Floor Joist Spacing Uk

When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started.

Floor joist spacing uk.

All the figures are based on normal domestic floor loadings where the floor construction is typically 18 25mm floor boards sheets with up to 12 5mm thick plasterboard and skim underneath. This is the distance between joist centres. 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. Spacing between joists when spacing your joist structure the maximum gap between joists from centre to centre should be no more than 400mm.

Since the example house we are designing for is 12 feet wide we need to find in the floor joist span table a joist size and centering that can span 12 or wider. Suitable for uk building regulation approval. There are three basic measurements used for floor joist spacing. Click on a span to generate a full calculation you can adjust the exact span.

The smaller joists will need supporting at shorter intervals than the 6x2 joists. 1 1 span and joist spacing. Find the column for your dead load and spacing and the row for your timber size to find the permissible clear span in metres. The full version allows any size.

The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction. Domestic floor joist calculator. There are also several floor joist sizes and types used. The floor joist spacing is the distance between the centers of any two installed joists.

28mm thick deckboards can be laid on joists with 600mm spacing though for higher level decks this should be reduced to 500mm centres. Usually 400 450 or 600mm but any value can be used up to 610mm max. The right spacing depends on the code requirements as well as the type of structure it is and the weight it. Spacing recommended is for domestic or light commercial use if in any doubt seek further professional help.

The spacing between standard joists will depend upon the thickness of the actual deck boards. Joist span and spacing is set by your local building code. See the image below for an example of joists spaced 16 on center 16 o c. Calculate the maximum load in kilograms that one of your floor joists can support.

This span table is to the format and methodology given in bs 5268 7 1. This demo version is fixed at 1m clear span. These spans were calculated using our floor joist calculation engine.