Deck framing
#1
06-17-06, 01:03 PM
Deck framing
What is the recommended lumber size for framing a 12' x 20' deck? The joists will span the 12' dimension. Will use five posts on each side and five posts through the center for support.
I was thinking of using 2x8's. Would this be sufficient?
I was thinking of using 2x8's. Would this be sufficient?
#2
06-17-06, 01:35 PM
2x8's can generally span upwards to 12'10" plus depending on the grade. I would use no less than grade 2 lumber. Also, you will want the span to be no more than 16"oc
#3
06-17-06, 10:32 PM
At 12 X 20, I would probably run the beams and the deck boards in the 20 foot direction and the joists in the 12' direction. I would use 3 beams (or girders), and the joists would span 5' to 6' depending on whether it was cantilevered or not. 2X6's at 16" O. C. will span 6' are are MUCH easier to find (plus they cost less) than 2X8's.
What size of beams you use will determine how far you will space the footings. I almost always use 4X6's and space the footing 5' to 6' apart.
How far above grade is the deck at it's highest point? Around here, if it's more than 30", it requires a bldg. permit and you build it the way the approved plans call for.
What size of beams you use will determine how far you will space the footings. I almost always use 4X6's and space the footing 5' to 6' apart.
How far above grade is the deck at it's highest point? Around here, if it's more than 30", it requires a bldg. permit and you build it the way the approved plans call for.
