Roof pitch calculator

The below data table represents various roof pitches incrementing in degrees with associated figures for rise, rafter and hip\valleys. The data can be used to work out rafter length, hip\valley length and you can also see the roof rise for different pitched roofs

roofpitch

Finding out the rafter length

Enter the run (half span) of the roof: m

Read across table and enter rafter data: m

The rafter length is m

Finding out the hip\valley length

Enter the run (half span) of the roof: m

Read across table and enter hip\valley data: m

The hip\valley length is m

 

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