Equation used for braced columns K<1.0 2 tan 2 1 1 0 4 2 tan 2 Ga Gb Ga Gb K K K K K π π π π π ⋅ + ⋅ ⋅ + ⋅ - + - = ⋅ Equation used for unbraced columns K≥1.0 ( ) 2 36 0 6 tan Ga Gb K K Ga Gb K π π π ⋅ ⋅ - - = ⋅ + The alignment charts give the approx. solution to the previous equations Use a solver like the Hp48g calculator and give a initial value , (Braced K<1.0 or unbraced K>1.0) to obtain a the factor. Coxxxyboy 2013
