Hello, I am building and 11x17' lean-to structure on my property and I have a question regarding which type of flooring system will be cheaper. I have the option to use either a concrete slab (so no floor joists) or to elevate a floor joist system on blocks evenly spaced. It will be my wood shop and 1 side will be 12 feet tall and the other approx 8 feet (hence the lean-to). Which option for flooring do you all think will be less expensive? I am assuming doing the floor joist option would be cheaper but I am getting conflicting opinions from some folks Thanks!

I am working on a building where the previous owner had been in the process of adding a second story floor to a 500 sq. Ft add-on room. He secured the floor joists into holes cut into the cinder block wall on the east side of the room, but abandoned the project and left the other end of the joists resting on jacks on the west side. Now, I am left with the task of securing the joists to the BRICK wall on the west side and finishing the floor. The room was an add-on to a brick building and the previous owner used cinder block, so half the room is brick, the other half cinder. [U]THE QUESTION: I need some advice on how to secure the floor joists to the double brick wall on the west side of the room. I was considering bolting a long strip of angle iron to the brick and resting the joists on that.[/U]