Metric Tutorials - Autodesk

710 | Chapter 23 Roofs
5 Select the exterior edges of the three walls that create the rear addition to the house. Verify that
a dashed blue line displays on the exterior side of the wall from the edge of the roof as you select
the walls.
Next, close the roof sketch. Roof sketches must create a closed loop before you can create the
roof. The sketched lines cannot overlap or intersect each other.
6 On the Sketch tab of the Design Bar, click Lines.
7 On the Options Bar, clear Defines Slope, and click (Pick Lines).
8 Select the exterior edge of the uppermost horizontal wall of the main building, using the following
illustration for guidance.
Next, trim the extra line segments that result from the intersection of the sketch lines. You must
trim these lines to create a valid sketch.
9 On the Tools toolbar, click (Trim/Extend).
10 On the Options Bar, verify that the Trim/Extend to Corner option is selected.
11 To trim the first line segment, select the left vertical slope definition line, and then specify a
point near the midpoint of the line that you sketched along the wall of the main building.
Make sure you select the segment on the side that you want to keep.