This part of ISO 11093 specifies a three-point method for the determination of the bending strength of cylindrical board cores which meet the following criteria: internal diameter 50 mm to 300 mm, minimum wall thickness 5 mm, minimum test length of core (span) 1100 mm.
DIN ISO 11093-6:2005 Referenced Document
ISO 11093-1 Paper and board - Testing of cores - Part 1: Sampling
ISO 11093-2 Paper and board - Testing of cores - Part 2: Conditioning of test samples
ISO 7500-1 Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force-measuring system*, 2018-02-01 Update
DIN ISO 11093-6:2005 history
2005DIN ISO 11093-6:2005-09 Paper and board - Testing of cores - Part 6: Determination of bending strength by the three-point method (ISO 11093-6:2005)
2005DIN ISO 11093-6:2005 Paper and board - Testing of cores - Part 6: Determination of bending strength by the three-point method (ISO 11093-6:2005)