dodecagon

[mykaltx]

Does anyone know the formula for calculating the weight of a dodecagon in steel? Such as a steel pole?

[Rassis]

Total weight (Kg) = Base area (cm2) x Height (cm) x Specific weight (between 7,8.10^-3 and 8,7.10^-3 Kg/cm3 depending on the alloy)

[Rassis]

In case the cross section is not constant and its width varies linearly along the height, replace "base area" in my previous post by "middle cross section area".