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Building Homes or Extensions/2 X 12 spacing for 300/bs per sqft loading

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Expert: - 6/21/2011


Question
I need to put a 4'x 4'x 8' (128 cubic feet)water tank on a wood framed floor. I'm using 2" x 12" rough cut spruce for floor joists. These are spanning 12' with 3/4 tongue and groove plywood sheathing. The floor framing sits on 6" x 12" beams at either end with a double rim joist on both ends. I was thinking making the spacing at 1' O.C. under the water tank area. Would that be sufficient?

Answer
Hi Robert, spruce isn't my favorite choice for structural joists (Douglas fir or southern yellow pine top the list followed by hem-fir) but you are only talking 300psf..long story short definitely go with the 12" spacing..I hope this information helps, please feel free to write again regarding this or other matters, sincerely bruce johnson..bejohnsonconsulting.com

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Bruce E. Johnson

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I can answer any construction related question in regards to carpentry, concrete, drywall, masonry, structural elements of any type of building, residential or commercial. Interior or exterior.

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Custom Commercial and residential buildings. Churches, theaters, schools and auditoriums. Most recently I am working with the Catholic Church on several design build committees. I have a website related to scheduling and project supervision. Although my expertise is more related to multimillion dollar commercial, educational and theatrical projects my generous credentials in residential and remodelling construction make me a viable source of information regarding all forms of building questions.

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