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1 Icon: [[image:1584703700385-304.png]]
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3 The step of a reference line (straight or arc) definition by selecting a previously defined line:
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5 Select lines or region (drawing or structural object) edges define the requested shape of the reference line with one of the **selection modes**.
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8 [[image:1584703730394-657.png]]
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10 Figure: An example for defining Wall by selecting all lines
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13 [[image:1584703738417-292.png]]
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15 Figure: Defining Beams and Walls on Plate edges (1.) and Line supports on Wall edges (2.)
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17 |[[image:warning.png]]|For //Columns// in FEM-Design 3D Modules, only vertical lines or edges can be selected.
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19 [[image:1584703789832-946.png]]
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21 Figure: Column definitions by selecting vertical lines/edges
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