Roof Joist Span Tables Building Regs 2019

Building control guidance note subject ceilings and flat roofs timber sizes and construction details 09 issued 01 04 13 rev page 1 of 2 the following tables give details of the allowable spans and spacing for some of the more common timber sizes used in ceiling and flat roof construction.

Roof joist span tables building regs 2019.

Surveyors span tables for designing roof rafters. Fire safe construction 3 floor performance and tj pro rating 4 5 section 1. For pitched roofs flat roofs and ceiling joists. Span calculator for wood joists and rafters also available for the android os.

Notches are not to exceed 0 125 of the depth of the joist and are to be located between 0 07 and 0 25 of the span from the support. These span tables apply only to flat roof and roof with a slope of up to 10 degrees. Timber floor joists shall be adequate for the spans and loads and be correctly installed. 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.

Timber to be covered these span tables do not apply to timber which is fully exposed to the elements. Floor joist span tables for surveyors floor construction. Spans for ceiling joists shall be in accordance with tables r802 4 1 and r802 4 2. Surveyors and structural engineers utilise data from tables below to help calculate the correct size strength and centres of roof timbers for the required spans and loadings.

Solid timber joist sizes are provided in the bs 8103 3 span tables. Trus joist tji joist specifier s guide tj 4000 july 2019. For other grades and species and for other loading conditions refer to the awc stjr. Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors.

Also available for the android os.