Roark's formulas for stress & Strain

Roark's table has "Formulas for curved beams loaded normal to plane of curvature". The table shows values of for BETA =1.3. But BETA = (E/G) x (I/K) = 2.5 x (I/K). Or in other words K = 1.92(I). How in the world, we have sections, whose K value almost 2 times the value of I? I believe, the booK is not wrong. Where am I making the mistake?

Please help

Reply to
Loading thread data ...

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.