Apr 24, 2024  
Catalog 2023-2024 
Catalog 2023-2024

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:
  1. Perform mathematical functions on the hand-held calculator to layout sheet metal fittings. 
  2. Apply the functions to square, rectangular, and round fittings. 
  3. Calculate parallel, radial and triangulation development. 
  4. 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