APR 266H Sheetmetal Apprenticeship-Calculator Layout

Lecture Hours: 4
Lab Hours: 2
Credits: 5

Focuses on architectural and mechanical sheet metal layout and fabrication principles and practices using a calculator.

Prerequisite: APR 266G with a grade of C or better; or consent of instructor.
Student Learning Outcomes:

Perform mathematical functions on the hand-held calculator to layout sheet metal fittings.
Apply the functions to square, rectangular, and round fittings.
Calculate parallel, radial and triangulation development.
Use calculator as a shortcut method to fund true length in parallel, radial and triangulation development.

Content Outline

Introduction to the Hand-Held Calculator
- Direct and Indirect Measurements
- Decimals
- Decimal and Fraction Conversion
General Mathematics and Terminology
- Terminology
- The Circle and Its Parts
- The Ellipse
- Equations and Formulas
- Transposing Equations
- Proportions (Means and Extremes)
- Changing Formulas
- Parentheses
Triangles
- According to Sides
- According to Angles
- Area
- Law of the Right Triangle
- The Radian
Trigonometry
- Expression of Formulas
- Square Root
- Labeling the Right Triangle
- The Unit Circle (Sine and Tangent Relationships)
Square and Rectangular HVAC Fittings
- Physical Sine and Tangent Calculated to Throat and Heel
- Exercises for Gooseneck Angles
- Calculations for O.G. Offset
- Solving Heel Angles of Radius Tap-in
- Calculating Heel Angle of Branch Fittings with Sine line
Round HVAC Fittings
- Calculator Development of a Round Pipe Miter
- Elliptical Hole Layout for the Pipe Miter
- Round Angles
- Round Elbows
- Three Piece Round Offset
- Multi-piece Round O.G. Offset
- Nine Degree Round Tee with Equal Diameters
The Calculator Used As A Shortcut Method to Find True Lengths
- Parallel Line Development
- Radial Line Development
- Triangulation
Introduction to Computer Programming