RoofRiseIn12 ( Angle ; Precision )

Returns rise for a run of 12

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L. Allen Poole - Show more from this author
Creative Database Solutions NW
http://cdsnw.com

Sample input:

RoofRiseIn12 ( 45 )
RoofRiseIn12 ( 37 )
RoofRiseIn12 ( 22 )

Sample output:

12
9 1/16
4 7/8

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

//Express an angle measurement between 0 and 90 as a roofer's pitch ratio of rise over 12" run
//L. Allen Poole   <allen@cdsnw.com>
//Uses InchFraction function by L. Allen Poole to convert decimal remainder into carpenter's fraction

Let ( [
Decimal = Truncate ( Tan ( Radians ( Angle ) ) * 12 ; Precision ) ;
Integer = Int ( Decimal ) ;
Remainder = Decimal - Integer ;
Fraction = InchFraction ( Remainder ) ] ;

Case(Fraction = " +1" ; Integer + 1 ; Integer & " " & Fraction ) )

Convert's an engineer's slope measured in degrees into a roofer's ratio of inches rise per 12" run.

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Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

RoofRiseIn12 ( Angle ; Precision )

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