Maricopa Community Colleges  HVA140AF   19932-19964 
Official Course Description: MCCCD Approval: 04/23/96
HVA140AF 19932-19964 LEC 5 Credit(s) 5 Period(s)
Sheet Metal: Ducts, Drainage and Ventilation
Process of soldering common and special materials. Methods for supporting ducts including taping of hangers and fasteners. Calculations for roof drainage systems. Principles of ventilation. Safety procedures stressed. Prerequisites: None.
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MCCCD Official Course Competencies:
 
HVA140AF   19932-19964 Sheet Metal: Ducts, Drainage and Ventilation
1. Describe the care and repairing of soldering copper including reshaping and cleaning. (I)
2. Explain the process of soldering specific types of seams including flat lap, vertical lap, grooved and riveted seams. (II)
3. Explain the process of soldering specific materials such as aluminum and stainless steel. (III)
4. Explain the safety procedures for soldering and using gas torches. (IV)
5. Explain safety procedures for using acid and non-acid fluxes. (IV)
6. Describe specific basic methods for supporting ducts. (V)
7. Identify specific materials used for ducts supports. (V)
8. Identify specific types of hangers/fasteners and explain advantages/disadvantages of each. (VI)
9. Determine hanger spacing for specific types of ducts. (VII)
10. Calculate roof drainage systems for down-spout sizing, gutters and drains. (VIII)
11. Explain the structure of flat roofs and respective flashing components. (IX)
12. Select proper gauges for specific materials including material/insert system and flashing receiver. (X)
13. Explain the principles of ventilation including methods for implementing ventilation of specific spaces. (XI)
14. Describe local codes regarding ventilation. (XII)
15. Calculate ventilation rates for specific areas including crawl spaces and attics. (XII)
16. Calculate ventilation rates for specific fume and particulate removal. (XII)
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MCCCD Official Course Outline:
 
HVA140AF   19932-19964 Sheet Metal: Ducts, Drainage and Ventilation
    I. Soldering Copper
        A. Reshaping
        B. Clean
        C. Tin
      II. Types of Seams
          A. Flat lap
          B. Vertical lap
          C. Grooved
          D. Riveted
          E. Bottom
        III. Special Material
            A. Aluminum
            B. Stainless steel
          IV. Soldering and Flux Safety
              A. Soldering copper
              B. Gas torch
                1. Regulator
                2. Hoses
              C. Flux
                1. Acid
                2. Non-acid
              D. Ventilation of work area
              E. Eye care
            V. Duct Support Methods and Material
                A. Support methods
                  1. Strap hangers
                  2. Trapeze
                  3. Round duct hangers
                  4. Riser
                    a. Floor
                    b. Wall
                  5. Tie-rod
                B. Support material
                  1. Sheet metal straps
                  2. Angle-iron
                  3. Threaded rod
                  4. Wire
              VI. Types of Hangers and Fasteners
                  A. Screws
                    1. Sheet metal
                    2. Self-tapping
                    3. Self-drilling
                  B. Concrete inserts
                  C. Beam clamps
                  D. Metal deck hangers
                  E. Isolators
                VII. Hanger Spacing
                    A. Fiberglass ducts
                    B. Riser support
                    C. Flexible duct
                    D. Types and guages of hangers
                    E. Rectangular duct
                    F. Round duct
                  VIII. Drainage Systems
                      A. Terminology
                      B. Down-spout sizing
                      C. Gutter
                      D. Number of drains
                    IX. Built-Up Roofs and Flashing
                        A. Roof material
                        B. Flashing
                          1. Base
                          2. Cap
                          3. Counter
                      X. Material Gauges
                          A. Receiver and insert system
                          B. Flashing receiver
                          C. Systems not using raggles
                        XI. Principles of Ventilation
                            A. Moisture removal
                            B. Indoor contamination
                            C. Methods
                              1. Infiltration
                              2. Forced
                            D. Specific Spaces
                          XII. Ventilation Rates
                              A. Crawl space
                              B. Attic
                              C. Fumes and particulates
                              D. Local codes
                              E. Safety
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