Can I just say that:
What you show there is IMMENSELY hard to manufacture. In reality, this would be made by cutting two pieces of PFC or C-Channel beam and welding them together. If it is a structurally critical beam, you might need to connect the pieces with a couple of plates (one either side of the web) and a couples of bolt patterns (one for each C-Channel beam piece).
I am not a structural engineer. I would consider having a structural engineer draw out the beam connections as per the local code...