If you have engineered truss or i beam type joists please do not use this calculator.
Flooring deflection 2x6.
Live load is weight of furniture wind snow and more.
1 psf lb f ft 2 47 88 n m 2.
Span calculator for wood joists and rafters also available for the android os.
See the table below.
Spacing in exterior exposure.
Dead load weight of structure and fixed loads 10 lbs ft 2.
A typical wood frame floor covered with carpet or vinyl flooring has a dead load of about 8 pounds per square foot.
Ft plus any long term deflection due to the weight of the floor.
Maximum floor joist span for no.
1 ft 0 3048 m.
For example the maximum deflection for a joist span of 15 is 15 12 360 1 2.
Divide the total span of the floor joists in inches by 360 to determine the maximum amount the floor can give in the middle under a live load of 40 lb sq.
Enter your floor joist information and then hit calculate deflection to find out your floor rating.
Ceiling joists are sized like floor joists except that deflection limits vary depending on whether the joists will be used for attic storage or will have a plaster or drywall finish.
Live load psf dead load psf span calculator for wood joists and rafters available for the iphone.
If there s wall board covered ceiling suspended from the underside of that floor the dead load increases to about 10 pounds per square foot.
For example the allowable deflection of a 12ft span floor joist with plaster l 360 is 0 4 12ft divided by 360.
Again deflection varies as the inverse of stiffness so the deflection of a 2x6 and 2 8 sistered together is 1 3 5357 2828 relative to the deflection of the 2x6 alone for a 71 72 reduction.
This calculator is designed to work with dimensional lumber only.
It was a complex expensive job.
Boss hog has instructed us that the feel of a floor depends on its resonant frequency as well as the the actual deflection.
If there is any deflection in the subfloor when walked on it would be advisable to add an additional layer of 3 8 or 1 2 thick plywood underlayment glued and screwed down over osb subfloor to add stability or install 2x6 blocking between the floor joists for added stability.
If that same joist had gypsum ceiling l 240 the allowable deflection is 0 6.
So consider a simple gable roof on a 24 foot wide ranch framed with 2x6 exterior walls and a 1 1 2 ridge.
Check your code and.
The dead load on a floor is determined by the materials used in the floor s construction.
By doubling up the joists we cut their deflection the distance they would bend under weight in half.
The span would be 11 5 3 4.
