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Old 03-08-2010, 09:27 AM   #1
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Construction span distance


How long span can you have on floor beams on single 2'' x 6'', Double 2'' x 6'', Single 2''x 10'', Double 2'' x 10'', Single 2'' x 12'', and Double 2'' x 12''. I think I have to many posts under my house , look like a jungle of posts. Anybody have a clue??

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Old 03-08-2010, 10:54 AM   #2
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Construction span distance


Typically posts will be every 8 ft unless engineered to be more widely spaced. You shouldn't take them out without talking with a structural engineer or experienced builder who's willing to pull a permit.

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Old 03-08-2010, 12:30 PM   #3
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Construction span distance


a span table will get you headed in the right direction, but like walkman said don't do anything without consulting an engineer or builder.
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Old 03-08-2010, 01:30 PM   #4
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Construction span distance


Better to have more post then less, what if your son's football team decide to come over and have a dance party in your living room? any reason why you would want to pull out perfectly good posts?
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Old 03-08-2010, 03:08 PM   #5
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Construction span distance


The span will depend a great deal upon the load above
An engineer or possibly a good lumber yard could run the numbers

I think you maybe confusing the BEAM that supports the floor joists with the span of a floor joist
BEAM span is much different & takes more to calculate

Depending upon species, grade of wood & distance between joists:
2x6 will span less then 10' without an additional load
2x10 will span ~15' without an additional load
2x12 will span ~17' without an additional load

Again - this is the floor joist span
NOT The span for the beam that the floor joists sit on
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