In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches.
Floor joist load calculator uk.
The highest is a fully loaded floor 70 pounds per square foot.
This a rough guideline.
Most lay outs are on 16 so the field is pre selected.
This is how far apart they will be.
Span calculator for wood joists and rafters also available for the android os.
The floor joist span tables are based on the loadings given in the amended version of bs 6399 1 which is an imposed load of either a uniformly distributed load of 1 5 kn m or a concentrated load of 1 4 kn.
Live load psf dead load psf span calculator for wood joists and rafters available for the iphone.
Calculations to bs 5268 2 2002.
Select the on center spacing for the joists.
Joists are to have minimum end bearing of 40mm.
Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor.
There are six choices.
Kn sq m the weight we place upon a floor by way of bathroom suites beds wardrobes etc is known as the imposed load.
The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example.
Enter a specific joist size 2 dead load.
Domestic floor joist calculator.
This dead load is generally taken by architects and planners to be no more than 0 50 kilo newtons per square metre.
Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span.
But larger is not always better when builders are constructing a home or adding a room addition.
In this case your joists are adequate to support a 30 psf live load and 10 psf dead load.
Suitable for uk building regulation approval.
Automatically calculate sizes suitable for supporting the loads below or.
However when running spf 2 6 floor joists into the floor joist calculator referenced above you get a maximum span of 9 feet 8 inches with a minimum bearing length of 3 inches at each end on 12 centers.
The lowest is a plain ceiling joist with no storage 10 pounds per square foot.
Imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3.
The span table for a 30 psf live load 10psf dead load floor indicates a required fb value of 1 315 and a minimum e value of 1 800 000.
The joists must be able to support this dead load without sagging.
