HIP

This routine will calculate detailed information about a hip or valley, given:- Main Pitch- End Pitch- Span- Ridge Thickness- Rafter HAP (Height Above Plate; i.e. Heel Height of the Common Rafters)

Items calculated by this routine are:- Hip length in FIS (Feet - Inches - Sixteenths)- Main Pitch-side Back Bevel for top of hip rip (in degrees)- End Pitch-side Back Bevel for top of hip rip (in degrees)- Hip Run in FIS- Hip HAP in FIS- Hip Pitch ( ___:17)- Hip Angle (in degrees)- Hip Exact (a second and different mathematical method is used to determine the Hip length as a

check. Not sure why I did this, but I must have had a reason.)

As with all of these routines, the user is “prompted” to enter the required numbers so that the calculation can be performed.

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Here is what the actual routine looks like when keyed into the calculator.

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The keystrokes to enter/store, in an HP scientific calculator, in RPN mode are below:

<< “Main Pitch” “” INPUT OBJ 12 / ‘P’ STO “End Pitch” “” INPUT OBJ 12 / ‘Q’ STO“SPAN FIS” “” INPUT OBJ INSH ‘S’ STO “Ridge Thkn” “” INPUT OBJ 2 / ‘C’ STO“Rafter HAP INCH” “” INPUT OBJ ‘A’ STO

R P * ‘H’ STO H Q / ‘E’ STO R 2 ^ E 2 ^ + ‘B’ STO B H 2 ^ + √ FEET" ‘HIP’ TAGP ATAN SIN Q P / ATAN COS * ASIN " ‘MHIPRIP’ TAGQ ATAN SIN P Q / ATAN COS * ASIN " ‘EHIPRIP’ TAGR Q P / ATAN SIN / ‘I’ STO I FEET" ‘HIPRUN’ TAGA H .75 * R 2 ^ H 2 ^ + √ / - FEET" ‘HIPHAP’ TAGH B √ / 288 √ * " ‘PITCH17’ TAGH B √ / ATAN" ‘HIPANG’ TAGR P * ‘F’ STO F SQ I SQ + √ FEET " ‘HIPX’ TAG

CLEER >>

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A more complex hip-roof calculation is shown below.

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