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At Rill Architects we run ArchiCAD on Mac OS X. If you work at Rill, this is your stuff. If you don't, but you work in ArchiCAD, you may find something interesting. Anybody else, I don't know.
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Rebar Section
Location: 05 Metals / 2D Steel

A 2D symbol to draw rebars in concrete structures.

Arrangement: Same as the Multiply command. Spread will place bars across the length of the object using the Spacing OC. Distribute will space the Quantity of bars evenly along the length.

You might use Distribute in a footing detail, where the spec would call for a number of bars, and Spread in a wall detail, where the spec calls for bars at a given spacing.

With the Spread arrangement, the end of the object is represented by a non-printing cross symbol.

Perpendicular Bars draws a pair of dashed lines behind the bar dots, representing the bars going the other way.

Coverage Hotspots places detectable points on the edge of the section dots at both ends. Use these spots to place the rebar object acurately and to dimension the coverage.

Graphic Crosses draws a cross through each bar to help with visibility.