Flat Roof Joist Calculator

Calculations to BS5268-2:2002

1 Enter Joist Details

1.1 Span and joist spacing

This demo version is fixed at 1m clear span. The full version allows any size

Joist spacing
This is the distance between joist centres. Usually 400, 450 or 600mm, but any value can be used up to 610mm max

1.2 Timber strength class and joist size

2 Loadings
Dead load
Live load

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