Maricopa Community Colleges  IMC123   19976-20086 
Official Course Description: MCCCD Approval: 07/22/08
IMC123 19976-20086 LEC 1 Credit(s) 1 Period(s)
Radial Line Fabrication
Principles and design of duct systems, construction layout, standards, and applications. Fabrication of select sheet metal fittings.
Prerequisites: None.
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MCCCD Official Course Competencies:
 
IMC123   19976-20086 Radial Line Fabrication
1. Explain the effect of operating pressure on the design of a duct system. (I)
2. Determine the sealing requirements for a selected dunctrun by using reference charts and tables. (II)
3. Determine the minimum gage requirements for a selected dunctrun by using reference charts and tables. (III)
4. Determine the minimum connector and reinforcing requirements for selected dunctruns by using reference charts and tables. (IV)
5. Describe the purpose and correct application of a tie and rod and determine the tie using reference charts. (V)
6. Identify the different types of acceptable longitudinal seams, their application and limitations. (VI)
7. Describe the principles of radial line development. (VII)
8. Apply the principles of radial line development to determine the layouts for sheet metal fittings. (VIII)
9. Perform the layout and fabrication of selected sheet metal fittings and specific related tasks. (IX)
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MCCCD Official Course Outline:
 
IMC123   19976-20086 Radial Line Fabrication
    I. Duct system design
        A. Operating pressure
        B. Water gauge
      II. Sealing requirements
          A. Leakage
          B. Seal class
          C. Reference charts and tables
        III. Gage requirements
            A. Gage and connector
            B. Duct reference charts and tables
            C. Gage
            D. Gage - intermediate reinforcing
          IV. Connector and reinforcing requirements
              A. Intermediate reinforcing
              B. Connector and intermediate reinforcing
              C. Connector joint
            V. Tie and rod
                A. Purpose
                B. Connector with tie rod
                C. Intermediate reinforcing with tie
                D. Reference charts and tables
                E. Mandatory or optional applications IMC123Effective Term:
              VI. Longitudinal seams
                  A. Types
                  B. Applications
                  C. Limitations
                VII. Radial line development
                    A. Principles
                    B. Uses
                  VIII. Radial line development applications
                      A. Job sheets
                      B. Layout tools
                      C. Fabrication equipment
                      D. Layouts for sheet metal fittings
                    IX. Layout and Fabrication
                        A. Ducts
                          1. Symmetrical tapered duct
                          2. Round duct intersecting a taper
                          3. Tapered offset duct
                          4. Off-center tapered duct
                          5. Square-to-square tapered duct
                        B. Special applications
                          1. Rectangular weather cap
                          2. Roof slope stack flange
                          3. Cone-shaped exhaust weather cap
                          4. Roof peak gravity ventilator
                          5. Two-way Y-branch
                          6. Shoe tee intersecting a taper - on center
                          7. Tapered elbows - 90 degrees
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