1. The problem statement, all variables and given/known data This isn't homework, but I thought I would post it here as maybe more people would see it, and as I am not an engineer, it requires someone with more experience. The section is effectively an I beam with a hollow u shaped fitting along the top (see my rough sketch). I just need to know how to work out the maximum load at the end of the structure, as if it was cantilevered. I have Z, and dimensions of the materials. 2. Relevant equations ___ / \ -------- | -------- 3. The attempt at a solution I probably have to calculate the moment of inertia, would it be somewhere towards the top of the "I" beam?