Maricopa Community Colleges  ABC141   19956-20002 
Official Course Description:   MCCCD Approval:  04/25/95  
ABC141      19956-20002 LEC 0.50 Credit(s) 0.50 Period(s)
SMACNA Manuals & Duct Fab Standards
Standards, codes and ordinances, according to the Sheet Metal and Air Conditioning Contractors National Association (SMACNA) manuals. Operating pressures, specific sealing requirements, connectors, reinforcing/gage requirements, specific seam types for duct fabrication and use of charts and tables. Prerequisites: (Indentured status with the Arizona Builders Alliance) or permission of the apprenticeship coordinator.
 
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MCCCD Official Course Competencies:
 
ABC141   19956-20002 SMACNA Manuals & Duct Fab Standards
1. Use SMACNA manuals to determine standards for specific sheet metal jobs and to identify other specific standards, ordinances and codes. (I)
2. Define "operating pressure" and describe its affect on duct system design. (II)
3. Determine sealing requirements, gage requirements, minimum connector and reinforcing for specific duct runs using selected tables and charts. (III)
4. Describe the purpose of tie rods and explain when, where and why they are used. (IV)
5. Identify specific types of seams and state their limitations and proper application. (IV)
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MCCCD Official Course Outline:
 
ABC141   19956-20002 SMACNA Manuals & Duct Fab Standards
    I. SMACNA Manuals
        A. Standards
        B. Basic duct construction
          1. Feet per minute
          2. Water gage measurement
        C. Fittings and other construction
        D. Round, oval and flexible duct
        E. Hangers and supports
        F. Exterior components
        G. Equipment and casings
        H. Functional criteria
        I. Other associations, manuals and publications
          1. American society of heating, refrigeration and air conditioning engineers (ASHRAE)
          2. Air conditioning contractors of america (ACCA)
          3. Thermal insulation manufacturers association (TIMA)
          4. Architectural sheet metal manual
          5. Fibrous glass duct construction standard
          6. Other
        J. Fire and smoke protection
      II. Sheet Metal Duct Fabrication Standards
          A. Operating pressure
            1. Definition
            2. Water gage
            3. Design
          B. Leakage
          C. Seal classes
            1. No seal
            2. Class "A"
            3. Class "B"
            4. Class "C"
        III. Duct Fabrication
            A. Gage and connector
            B. Duct table
            C. Gage
            D. Intermediate reinforcing
            E. Connector and intermediate reinforcing
            F. Connector joints
              1. Slip and drive
              2. Hemmed "s" slip
              3. Inside slip joint
              4. Pocket lock
              5. Flanges
              6. Other
          IV. Duct Construction
              A. Connector with tie rod
              B. Intermediate reinforcement with tie rod
              C. Longitudinal seams
                1. Pittsburgh lock
                2. Snap lock
                3. Grooved seam
                4. Single/double corner seams
                5. Standing seams
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