0

# On a deck what would be the maximum spacing of 2'X12' floor joists on a 20ft span?

Wiki User

2011-10-20 16:58:17

Best Answer

Even using a 2x12 the spacing for 20 feet will be less than 12 inches on center. I would recommend splitting the distance with a double beam perpendicular to the joist run. This will allow you to go up to 24 inches on center. Your span will only be ten feet aproximately this way. I would double the beam. (2-2x12 joined together) Good luck.

when building your beam make sure the laps on the beam are at least 6 foot apart and put a good wood glue on the 2x12s plus for added strength put 1/2 inch O.S.B. in between the 2x12 and I would also lag or bolt them together, at about 16 to 24 inches O.S.B. = Oscilating Strand Board.

Wiki User

2011-10-20 16:58:17
This answer is:
Study guides

1 card

➡️
See all cards
No Reviews

## Add your answer:

Earn +20 pts
Q: On a deck what would be the maximum spacing of 2'X12' floor joists on a 20ft span?
Write your answer...
Submit
Still have questions?
People also asked