Calculating section factors - SteelConstruction.info
A m = 2h + 4b + 2πr - 8r - 2t w where h, b, r and t w are defined as shown to the right. (2*528.3) + (4*208.8) + (π*12.7*2) – (8*12.7) – (2*9.6) = 1851mm or 1.851m The cross-sectional area from The Blue Book is 105cm² or 105E-4m² The section factor is therefore 1.851/105E-4 =176.3m -1 This is usually rounded up or down to the whole number.
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