User talk:2601:18C:4200:60F0:E829:D3F3:E4FD:5F86

The article says the deflections must be less than 10% of the span, but I think the correct limit is that the deflection must be less than half the thickness. See Roark's Formulas for Stress and Strain, 7th edition section 11.11 pages 448-450.