Sheetmetal Layout & Fabrication

I.     Course Prefix/Number: AHR 103

       Course Name: Sheetmetal Layout & Fabrication

       Credits: 4 (3 lecture; 3 lab)

II.    Prerequisite


III.   Course (Catalog) Description

Course covers methods of fabrication.  Content includes laying out and fabricating sheet metal ducts and fittings used in heating and air conditioning installations. Fee $40

IV.   Learning Objectives

The course covers the methods of measurements, layouts, tolerances and allowances for joints etc., and fabricating sheet metal ducts and fittings which are generally used in heating and air-conditioning in-stallations.  Students learn using shell metal equipment for cutting, bending, rolling and making special joints in lab.  Then they construct sixteen commonly used fittings to complete ductwork installation.

1.    Acquiring knowledge and use of various tools and equipment.
2.    Learning field measuring techniques.
3.    Developing skills in layout and fabrication of sheet metal ducts and fittings.  (List Fittings) Stu-dents will work in teams to construct following fittings:

V.    Academic Integrity and Student Conduct

Students and employees at Oakton Community College are required to demonstrate academic integrity and follow Oakton's Code of Academic Conduct. This code prohibits:

• cheating,
• plagiarism (turning in work not written by you, or lacking proper citation),
• falsification and fabrication (lying or distorting the truth),
• helping others to cheat,
• unauthorized changes on official documents,
• pretending to be someone else or having someone else pretend to be you,
• making or accepting bribes, special favors, or threats, and
• any other behavior that violates academic integrity.

There are serious consequences to violations of the academic integrity policy. Oakton's policies and procedures provide students a fair hearing if a complaint is made against you. If you are found to have violated the policy, the minimum penalty is failure on the assignment and, a disciplinary record will be established and kept on file in the office of the Vice President for Student Affairs for a period of 3 years.

Please review the Code of Academic Conduct and the Code of Student Conduct, both located online at

VI.   Sequence of Topics

    Date    Class    Class Description

    1    Entry Test-Seam allowances, notching techniques, equipment orientation and Square Duct layout and connecting methods.

    2    90 degree radius throat, radius heel elbow

    3    90 degree radius throat, radius heel change elbow

    4    2 piece transition with one sloped side

    5    QUIZ.  90 degree square throat, square heel elbow

    6    4 piece transition with two sloped side heel elbow

    7    90 degree square throat, square heel change elbow

    8    4-Piece transition with three sloped sides

    9    MIDTERM:  y-branch

    10    4-Piece transition with four sloped sides

    11    Radius offset

    12    Radius change offset

    13    QUIZ:  Furnace plenum cap and Chinamen's

    14    Radius double offset

    15    Goldberg fitting

    16    FINAL EXAM

VII.  Methods of Instruction

Lectures, shop instruction, quizzes, handouts and practical demonstrations.
Course may be taught as face-to-face, hybrid or online course.

VIII. Course Practices Required

A.    A total of three (3) absences will be allowed. More than three (3) will result in a failing grade.
B.    All quizzes and exams must be completed.
C.    Each student must participate in shop practices.
D.    Notify the instructor when leaving the class for the evening.

IX.   Instructional Materials

Note: Current textbook information for each course and section is available on Oakton's Schedule of Classes.

A.    Actual examples of fitting to be fabricated
B.    Detailed handouts of class topics

X.    Methods of Evaluating Student Progress

A.    Shop participation
B.    Quizzes
C.    Mid-Term & Final Exams
D.    Class Participation

XI.   Other Course Information

If you have a documented learning, psychological, or physical disability you may be entitled to reasonable academic accommodations or services. To request accommodations or services, contact the Access and Disability Resource Center at the Des Plaines or Skokie campus. All students are expected to fulfill essential course requirements. The College will not waive any essential skill or requirement of a course or degree program.

Oakton Community College is committed to maintaining a campus environment emphasizing the dignity and worth of all members of the community, and complies with all federal and state Title IX requirements.

Resources and support for
  • pregnancy-related and parenting accommodations; and
  • victims of sexual misconduct
can be found at

Resources and support for LGBTQ+ students can be found at