I'd like to build a bumpout for a fireplace and have a few questions on the structure requirements.
The bump-out depth needs to be 20" to accomodate the fireplace. The I-beam floor joists (i-joists?) run parrellel to the wall which needs the bump out.
What are my option here to support the bumpout if I can't cantilever the floor joists due to the parrellel joists supporting the current floor? I don't really have the option of cutting into these i-joists and doubling them as they are 24' long.
Can I attach the floor joists of the bump out to the house's rim joist with galvanized hangers and then nail on a 2x6 from the furthest edge, 45 degrees back to the current house wall and build the bump out wall around this support?