OFFSET

OFFSET creates a new object whose shape parallels the shape of a selected object. Offsetting a circle or an arc creates a larger or smaller circle or arc, depending on which side you specify for the offset.

You can offset
· Lines
· Arcs
· Circles
· Ellipses and elliptical arcs

(Resulting in an oval-shaped spline)
· 2D polylines
· Construction lines (xlines) and rays
· Splines

Special Cases for Offset Polylines and Splines
2D polylines and splines are trimmed automatically when the offset distance is larger than can otherwise be accommodated.

Closed 2D polylines that are offset to create larger polylines result in potential gaps between segments. The OFFSETGAPTYPE system variable controls how these potential gaps are closed.

Exercise –

1. Using appropriate offset distances create 6” thk outer wall of the structure with 5’ margin from left, right and rare side and 15’ from front side.
2. Offset the left inner vertical line with 10’ distance towards right and 6” further to right for wall thickness.
3. Offset the lower inner horizontal line with 8’, 3,9”, 3,9” upwards for left bay and 10’ and 8’upwards for right bay. Offset all these lines upwards with 6”distance for wall thickness.

Your drawing should look like the drawing in the picture.

We have all these lines drawn on ‘0’ layer and we want them on ‘A-Line-Sec’ layer. We will see tomorrow how to change the layer property of these lines. Stay tuned…!