Create a Single-plane Roof on the Floor Plan

Note: Apart from drawing a new Roof as described below, you can also select a Multi-plane Roof and split it into several Single-plane Roofs, using Edit > Reshape > Split into Single-plane Roofs or Design > Roof Extras > Split into Single-plane Roofs.

1.Select the Roof Tool. In Roof Settings or the Info Box, adjust the main roof parameters (e.g. pitch, surfaces).

2.Choose the Single-plane construction method from the Info Box or from Roof Settings.

3.Choose one of the three geometry methods in the Info Box (Polygon, Rectangle, Rotated Rectangle)

//helpcenter.graphisoft.com/wp-content/uploads/ac21_help/03-1-elements-virtual-building/RoofGeomMethods.png 

4.On the Floor Plan, click twice to define the Roof’s pivot line.

In most cases, you will want the pivot line of the roof to coincide with a wall Reference Line or a slab edge.

5.The eyeball cursor appears. Click on the side of the pivot line where you want the roof plane to rise (or, in the case of a negative roof pitch, slope downward).

//helpcenter.graphisoft.com/wp-content/uploads/ac21_help/03-1-elements-virtual-building/PivotLine1.png     //helpcenter.graphisoft.com/wp-content/uploads/ac21_help/03-1-elements-virtual-building/PivotLine2.png

6.Draw the contour of the roof by clicking on each of the new roof’s nodes. Or use the Magic Wand: click on an existing element to serve as the pattern for the roof’s contour.

See also Magic Wand.

//helpcenter.graphisoft.com/wp-content/uploads/ac21_help/03-1-elements-virtual-building/RoofFloorPlan.png     //helpcenter.graphisoft.com/wp-content/uploads/ac21_help/03-1-elements-virtual-building/Roof3D.png

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