Hi, and welcome. First off, is it a standard form made by a manufacturer? If so they should be able to give you the needed load information.
If not then the answer to your question is "no."
It gets tricky in breaking the section into simple shapes and adding them together. Not quite as simple to do as that explanation.
Give us a better idea if what you are trying to do and we can give a better idea on how to go about it. A picture paints a thousand words.