ISO 13061-4 is Part 4 of the ISO 13061 series of test methods for small clear wood specimens. It specifies a method for determining the modulus of elasticity of wood in static bending by measuring the deflection at mid-span of a simply supported beam.
Wood science and timber testing labs use it to compare the bending stiffness of species or lots on defect-free specimens. Its companion, ISO 13061-3, uses the same simply supported beam arrangement to find ultimate bending strength from the breaking load, so the two parts can be planned together. Accurate deflection measurement at mid-span is central to the result. The 2014 edition is current and was confirmed by ISO at its last review.
The test is run on a universal testing machine with a three-point bending fixture and a way to measure mid-span deflection. Our grips and fixtures for wood testing support static bending tests to ISO 13061-4. If you need help matching ISO 13061-4 requirements to your parts or setup, contact our team.
