This spacing provides enough support for common usage such as the placement of furniture and foot traffic.
Standard floor joist spacing uk.
While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length.
Floor joist span tables for surveyors floor construction surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors.
Builders can adjust their choice of lumber size and spacing depending on circumstances.
Normally floor joists are spaced 16 inches apart on center.
For upper floors with a 22mm thick chipboard decking and 12 5mm plasterboard ceiling a dead load of between 0 25kn m 2 and 0 5kn m 2 may be assumed.
You should check with your local building department for construction requirements in your area.
If a floor needs to support more than common items you may choose to reinforce the floor by spacing joists closer together.
The code itself is determined by the engineering requirements of a particular building.
In many home constructions joists sit 16 inches apart beneath the floor.
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.
The section sizes of the floor joists given in tables 1 and 2 should be regularised or be als or cls to enable floors and ceilings to be level.
See the image below for an example of joists spaced 16 on center 16 o c.
Two options that arise could be your wider 24 and your narrower 12 options for spacing.
Joist span and spacing is set by your local building code.
Joists are to have minimum end bearing of 40mm.
This means from the center of one upright joist to the center of the next.
The floor joist spacing is the distance between the centers of any two installed joists.
In many circumstances 16 inches would be your standard spacing for shed floor joist but this is just a rough guideline.