40x60 shop - Interior Build Out - Joists

[WIKDRacing]

I am currently almost dried in on my shop construction and started looking at the interior build out I have planned. The shop is 40x60x16 and I was planning on building a space about 14x24x9 inside for bathroom, small kitchen area for fridge etc and seating area for wife, kids, friends etc.

I have been looking at using the space above for storage and a place to mount air compressor. I am not sure which span table is appropriate to look at as I am not 100% sure of what load I should be considering. I was thinking of using 40psf live/20psf dead; this would put me at 2x12 for the 14ft span with yellow pine. Seemed a bit excessive to me on the sizing but I'm not an expert.

Any tips would be appreciated.

 

[waitn4u]

This is a good site for info, helped me with my storage above the bathroom and laundry room. https://www.bc.com/manufacturing/bci-joists/

 

[850xpeps]

You will need a span table for a floor. Is that 2x12 on 16” centres? What you might think is over kill just think of a house. Mine has 2x10 on 16” centres fir wood on a 12’6” span. And the floor moves. I’m a carpenter and I can’t stand moving floors lol I like my ch!t sturdy.

 

[rpenterics]

this calculator might help, http://www.awc.org/codes-standards/calculators-software/spancalc

 

[cj7jeep81]

For my loft, I used 2x12 southern pine on 16" centers, and span just under 15.5'. I put 3/4 plywood down on the floor and 0 movement.

 

[The Tool Tyrant]

Here's another link to add to the above...http://www.awc.org/pdf/codes-standards/publications/span-tables/AWC-SpanTables2005-0606.pdf

I would strongly suggest placing your compressor as close to the bearing walls as possible to minimize sound transmission and vibration.

 

[rburke65]

Spend the extra money and put them on 16" centers and you'll be forever happy.

 

[WIKDRacing]

Sorry should have clarified, the span was 16" O.C. I will also be using 3/4" plywood for the flooring.

Thank you all for the help. Appears using the calculator I am good with 2x12s up to 50psf/20psf at the span I am looking at.

I had also planned to build a small platform for the compressor at the intersection of two of the load bearing walls, hoping that would also help with the vibration transfer.

 

[Ak Jim]

Are you planning on having some storage up there also?

 

[WIKDRacing]

Yes but not a lot just some. Should I revise my thinking?


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[Ak Jim]

Not sure. Just allow for the extra weight. If you're like me the amount of stuff you need to store will keep increasing.