Wood resistograph
The cutting resistance test is performed using a flexible tungsten drill with a diameter of 1.5 mm with an upper cutting edge with a width of 3.0 mm, which is drilled into the tested wooden element at a constant rotational speed and feed rate. The torque required to maintain a constant rotational speed and feed corresponds to the cutting resistance of the wood. It is recorded and plotted with high resolution in relation to the depth of the borehole.
Work only through an authorized employee of the Department of Geomechanics, Civil Engineering and Geotechnics.
Order/contract/other form of cooperation upon agreement
The device allows you to register changes in cutting resistance. The decreases in the charts are associated with lower resistance, and thus lower density (e.g. related to biological corrosion, voids, cracks), which require less torque to cover the same distance by the drill. The high resolution of data recording allows the observation of density changes also within one annual increment
The drill feed speed is 40 cm/min and the resolution is 1/100 mm (dedicated to testing medium-density wood). The maximum measuring length is 44 cm.


Responsible body
Group / laboratory / team
Building structure diagnostics laboratory