Calculated Industries 4090 - Manual (Page 121)

120 — ITI S
HEET
M
ETAL
/HVAC P
RO
Degree of Pitch, 86
Dividing Dimensions, 29
Dividing Offset into Multiple Degreed Elbows for Manageable Sections, 51
D:M:S EXAMPLE, 45
ENTERING DIMENSIONS, 25
Entering Linear Dimensions, 25
Entering Square/Cubic Dimensions, 25
EXAMPLES — USING THE SHEET METAL/HVAC PRO, 33
Fan Law 1, 75
Fan Law 2, 76
Fan Law 3, 77
FAN LAW EXAMPLES, 75
FAN LAW FORMULAS (APPENDIX E), 106
FAN LAW KEYS, 14
FEET-INCH-FRACTION and METRIC KEYS, 8
Field Measuring for Ductwork Using the Law of Cosines Introduction, 55
Finding “Angle A” (ArcSin, ArcCos, ArcTan), 41
Finding Length (of Iron) Required, 35
Finding Sine, Cosine, Tangent, 41
GETTING STARTED, 21
HIP/VALLEY and JACK RAFTER KEYS, 17
How to Set Preferences, 110
Inline Duct, Double Offset (Computing Offset, Length, and Angle), 62
Inline Duct, Single Offset (Computing Offset, Length, and Angle), 60
Irregular Hip/Valley and Jack Rafters — Descending, with On-Center Spacing
Maintained, 92
Jack Rafters — Using Other Than 16 Inch On-Center Spacing, 91
KEY DEFINITIONS, 6
LAW OF COSINES EXAMPLES, 55
LAW OF COSINES/HERON’S THEOREM FORMULAS (APPENDIX D), 105
LAW OF COSINES/NON-90 DEGREE TRIANGLE KEYS, 12
Linear Conversions, 27
MEMORY and STORAGE FUNCTIONS, 7
MEMORY OPERATION, 31
Multiplying Dimensions, 29
Non-90 Degree Triangle Measurement Using Law of Cosines and Heron’s
Theorem, 56
Objects at Right Angles, 65
Offset, Basic Example, 48
OFFSET EXAMPLES, 48
OFFSET FORMULAS (APPENDIX C), 104
OFFSET KEYS, 13
OGEE Offset in Feet-Inches-Fractions, 49
OGEE Offset, in Millimeters, 50
ORDER OF OPERATIONS, 21
Percentage Calculations, 30
Percent Grade, 86
PERFORMING BASIC MATH WITH DIMENSIONS, 29
PREFERENCE SETTINGS (APPENDIX G), 107
PYTHAGOREAN THEOREM/RIGHT TRIANGLE KEYS, 10
RECALL
® KEY, 8
Regular Hip/Valley and Jack Rafters, 89
REPAIR AND RETURN, 116
Replacing the Battery(ies), 115