Depth Of Floor Joists Uk

Dead load weight of structure and fixed loads 10 lbs ft 2.

Depth of floor joists uk.

Floor joists ceiling joists flat roof joists rafters purlin span tables for domestic floor joists to bs 5268 7 1 note. Therefore joist depth is 8 inches. The use of engineered floor systems is growing in the uk replacing traditional solid timber floor joists or concrete flooring. Standard floor joists are usually 2 by 10 or 2 by 12 dimensional boards installed on edge.

A 2 by 10 joist is really only 9 1 4 inches wide and a 2 by 12 is only 11 1 4 inches wide so depending upon. 2 grade of douglas fir are indicated below. 1 psf lb f ft 2 47 88 n m 2. Eg joists spans 14 ft wall to wall dived by 2 1 8.

Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. The actual width of those boards however isn t identical to what their name implies. 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. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction.

Joists are to have minimum end bearing of 40mm. The floor joists comprise the bulk of the floor thickness. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction. 1 ft 0 3048 m.

Live load is weight of furniture wind snow and more. With extensive timber engineering and roof truss experience scotts of thrapston has partnered with wolf systems to offer the easi joist metal web floor system. Note this only works in imperial and is for domestic loadings only. True floor joist span calculations can only be made by a structural engineer or contractor.

Maximum floor joist span for no. As a general rule of thumb the overall length of the joist span divided by 2 1 equals the depth of the joists.