Polar Parameters

I get the following straight from AutoCAD 2006 Help:

To add a polar stretch action to a block definition

1. In the Block Editor, in the Block Authoring Palettes window, Actions tab, click the Stretch Action tool.

2. In the Block Editor drawing area, select a polar parameter to associate with the action. (You can associate only a polar parameter with a polar stretch action.)

3. Do one of the following to select a parameter point to associate with the action:

Use the pointing device.

Follow the prompts on the command line.

4. Do one of the following to specify the first corner of the stretch frame:

Use the pointing device.

Enter the X and Y coordinate values, separated by a comma.

5. Do one of the following to specify the opposite corner of the stretch frame:

Use the pointing device.

Enter the X and Y coordinate values, separated by a comma.

6. Select the objects to stretch or move.

7. Press ENTER.

8. Select the objects that you want to rotate.

(The objects you select in steps 6 and 8 make up the polar stretch action’s selection set.)

9. Press ENTER.

10. (Optional) Follow the prompts on the command line to specify distance and offset.

11. Do one of the following to specify the location of the action:

Use the pointing device.

Enter the X and Y coordinate values, separated by a comma.

Note The action location in the block definition has no effect on the appearance or functionality of the block reference.

12. On the Block Editor toolbar, click Save Block Definition.

13. If you are finished using the Block Editor, click Close Block Editor.

What's up with the 1st step?

You need a polar stretch.

Here is my latest drawing, submitted for your critique.

CHP10 BLK DYN POLAR PARAMETER CRANE 002.dwg

That's it in a nutshell. Try playing around with the different settings for the parameter under its properties, you can change the distance to be constrained to different increments or even preset lengths from a list. On a polar parameter you also have the option to do the same type of things with its angle.

When this featured Dynamic Block is selected and stretched a new stud is inserted when the pointer passes beyond 16 inches.

CHP10 BLK DYN ARRAY STUD BAY.dwg