Maricopa Community Colleges  ABA226   20052-20086 
Official Course Description: MCCCD Approval: 10/26/04
ABA226 20052-20086 LEC 0.50 Credit(s) 0.50 Period(s)
Field Measuring and Fitting
Field measuring practices including applicable mathematical formulas and functions. Includes problem solving exercise.
Prerequisites: (Registered apprentice status and ABA152) or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABA226   20052-20086 Field Measuring and Fitting
1. Describe specific practices used for field measuring and layout of ductruns and fittings. (I)
2. Explain the mathematical formulas and functions used in field measuring and fitting. (II)
3. Demonstrate competence in solving selected field measuring problems. (III)
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MCCCD Official Course Outline:
 
ABA226   20052-20086 Field Measuring and Fitting
    I. Field Measuring
        A. Materials
          1. Shop drawing
          2. HVAC design drawing
          3. Architectural plan
          4. 6-8 foot folding rule
          5. 10, 50 and 100 foot measuring tapes
          6. Plumb bob and chalk line
          7. Yellow crayon or chalk
          8. Long, thin measuring stick or rod
        B. Purpose
          1. Alterations
          2. Additions
          3. Verification of dimensions
          4. Field-check locations
        C. Procedures
          1. Duct connections
          2. Equipment locations
          3. Obstructions
          4. Offsets
          5. Plan and elevation views
      II. Mathematics for Field Measuring
          A. Trigonometric Formulas
            1. Complementary angles
            2. Right angles
          B. Functions
            1. Sine
            2. Cosine
            3. Tangent
            4. Cotangent
          C. Trigonometric functions table
        III. Field Measuring Problems
            A. Round elbows
              1. Definitions
              2. Problem
              3. Formulas
            B. Round offsets
              1. Definitions
              2. Problem
              3. Formulas
            C. Rectangular duct
              1. Problem
              2. Formulas
            D. Rectangular duct offsets
              1. Problem
              2. Formulas
            E. Plain offsets for rectangular duct
              1. Problem
              2. Formulas
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