Enter your existing heel size or rafter size.
Flat roof roof joist span calculator uk.
This span table is to the format and methodology given in bs 5268 7 2.
Flat roof with asphalt finish with felt.
Flat roof joist calculator.
What is the standard pitch for a roof.
Maximum clear span of flat roof joists in metres for sc3 timber spacing between joists size of roof joist 400mm 450mm 600mm 47 x 97 1 84 1 81 1 74.
To use the truss form existing roof dimension calculator.
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.
This table uses commonly available uk regularised timber depths.
This is the distance between joist centres.
Surveyors span tables for designing roof rafters.
This demo version is fixed at 1m clear span.
Flat roof options help to free up internal space and are often cheaper that pitched roof options as they require fewer materials to cover the same roof span.
Span calculator for wood joists and rafters also available for the android os.
If you re thinking about replacing your roof with a new one you will need a roof truss calculator.
These spans were calculated using our flat roof joist calculation engine.
This tool is intended a guide only.
For pitched roofs flat roofs and ceiling joists.
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.
These span tables are the equivalent of other industry standard span tables and are calculated to the same standards.
There is no standard universal roof pitch roof pitch varies depending on culture climate style and available materials in the usa the range of standard pitches is anywhere between 4 12 and 9 12 in the uk the typical house has a pitch between 40 50 although 45 should be avoided.
This online truss calculator will determine the all in cost of your truss based on key inputs related to the pitch width and overhang of your roof.
The full version allows any size.
Also available for the android os.
Joists under each partition.
Should refer to trada document span tables for solid timber members in floors ceilings and roofs excluding trussed rafter roofs for dwellings or ask your lbc surveyor for advice.
1 enter joist details 1 1 span and joist spacing.
Flat roofs are exceedingly popular with those looking to create a cool modern home.
