Flat Roof Roof Joist Span Calculator Uk

1 enter joist details 1 1 span and joist spacing.

Flat roof roof joist span calculator uk.

Click on a span to generate a full calculation you can adjust the exact span. Flat roof joist calculator. For pitched roofs flat roofs and ceiling joists. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Surveyors span tables for designing roof rafters. This is the distance between joist centres. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. This demo version is fixed at 1m clear span.

These span tables are the equivalent of other industry standard span tables and are calculated to the same standards. Usually 400 450 or 600mm but. The full version allows any size. Span calculator for wood joists and rafters also available for the android os.

These spans were calculated using our flat roof joist calculation engine. Joists under each partition. Span tables for flat roof joists to bs 5268 7 2 imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3. Suitable for uk building regulation approval.

Size of joists mm clear span c16 joist m clear span c24 joist m 47 x 95 47 x 120 47 x 145 47 x 170 47 x 195 47 x 220 1 77 2 40 2 89 3 38 3 87 4 36 2 04 2 75 3 47 4 20 4 93 5 66 floor joists flat roof joists assumptions at 400mm centers supporting permanent load excluding self weight of joists up to 50kg m2. Also available for the android os.