help with expression for roof pitch

[RandyC]

With the new expressions - we should be able to create a label that gives - roof slope -- ie: 4/12 , 5/12 etc.
It should work with-- roof slope = tan(roof_angle)*12
I am unsure of what syntax to use,or if it is possible -- any ideas ?
Thanks Randy

[poco2013 · Accepted solution]

If you want The pitch format of 6/12 etc., the expression would be:

CONCAT ( STR ( TAN ( {Property:Roof/Pitch} ) * 12, 0 ), "/12 - Pitch" )

Both the expression and the element must have the same classification.

[RandyC]

Thank you , worked perfect -- I will need to get my head around classification.