Sheet metal pattern layouts: a practical, illustrated treatise covering all phases of sheet metal work including pattern cutting and pattern development ...
T. Audel, 1953 - Sheet-metal work - 1090 pages
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bend bottom brace center line circle cleats cone copper cornice curb curve describe the arc diameter divide dotted lines double seamed draw a line draw lines intersecting draw the line eave edge elbow eleva ellipse equal spaces erect feet flange front elevation girth gutter half pattern hight horizontal line hypotenuse inches joint laps line A B line traced lines drawn lines in plan measuring method miter cut miter line molding nailed obtain the pattern parallel pediment perpendicular piece pitch place the stretchout plan draw plan in Fig points thus obtained proceed as follows radial lines radii radius equal represent right angles riveted roof sheet metal shown by similar shown in Fig shows side elevation side view similar numbers skylight slate small figures soffit soldered square strip take the distance Trace a line true lengths upper vertical lines width zinc