Maricopa Community Colleges  ABC140   19956-20046 
Official Course Description: MCCCD Approval: 04/25/95
ABC140 19956-20046 L+L 3 Credit(s) 5 Period(s)
Radial Line Develop: Sheetmetal II
Principles of radial line development and application to specific projects. Interpretation of drawings, plan view, elevation view, pattern stretch-out and working drawings. Layout and fabrication of specific sheetmetal projects. Prerequisites: (Indentured status with the Arizona Builders Alliance and ABC115) or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABC140   19956-20046 Radial Line Develop: Sheetmetal II
1. Explain basic principles of parallel line development. (I)
2. Describe the principles of radial line development. (I)
3. Identify and interpret: elevation view, plan view, side view, pattern stretch-out and pictorial view of specific sheetmetal fittings. (I)
4. Use layout and fabrication tools for radial line development and fitting fabrication. (I)
5. Spot weld and or rivet seams and joints. (I)
6. Draw, layout and fabricate a Rectangular Weather Cap. (II)
7. Draw, layout and fabricate a Symmetrical Tapered Duct. (II)
8. Draw, layout and fabricate a Roof Slope Stack Flange. (II)
9. Draw, layout and fabricate a Cone-shaped Exhaust Weather Cap. (II)
10. Draw, layout and fabricate a Roof Peak Gravity Ventilator. (II)
11. Draw, layout and fabricate a Round Duct Intersecting a Taper. (II)
12. Draw, layout and fabricate a Tapered Offset Duct. (II)
13. Draw, layout and fabricate a Two-Way Y-Branch. (II)
14. Draw, layout and fabricate an Off-Center Tapered Duct. (II)
15. Draw, layout and fabricate a Square-To-Square Tapered Duct. (II)
16. Draw, layout and fabricate a Shoe Tee Intersecting a Taper-On Center. (II)
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MCCCD Official Course Outline:
 
ABC140   19956-20046 Radial Line Develop: Sheetmetal II
    I. Radial Line Development
        A. Parallel line development principles
        B. Principles of radial line development
          1. True length of elements
          2. Base circumference or perimeter
        C. Views
          1. Elevation
          2. Plan
          3. Side
          4. Pictorial
          5. Stretch-out
          6. Other
        D. Use of radial line development
        E. Tools and equipment
          1. Scratch awl
          2. Straight edge
          3. Prick punch
          4. Dividers
          5. Pliers
          6. Hand seamer
          7. Snips
          8. Beading, crimping, turning and burring machines
          9. Electric spot welder
          10. Other
        F. Joining joints and seams
          1. Welding
          2. Riveting
          3. Crimping
      II. Drawing, Layout and Fabrication
          A. Rectangular weather cap
            1. Tools and materials
            2. Procedure
          B. Symmetrical tapered duct
            1. Tools and materials
            2. Procedure
          C. Roof sloped stack flange
            1. Tools and materials
            2. Procedure
          D. Cone shaped exhaust weather cap
            1. Tools and materials
            2. Procedure
          E. Roof peaked gravity ventilator
            1. Tools and materials
            2. Procedure
          F. Round duct intersecting a taper
            1. Tools and materials
            2. Procedure
          G. Tapered offset duct
            1. Tools and materials
            2. Procedure
          H. Two-way Y-branch
            1. Tools and materials
            2. Procedure
          I. Off-center tapered duct
            1. Tools and materials
            2. Procedure
          J. Square-to-square tapered duct
            1. Tools and materials
            2. Procedure
          K. Shoe tee intersecting a taper-on center
            1. Tools and materials
            2. Procedure
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