We attended a 2 days course to learn how to conduct Trees inspection as second level / Advanced level . Here are some arbor tools such as Resi (Resistograph) and PiCus (tomograph) used for tree inspection. I uploaded this video just to share as knowledge & pls take note that all Arbor Tools & Teaching materials are belonged to Nparks 🤗🤩 #ArborTools #Vwaytoke #UrbanHorticulture #picus #resi #arbortools #treesinspection #RESISTOGRAPH #PiCUS-Sonic-Tomograph

RESISTOGRAPH
Resistograph is a mechanical resistance measurement device, developed by Frank Rinn (since 1986 in Heidelberg, Germany).Driven by a drill motor, a long, thin needle is inserted into a wood log or structural wood beam in order to gain an idea of its density, often to identify areas of substandard structural integrity such as decay. Variations in resistance to torque are recorded by a stylus on graph paper. Newer models may record information digitally but the purpose of the instrument is the same.

PiCUS Sonic Tomograph
A PiCUS test is used for tree risk assessments to determine the extent of internal decay or cavities throughout the stem of a tree. This is done by sending soundwaves through the wood; the density of the wood (extent of decay) is determined by how fast the sound travels through the wood.

References : (1) Nparks, Singapore
(2) Wikipedia

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