I have a 40' x 60' shop. I am thinking about building a mezzanine for extra storage along one of the walls. It would be around 30' long by 8' wide. Would 2x6 for the joist and load wall work? And what spacing should the joists and studs be?
Depending on how much weight you're planning on putting up. I would suggest beefing up your joists to 2x8 or 2x10 16" on center. 2x6 wall is fine, I would layout your wall with the same layout that your floor is going to be that way under every joist you will have continuous bearing down to the concrete.. 30' is a pretty good span if you want to minimize your posts you may want to consider a lvl flush beam and cut out and pour some proper footings for under your posts.
The best way to approach this is by contacting a structural engineer, as you will need permit to build any mezzanine unit, drawings will be required also you will need to give the engineer the type of load you expect on the mezzanine.
There is many approaches to building a mezzanine depending on loads, from metal frame, lvl's, sistered beams etc..
Good luck with your project.
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