Maricopa Community Colleges  IMC118   19962-20086 
Official Course Description: MCCCD Approval: 07/22/08
IMC118 19962-20086 L+L 3 Credit(s) 14 Period(s)
Parallel Line Development
Parallel line development, pattern layout, and fabrication of selected ductrun fittings.
Prerequisites: None.
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MCCCD Official Course Competencies:
 
IMC118   19962-20086 Parallel Line Development
1. Define specific terms related to the design and fabrication of sheet metal fittings and parallel line development. (I)
2. Describe the parallel line development procedure as it relates to the layout of sheet metal patterns. (II)
3. Describe the materials required for the design and fabrication of sheet metal fittings and ducts. (III)
4. Describe the correct tools needed to design and fabricate sheet metal fittings. (IV)
5. Demonstrate competency in parallel line development layout procedures. (V)
6. Using parallel line development, construct sheet metal fittings. (VI)
7. Cut and form specific patterns utilizing parallel line development. (VI, VII)
8. Design and construct specific ductrun fittings. (VII)
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MCCCD Official Course Outline:
 
IMC118   19962-20086 Parallel Line Development
    I. Terminology
        A. Duct
        B. Pipes
        C. Ductrun
        D. Fabrication
        E. Elevation
        F. Change angle
        G. Change cheek elbow
        H. Clinch tee
        I. Fitting
        J. Ogee offset
        K. "S" offset
        L. Standard 90A
        M. Tap-in
        N. Taper pattern
        O. True length
        P. Trunkline
        Q. Vanes
      II. Parallel Line Development Procedure
          A. Plan and elevation views
          B. Measuring lines
          C. Stretchout of pattern
          D. Location of measuring lines onto pattern
          E. Transfer of length onto pattern
          F. Connecting points
          G. Allowances for connections IMC118Effective Term:
        III. Materials
            A. Seams
            B. Tinner's rivets
            C. Sheet metal screws
            D. Solder
            E. 18 to 26 gage galvanized metal
            F. Nuts and bolts
            G. Welding materials
          IV. Tools
              A. Awls
              B. Framing square
              C. Combination square
              D. Prick punch
              E. Dividers
              F. Trammels
              G. Scribers
              H. Circumference rule
              I. Hand cutting tools
              J. Hand forming tools
              K. Turning machines
              L. Roll forming equipment
              M. Bar folder
              N. Brake
              O. Shear
              P. Metal gages
              Q. Bench with plate and stakes
              R. Riveting equipment
              S. Soldering equipment
            V. Layout Procedures
                A. Shop drawing
                B. Allowances for rivet spacings
                C. Cut out of pattern
                D. Rivet lines and rivet holes
                E. Final check of measurements
                F. Assessment of product IMC118Effective Term:
              VI. Sheet Metal Fittings
                  A. Riveted lap seam
                  B. Grooved lock seam
                  C. Flexible connection
                  D. Square elbow
                  E. Radius elbow
                  F. Change cheek elbow
                  G. 45 degree change cheek elbow
                  H. Rectangular Y-branch
                  I. 90 degree rectangular double Y-branch
                  J. 90 degree clinch tee
                  K. Ogee offset
                  L. Gored elbow
                  M. 90 degree tee intersecting a round pipe
                  N. 45 degree tee intersecting a round pipe
                VII. Ductrun Fittings
                    A. Rectangular pittsburg lock duct
                    B. Mitered duct piece
                    C. Round offset
                    D. Change joint transition
                    E. Double offset
                    F. Roof flange
                    G. Smokestack base over peak
                    H. A-type ventilator
                    I. Gutter section
                    J. Belt guard
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