While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12.
How to determine area for roof in revit.
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That gives you 5 590 square feet which is the actual area of the surface of the roof.
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To create a hip roof 4 side slope define slope for all boundaries.
Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118.
Click duplicate this type to create a new type with different parameters for future use.
As such while it can be cumbersome measuring the area and pitch of each part of the roof and multiplying by the corresponding correction factor will result in the most accurate estimate of necessary.
Click quantification tab areabook extension panel calculate areas.
If slope is active for boundary lines a triangle symbol will appear next to them.
In the option bar make sure defines slope is activated for boundary lines.
This applies to lengths as well as areas.
Calculate areas in a project.
In the calculate areas dialog specify the calculation type.
The default for calculation is standard.
With 3d mep autocad or revit increasing in popularity it should be not difficult to determine the correct projected area for sizing the rainwater system the roof drains leaders gutters downspouts and horizontal piping.