TASM-120: Sheet Metal Layout: Radial and Triangulation

Business, Entrepreneurship, and Professional Development
Trade & Apprentice Education
Skilled Trade & Apprenticeship
Academic Level
Course Subject
TAE - Sheet Metal
Course Number
Course Title
Sheet Metal Layout: Radial and Triangulation
Credit Hours
Instructor Contact Hours Per Semester
32.00 (for 15-week classes)
Student Contact Hours Per Semester
32.00 (for 15-week classes)
Grading Method
TASM-100 or TAE Apprentice Coordinator/Instructor Permission
Catalog Course Description

Covers the development of geometrical elements of structures, their intersections by the radial line, triangulation methods of sheet metal layout, the drawing of development layouts, and the forming of cardboard or sheet metal models.

Goals, Topics, and Objectives

Core Course Topics
  1. Layout problem for pipe and flange pipe.
  2. Stretchouts for sections of the joint.
  3. Stretchouts for sections of elbows.
  4. Stretchouts with 3/8" lap seam.
  5. Stretchouts with ¼” lap seam.
  6. Stretchout of cap including location of support legs.
  7. Layout plan and elevation.
  8. Drop cheek elbow and reverse elbow.
  9. Ogee offset.
Core Course Learning Objectives (Separated)
  • Demonstrate radial line development through the use of a variety of problems utilizing geometric elements of structures.
  • Demonstrate the process to make a simple lap seam to fabricate cardboard or sheet metal models.
  • Apply shop problems to layout flanges and collars.*
  • Explain the method of development through the use of a  variety of problems including square to square, square to rectangle, round to round, square to round, square to oval, round to oval, etc.*
  • Assessment and Requirements

    Assessment of Academic Achievement

    All students will be required to complete a comprehensive final examination that assesses the learning of all course objectives. This exam must be weighted in a manner so that this exam score is worth a minimum of 15 percent of the final course grade.  This exam is to be a common exam administered to all sections of TASM 120.


    Texts, handouts, and/or workbooks will be determined by the TAE Department.


    Approval Dates

    Effective Term
    Fall 2014
    ILT Approval Date
    AALC Approval Date
    Curriculum Committee Approval Date