{"id":175,"date":"2020-11-17T13:49:02","date_gmt":"2020-11-17T18:49:02","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/pressbookbccampussmlt1\/part\/parallel-line-pattern-development\/"},"modified":"2023-03-17T13:01:25","modified_gmt":"2023-03-17T17:01:25","slug":"parallel-line-pattern-development","status":"publish","type":"part","link":"https:\/\/pressbooks.bccampus.ca\/pressbookbccampussmlt1\/part\/parallel-line-pattern-development\/","title":{"raw":"Parallel Line Pattern Development","rendered":"Parallel Line Pattern Development"},"content":{"raw":"

Introduction<\/h1>\nWhen wanting to build a project, we need to first imagine it. The process of pattern development gives us the ability to take that visual representation and actually create the object. It allows us to turn two-dimensional metal into three-dimensional objects, which is the basis for everything we fabricate.\n\nConsider a globe and a map. The map is a 2D representation of a 3D object. What should the map look like? Is it truly flat? Well, maybe some would argue, but a map is not a true representation of the Earth until we remove some of it. The actual shape of the map will have numerous \u201ccut outs\u201d which would allow it to form a sphere. This is a form of pattern development.\n
\n

Learning Objectives<\/p>\n\n<\/header>\n

\n
    \n \t
  1. Understand the parallel line pattern development processes.<\/li>\n \t
  2. Understand the \"language\" of layout.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n
    \n

    Layout Terms<\/p>\n\n<\/header>\n

    \n
      \n \t
    1. Allowance <\/strong>- the material needed for a specific component. \u201cWe must allow this much extra.\u201d Usually a seam for connection.<\/li>\n \t
    2. Auxiliary Line <\/strong>- an extra element line added, different from the standard divisions.<\/li>\n \t
    3. Elbow Rule <\/strong>- the number of pieces of a round elbow times 2 then minus 2 (# of pcs \u00d7 2 \u2212 2) gives us the number of gores in the elbow.<\/li>\n \t
    4. Element Line\u00a0<\/strong>- a line representing an edge or bend.<\/li>\n \t
    5. Elevation View <\/strong>- looking at the front or side of something, to have elevation (height), 2D.<\/li>\n \t
    6. Gore <\/strong>- a part of a round elbow which allows us to calculate the miter angle.<\/li>\n \t
    7. Miter <\/strong>- an intersection of 2 pieces, an irregular cut on the end of something.<\/li>\n \t
    8. Pattern <\/strong>- the shape of the object, still in 2D form.<\/li>\n \t
    9. Plan view <\/strong>- looking down at something, a \u201cbirds eye view,\u201d \u201cfloor plan,\u201d (2D).<\/li>\n \t
    10. Profile <\/strong>- a half of a plan view, drawn on the outside of an object.<\/li>\n \t
    11. Sector <\/strong>- a special profile which is inside of an object, a section view.<\/li>\n \t
    12. Stretch-out <\/strong>-a shape which has been \u201cstretched out,\u201d to take a perimeter and make it straight.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

      Parallel Line Development<\/h1>\nThe process of pattern development is the way we turn 2D sheets of metal into 3D objects. A [pb_glossary id=\"510\"]parallel line[\/pb_glossary]<\/strong> is one of the basic forms of layout. We use it when [pb_glossary id=\"527\"]element lines[\/pb_glossary]<\/strong> (bends) on an object are indeed parallel. The two ends of the part must be the same. Consider a gutter: It may have curves and bends and angles, but each end is the same shape. The element lines and bends are all parallel. This is the only<\/strong> factor which will allow parallel line pattern development to be used.\n

      Basic Steps<\/h1>\n
        \n \t
      1. Draw a full [pb_glossary id=\"532\"]plan[\/pb_glossary]<\/strong> and [pb_glossary id=\"528\"]elevation view[\/pb_glossary]<\/strong>, complete with all [pb_glossary id=\"527\"]element lines[\/pb_glossary]<\/strong> and [pb_glossary id=\"530\"]miter lines[\/pb_glossary]<\/strong>.<\/li>\n \t
      2. Draw a [pb_glossary id=\"534\"]stretch-out[\/pb_glossary]<\/strong>, complete with all element including auxiliary lines.<\/li>\n \t
      3. Transfer the lengths (height) of the element lines from the elevation view to the corresponding element line on the stretch-out.<\/li>\n \t
      4. Join the point to create the pattern.<\/li>\n<\/ol>","rendered":"

        Introduction<\/h1>\n

        When wanting to build a project, we need to first imagine it. The process of pattern development gives us the ability to take that visual representation and actually create the object. It allows us to turn two-dimensional metal into three-dimensional objects, which is the basis for everything we fabricate.<\/p>\n

        Consider a globe and a map. The map is a 2D representation of a 3D object. What should the map look like? Is it truly flat? Well, maybe some would argue, but a map is not a true representation of the Earth until we remove some of it. The actual shape of the map will have numerous \u201ccut outs\u201d which would allow it to form a sphere. This is a form of pattern development.<\/p>\n

        \n
        \n

        Learning Objectives<\/p>\n<\/header>\n

        \n
          \n
        1. Understand the parallel line pattern development processes.<\/li>\n
        2. Understand the “language” of layout.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n
          \n
          \n

          Layout Terms<\/p>\n<\/header>\n

          \n
            \n
          1. Allowance <\/strong>– the material needed for a specific component. \u201cWe must allow this much extra.\u201d Usually a seam for connection.<\/li>\n
          2. Auxiliary Line <\/strong>– an extra element line added, different from the standard divisions.<\/li>\n
          3. Elbow Rule <\/strong>– the number of pieces of a round elbow times 2 then minus 2 (# of pcs \u00d7 2 \u2212 2) gives us the number of gores in the elbow.<\/li>\n
          4. Element Line\u00a0<\/strong>– a line representing an edge or bend.<\/li>\n
          5. Elevation View <\/strong>– looking at the front or side of something, to have elevation (height), 2D.<\/li>\n
          6. Gore <\/strong>– a part of a round elbow which allows us to calculate the miter angle.<\/li>\n
          7. Miter <\/strong>– an intersection of 2 pieces, an irregular cut on the end of something.<\/li>\n
          8. Pattern <\/strong>– the shape of the object, still in 2D form.<\/li>\n
          9. Plan view <\/strong>– looking down at something, a \u201cbirds eye view,\u201d \u201cfloor plan,\u201d (2D).<\/li>\n
          10. Profile <\/strong>– a half of a plan view, drawn on the outside of an object.<\/li>\n
          11. Sector <\/strong>– a special profile which is inside of an object, a section view.<\/li>\n
          12. Stretch-out <\/strong>-a shape which has been \u201cstretched out,\u201d to take a perimeter and make it straight.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

            Parallel Line Development<\/h1>\n

            The process of pattern development is the way we turn 2D sheets of metal into 3D objects. A parallel line<\/a><\/strong> is one of the basic forms of layout. We use it when element lines<\/a><\/strong> (bends) on an object are indeed parallel. The two ends of the part must be the same. Consider a gutter: It may have curves and bends and angles, but each end is the same shape. The element lines and bends are all parallel. This is the only<\/strong> factor which will allow parallel line pattern development to be used.<\/p>\n

            Basic Steps<\/h1>\n
              \n
            1. Draw a full plan<\/a><\/strong> and elevation view<\/a><\/strong>, complete with all element lines<\/a><\/strong> and miter lines<\/a><\/strong>.<\/li>\n
            2. Draw a stretch-out<\/a><\/strong>, complete with all element including auxiliary lines.<\/li>\n
            3. Transfer the lengths (height) of the element lines from the elevation view to the corresponding element line on the stretch-out.<\/li>\n
            4. Join the point to create the pattern.<\/li>\n<\/ol>\n
              definition<\/span>