This standard specifies methods for measuring the bending failure load and bending strength of ceramic tiles (hereinafter referred to as tiles). However, this does not apply to tiles whose sides are less than 50 mm.
JIS A 1509-4:2008 history
2014JIS A 1509-4:2014 Test methods for ceramic tiles.Part 4: Determination of modulus of rupture and breaking strength
2008JIS A 1509-4:2008 Test methods for ceramic tiles -- Part 4: Determination of modulus of rupture and breaking strength