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Wood Strength - a physical test

Depending on which Fractometer version (Fractometer I / II or Print) you use, one can determine the values of the fracture and compression strength in wood core samples.
With the corresponding Fractometer table it is possible to quickly determine and compare the wood quality. This table enables you to evaluate the stability and the wood properties of the tree.
Note:
The values given by the table are only standard values; the tree must always be seen as a whole.

Measuring Method
The Increment Borer is used to quickly get informative core samples from the wood that is to be inspected. For the measurement of the bending fracture and compression strength the wooden cores are clamped in the corresponding aperture of the Fractometer. Thus it makes objective statements about the strength and stability of the wood possible.

Increment Borer
Extraction of core samples

  Length: 300 or 400 mm
  Extraction of core samples (diameter 5 mm)
  Visual assessment of the core samples for substantial
  information about the rate of growth and compartmentalization
  of decay
  Sturdy and compact device
  High informational value
  Detection of discoloration’s in the wood
  Enables the microscopic evaluation of the wood

Fractometer I
Bending Strength Measurement

The Fractometer I is a pocket-size testing machine for wood. It puts bending load on a core sample that was taken with the increment borer. This way you can determine the bending moment, bending angle and bending energy. Furthermore, it is possible to identify the stage of damage caused by decay as well as the nature of its effects.

Fractometer II
Bending and Compression Strength Measurement

The Fractometer II is a mechanical measurement device that determines characteristic values of bending and compression strength of wood. The corresponding parameters are obtained by means of a core sample (diameter: 5 mm) that was taken from a wooden structure. In order to determine a characteristic strength value, the core sample must be inserted in the corresponding clamping device and then has to be aligned according to its fiber direction. To apply pressure to the core sample, the two lever arms have to be pushed slowly and continuously. The load has to be increased until the wooden core brakes. The Fractometer II measures the maximum strength that was applied. This force is equivalent to the failure load.

Fractometer Print  (Electronic version)
Bending and Compression Strength Measurement

The Fractometer Print is the electronic version of the Fractometer II and consists of an electronic and a measurement unit. The values of the bending fracture and compression strength are determined electronically and can be saved. The IML software P-Tools Pro helps you process these saved data. The electronic unit is connected with the measurement unit via cable and contains the electronic control, the printer and the power supply.