On May 20, 2020, at 2:19 PM, Joe Jensen <joe.jensen@...> wrote:

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Hi all, the journey of building out the new shop continues.? I am now planning a closet to house the cyclone dust collector.? Being an engineer, I have to research everything.? I found a fantastic website with data on different wall construction and the STC (sound transmission coeff) for each.



I had been planning to do 2x6 plates and staggered 2x4 studs.? From the data at the site I was surprised at a couple of things.? First, steel studs are meaningfully better the wood studs.? Second if building two walls, having drywall only on the two exterior sides is better than having drywall sides of the studs facing inside the double wall.??

I have decided to do double steel stud walls with 2 1/2" steel studs.? I think I want 20 gauge and not the cheaper 25 gauge. any input on that?

I will install 5/8" drywall inside, a layer of green glue, and a second layer of 5/8" drywall over that and then 5/8" drywall outside. If not quiet enough I will install green glue and a second layer of 5/8" drywall outside.

I need a door to access the drum and a door to access the filters.? I am fairly certain I will do some sort of stress skin construction for the doors.

Any suggestions on how to get the dust inlet sealed to the sound proof wall?? I am doing a folded duct with 5X the cross sectional area of the exhaust port for flow the air conditioned air back into the room.