 pieces of 310 x 30 x 10 cm douglas