Maricopa Community Colleges  HFA150   19996-20012 
Official Course Description:   MCCCD Approval:  06/22/99
HFA150      19996-20012 LEC 5 Credit(s) 5 Period(s)
Shop Fabrication: Layout and Pattern-making for Insulators I
Shop fabrication for the heat, frost and asbestos trades related to insulation. Draw, bisect, trisect, divide and construct geometric linear and curvilinear geometric constructions. Layout and design templates and patterns for tees, valves, flanges, and endcaps. Prerequisites: None.
 
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MCCCD Official Course Competencies:
 
HFA150   19996-20012 Shop Fabrication: Layout and Pattern-making for Insulators I
1. Bisect a straight line and an angle. (I)
2. Construct a perpendicular to a straight line at a given point on the line. (II)
3. Drop a perpendicular from a given point to a line. (III)
4. Draw a straight line parallel to a given line. (IV)
5. Divide a line into a selected number of equal parts. (V)
6. Draw a quarter and half circle. (VI)
7. Bisect, trisect and divide a quarter circle. (VII)
8. Divide the circumference of a circle into a selected number of equal parts. (VIII)
9. Layout template and patterns for an equal tee or valves. (IX)
10. Layout patterns for an unequal tee or valves. (X)
11. Layout patterns for flanges and endcaps. (XI)
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MCCCD Official Course Outline:
 
HFA150   19996-20012 Shop Fabrication: Layout and Pattern-making for Insulators I
    I. Bisect
        A. Straight line
          1. draw arc that intersects line at two points
          2. draw equal intersecting arcs from two points
          3. connect points with a line
        B. Angle
          1. strike arc that intersects the two legs of the angle
          2. strike equal intersecting arcs from two points
          3. draw line through two points
      II. Perpendicular
          A. Draw an arc from the point on the line that intersects the line at two points
          B. Draw equal intersecting arcs from two points
          C. Connect two points with a line
          D. Repeat steps and procedures from figures on worksheet
        III. Drop Perpendicular
            A. Draw an arc that intersects line at two points
            B. Locate second point needed to determine perpendicular line
            C. Draw perpendicular from one point to the line
            D. Repeat steps and procedures from figures on worksheet
          IV. Parallel
              A. Draw two arcs above and below the line
              B. Draw line tangent to the two arcs
              C. Repeat steps and procedures from figures on worksheet
            V. Divide line
                A. Draw an angle with line as one side
                B. Set off equal divisions
                C. Project all divisions back to the line
                D. Repeat steps and procedures from figures on worksheet
              VI. Draw
                  A. Quarter circle
                    1. draw perpendicular to a line at a specified point
                    2. set compass or dividers to a desired radius
                    3. draw quarter circle using a point as the center
                    4. label points of intersection of the quarter circle with line
                    5. repeat steps and procedures for lines on worksheet
                  B. Half circle
                    1. bisect line and label midpoint
                    2. set compass or divider to required radius
                    3. draw half circle using one as center
                    4. repeat steps and procedures for lines on worksheet
                VII. Quarter Circle
                    A. Bisect
                    B. Trisect
                    C. Divide
                  VIII. Circumference
                      A. Find radius of circle
                      B. Determine length of radius
                      C. Multiply radius x weight
                      D. Set compass or dividers to product found in C
                      E. Mark off number of equal parts on circle
                      F. Repeat steps and procedures to complete examples on worksheet
                    IX. Equal Tee or Valves
                        A. Template
                        B. Pattern
                          1. find circumference and width of body / height of bonnet
                          2. draw two lap lines
                          3. draw centerline
                          4. trace template
                          5. cut out pattern
                      X. Unequal Tee or Valves
                          A. Valve Body
                          B. Valve Bonnet
                        XI. Patterns
                            A. Flanges
                            B. Endcaps
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