Floor Joist Size Calculator Uk

These tables can help calculate whether floor joists are strong enough to support themselves and the load they carry without the help of any walls underneath.

Floor joist size calculator uk.

Looking at this table you will see there is a choice in the size of floor joist 2 x 6 2 x 8 2 x 10 or 2 x 12 and there is a choice in the joist spacing 12 16 or 14. These spans were calculated using our floor joist calculation engine. Oxford 01865 326500 swindon 01793 484455 or yarnton 01865 842574. Span calculator for wood joists and rafters also available for the android os.

Click on a span to generate a full calculation you can adjust the exact span. Usually 400 450 or 600mm but any value can be used up to 610mm max usually 400 450 or 600mm but any value can be used up to 610mm max 1 2 timber strength class and joist size. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Supporting imposed load.

Decking calculator please use our calculator below to help you estimate how many decking boards and joists you will need to create your deck. This is the distance between joist centres. The highest is a fully loaded floor 70 pounds per. There are six choices.

The floor joist spacing is the distance between the centers of any two installed joists. Find the column for your dead load and spacing and the row for your timber size to find the permissible clear span in metres. We have engineered this calculator to provide spans which will produce a solid built house with no bounce in the floors or any swags in the ceiling. See the image below for an example of joists spaced 16 on center 16 o c.

The lowest is a plain ceiling joist with no storage 10 pounds per square foot. Also available for the android os. Size of joists mm clear span c16 joist m clear span c24 joist m 47 x 95 47 x 120 47 x 145 47 x 170 47 x 195 47 x 220 1 77 2 40 2 89 3 38 3 87 4 36 2 04 2 75 3 47 4 20 4 93 5 66 floor joists flat roof joists assumptions at 400mm centers supporting permanent load excluding self weight of joists up to 50kg m2. Please get in touch with your local branch if you have any questions.