Has anyone replaced an external wall with bifold doors? I'm looking to do this in the new year and hoping to get some insight on it. I won't attempt this by myself but hoping to get a builder that's friends with the family to do it, time permitting. Will I need a structural engineer, draftsman or anyone other than a builder to have this done? The house is steel framed with a brick veneer, we plan on knocking out about 5m and putting in a 5 panel bi-fold leading into a deck. Obviously we'll need to shore up the wall to support the roof, I'm not familiar with steel frames but I'm assuming a big steel beam is in order here? I've got very little clue when it comes to structural renovations so I'm hoping to learn how to approach this project.