Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Max span for 2x4 floor joist.
Dead load is the weight of the structure and any fixed items.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Spans in this table were derived from the irc table r502 3 1 2 design criteria.
Spf 2 6 rafters can span 8.
For heavy loads at 24 o c 2 6 syp can span up to 9.
All floor joist tables start with 2x6 lumber.
2 grade of douglas fir are indicated below.
Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in.
Our joist span charts are for wood joists with a maximum dead load of 10 pounds per square foot and a live load of 40 pounds per square foot.
Maximum floor joist span for no.
Hem fir 2 joists with a live dead load of 40 10 psf.
An spf roof at the same spacing and lumber size will span 11.
Span calculator for wood joists and rafters also available for the android os.
Dead load weight of structure and fixed loads 10 lbs ft 2.
Most spans are typically 10 to 12 feet so we typically use 2x8 or 2x10.
While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator.
Live load represents the weight of furniture snow etc.
These numbers are for roofs supporting light loads of 20 pounds for square foot.
There are online span calculators available that tell you the maximum span for.
View joist rafter tables.
The depth or height of your floor joists depends on how far they can span without sagging.
1 ft 0 3048 m.
Live load is weight of furniture wind snow and more.
If you use awc calculator 2x4 can span 6 2 with l360 deflection for decks 40lb ll.
This chart is for basic reference only.
1 psf lb f ft 2 47 88 n m 2.
Shorten the span maybe to 5 and put them 12 oc or like mac said 4 16 oc.
The illustrations one for cantilever joists and one for flush rim beam hung joists point out where joist span measurements are taken from the saddle of the ledger mounted joist hanger to the center of a dropped beam or saddle of the.
I personally think it will be a bouncy floor.
