Triangulation short-cut layouts: a textbook and working guide with practical and modern methods for laying out and forming patterns used for blower-exhaust systems, heating and air conditioning. Mathematical formulas applied to sheet-metal work
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Dividing Quarter Circles
Simple Method for Dividing a Line Into Equal Spaces
Dividing Into Six Twelve or TwentyFour Equal Spaces
155 other sections not shown
13 in Figure angle arc at point arc crossing base line C-D in Figure center crotch line center to draw center to strike circle in Figure circumference Complete the pattern crossing the arc diameter dimensions shown distance from point Draw a line draw an arc draw arcs draw line draw the half ellipse equal spaces freehand crotch curve freehand curved line FRONT VIEW half bottom view half pattern height of line intersect line isometric view lengths from point line from point lines in Figure lines to lay main branch miter line obtaining point obtaining the freehand obtaining the slant pattern in Figure point 13 points 9 procedure quarter circle radius point Rectangular-to-Round remaining pattern rivet holes side view slant line slant true-length lines square-to-round strike an arc top view Transfer the distance Transfer the height Transfer the lengths Transfer the slant true-length triangle view in Figure VIEW Plate