Floor joist span tables for surveyors floor construction.
Timber floor joist span tables 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.
Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span.
These spans were calculated using our floor joist calculation engine.
Solid timber joist sizes are provided in the bs 8103 3 span tables.
This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance.
Apa performance rated i joists pris are manufactured in accordance with pri 400 performance standard for apa ews i joists form x720 this performance standard provides an easy to use table of allowable spans for applications in residential floor construction allowing designers and builders to select and use i joists from various member manufacturers using just one set of span.
Span tables for domestic floor joists to bs 5268 7 1 note.
This table uses commonly available uk regularised timber depths.
Floor joist span tables for various sizes and species of wood.
Span tables for solid timber joists.
Span tables for joists and rafters 3 american wood council table 9 1 required compression perpendicular to grain design values f c in pounds per square inch for simple span joists and rafters with uniform load.
Where the tables do not apply or where there are concentrated loads floor joists should be designed by an engineer in accordance with technical requirement r5.
Read the notes at the bottom of the table for assumptions references and related standards.
Span calculator for wood joists and rafters also available for the android os.
Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1.
These span tables are the equivalent of other industry standard span tables and are calculated to the same standards.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Span ft 1 5 2 0 2 5 3 0 3 5 2 30 22 18 15 13 4 59 44 36 30 25 6 89 67 53 44 38 8 119 89 71 59 51 10 148 111.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
The weight of the timber floor itself consists of the timber joists the plasterboard ceiling underneath it except for suspended timber ground floors the floorboards and the nails or screws used to fix both of the aforementioned coverings.
