{"id":40,"date":"2023-02-06T11:46:13","date_gmt":"2023-02-06T16:46:13","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/level2layout\/?post_type=chapter&p=40"},"modified":"2023-03-30T12:13:57","modified_gmt":"2023-03-30T16:13:57","slug":"square-2-round-on-a-pitch","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/level2layout\/chapter\/square-2-round-on-a-pitch\/","title":{"raw":"Square to Round on a Pitch","rendered":"Square to Round on a Pitch"},"content":{"raw":"https:\/\/www.youtube.com\/watch?v=Bhq_wCJkVR4\r\n\r\n \r\n\r\n \r\n
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  1. Draw a complete elevation view<\/strong>. Keep in mind that any plan view<\/strong> would need to be projected from the elevation view<\/strong> to keep the end on a pitch to correct shape, it will not be viewed as the original size in a plan view<\/strong> because of the pitch.<\/li>\r\n<\/ol>\r\n\"\"\r\n\r\n \r\n\r\n \r\n
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    1. Draw profiles<\/strong> at each end of the elevation view<\/strong>. The square end will be a rectangular profile<\/strong>, while the round will be a half round shape.<\/li>\r\n<\/ol>\r\n\"\"\r\n\r\n \r\n\r\n \r\n
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      1. Draw in all element lines<\/strong> and label the elevation view<\/strong>. It is recommended to use letters on the square end and numbers on the round.<\/li>\r\n<\/ol>\r\n\"\"\r\n\r\n \r\n\r\n \r\n
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        1. Start the pattern by drawing the True Length (TL)<\/strong> of line A-B on a horizontal plane, remember that this line is a true length<\/strong> in the elevation view<\/strong>. Similar to plan view triangulation, a square to round should always be started from a horizontal line, A-B.<\/strong><\/li>\r\n<\/ol>\r\n\"\"\r\n\r\n \r\n\r\n \r\n
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          1. Find the TL of line A-4<\/strong>. Swing the element line<\/strong> A-4 from point A and transfer it to the baseline A-B of the elevation view<\/strong>. Note: The baseline A-B may need to be extended to fit A-4.<\/li>\r\n<\/ol>\r\n\"\"\r\n\r\n \r\n\r\n \r\n
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            1. Next we will find the \u201cdifference in profile\u201d<\/strong> for this line. Take profile line<\/strong> at point 4 and transfer it to line D-A of the profile on the elevation view<\/strong>. It must<\/strong> be started from the outside of the profile, point D, and work inwards.<\/strong> This leaves the difference at the 90 deg corner of D-A-B.<\/li>\r\n<\/ol>\r\n\"\"\"\"\r\n\r\n \r\n\r\n \r\n
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              1. The TL<\/strong> of line A-4 will be the hypotenuse of the triangle we just made. From the difference in profile<\/strong> to the length of line A-4 on the baseline.<\/li>\r\n<\/ol>\r\n \r\n
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                1. Pick up the TL<\/strong> of line A-4 and swing it from point A on the pattern.\"\"<\/li>\r\n<\/ol>\r\n \r\n\r\n \r\n
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                  1. Find the TL of line B-4<\/strong>. Pick up element line<\/strong> B-4 from the elevation view<\/strong> and swing it to the baseline.<\/li>\r\n<\/ol>\r\n \r\n
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                    1. Take profile line<\/strong> 4 and transfer it to line C-B, starting from the outside again.\"\"<\/li>\r\n<\/ol>\r\n \r\n\r\n \r\n
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                      1. Pick up the TL<\/strong> of line B-4 and swing it from point B on the pattern. This has now created point 4 on our pattern.<\/li>\r\n<\/ol>\r\n\"\"\r\n\r\n \r\n\r\n \r\n
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                        1. Now, we will keep working one side of the fitting. Pick up element line<\/strong> A-3 and swing it to the baseline.<\/li>\r\n<\/ol>\r\n \r\n
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                          1. Take profile line<\/strong> 3 and transfer it, starting from point D, along line D-A.<\/li>\r\n<\/ol>\r\n \r\n
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                            1. Pick up the TL<\/strong> of line A-3 and swing it from point A on the pattern.<\/li>\r\n<\/ol>\r\n \r\n\r\n \r\n
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                              1. Take step off<\/strong> 4-3 from the profile<\/strong> and swing it from point 4 on the pattern. This has created point 3.<\/li>\r\n<\/ol>\r\n\"\"\r\n\r\n \r\n\r\n \r\n
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                                1. Pick up line A-2 from the elevation view<\/strong> and swing it to the baseline.\"\"<\/li>\r\n<\/ol>\r\n \r\n\r\n \r\n
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                                  1. Take profile line<\/strong> 2 and transfer it from point D along line D-A.\"\"<\/li>\r\n<\/ol>\r\n \r\n\r\n \r\n
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                                    1. Pick up the TL<\/strong> of line A-2 and swing it from point A on the pattern.\"\"<\/li>\r\n<\/ol>\r\n \r\n\r\n \r\n
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                                      1. Take step off<\/strong> 3-2 from the profile<\/strong> and swing it from point 3 on the pattern. This has created point 2.<\/li>\r\n<\/ol>\r\n \r\n
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                                        1. Pick up line A-1 from the elevation view<\/strong> and swing it to the baseline.<\/li>\r\n<\/ol>\r\n \r\n
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                                          1. Since there is no line at profile 1, we use all of line D-A as the difference. We still need to think of this as a difference, so line A-D minus 0 is the full length of line A-D. The full length is the difference, so the TL is taken from point D. <\/strong><\/li>\r\n<\/ol>\r\n\"\"\r\n\r\n \r\n\r\n \r\n
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                                            1. Pick up the TL<\/strong> of line A-1 and swing it from point A on the pattern.<\/li>\r\n<\/ol>\r\n \r\n
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                                              1. Take step off<\/strong> 2-1 from the profile<\/strong> and swing it from point 4 on the pattern. This has created point 1.<\/li>\r\n<\/ol>\r\n \r\n
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                                                1. The next point creates the wings of the fitting. When we look at the elevation view<\/strong>, we have 2 lines which overlay each other. Both A-1 and D-1 look to be the same, but they are not. Line A-1 comes from the front of the fitting to the center, that's why we need to find the true length<\/strong>. Line D-1 goes from center to center, meaning it is standing straight up, without leaning over. Line D-1 is the only one which is a true length<\/strong> in the elevation view<\/strong>. We can take line A-1 directly as the true length<\/strong> of line D-1 because there is no profile<\/strong> left at either end. The outside edges are always true lengths because they are on center and we know they are not leaning. <\/strong><\/li>\r\n<\/ol>\r\n \r\n\r\n \r\n
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                                                  1. Swing the TL<\/strong> of line D-1 from point 1 on the pattern. Notice that every line we swung upwards, we needed to find the true length, but the 1 line we swung downward was a true length directly in the elevation view. This is always the case and should be remembered as an important part of this process.\"\"<\/strong><\/li>\r\n<\/ol>\r\n \r\n\r\n \r\n
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                                                    1. Pick up line A-D from the profile of the elevation view<\/strong>, (this is a true length) and swing it from point A on the pattern. This creates the wings which need to be 90 deg at point D. Again, both lines that form the wings are true lengths directly from the elevation view!!!<\/strong><\/li>\r\n<\/ol>\r\n\"\"\r\n\r\n \r\n\r\n \r\n
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                                                      1. Repeat the entire process for the other side until the full half pattern is complete.\"\"<\/li>\r\n<\/ol>","rendered":"