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I have a commercial space I am working on and would like to open up the wall between two rooms its a single story building, flat roof, concrete flooring. one room is 400 sq ft and the other is 600sq ft. I just want to open it up to the exterior wall one one side and where the thermostat sits on the other just before the hallway entrance. I have removed most of the drywall seen in the picture so you can get a good idea of all the studs i'll be removing. It seems there use to be two windows in this wall but then was just converted into a wall with a center opening. There is an 18inch beam under the joists running across the whole building to both exterior walls. Thanks in advance for the help!

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  • Hello, and welcome to Stack Exchange. You're going to have to talk to a structural engineer about this; we can't provide answers to questions that, if wrong, could collapse your building. – Daniel Griscom Jun 23 '16 at 11:08
  • Talk to a structural engineer, it is most definitely load bearing (2x6's under a supporting beam). As an aside if you would like more ceiling space, this will give you the chance to get a pocketed steel beam and remove the current wood beam. – Chris Jun 23 '16 at 14:24
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I would definitely assume the wall is supporting that beam. Get a structural engineer's advice to be sure, and to find out what your options might be. Solutions often exist, but may not be DIYable... and this is emphatically not something you want to risk getting wrong.

For comparison: My contractor was able to open a 15-foot-wide passageway through a central loadbearing wall, but we needed to install a heavy (4x12?) Parallam beam to absorb the load, strong columns at each end to transfer the load downward, and at the non-foundation end a steel C-beam was sistered to an existing joist to transfer load to foundation and main beam.

  • Thanks for the input, this is my first DIY... Just thought I would get some input on here before I had to pay someone to come help me out. I was guessing I'd have to have columns to help the support that beam but was hoping it would be easier than that. – ben Jun 23 '16 at 8:34

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