Double line for multiple extrude line?

[hyposmurf]

This may sound a little muddled but what Im trying to do is extrude two squares but each has a shared boundary(they butt together).Only problem is that I need to extrude different heights for each square.Do I draw the shared boundary twice so I have two seperate squares to extrude?Maybe I need to extrude it once and start shaping it vis subtract,slice etc?

[CADTutor]

You'll need a seperate closed object for each extrusion, so 2 squares. Alternately, you could use one square, extrude and copy. Then use the extrude faces command to reduce/increase the extrusion of one of them.

[hyposmurf]

Thanks I'll give it a go.Does that mena if I have two faces I'll have an overlap of lines?Something I used to stay away from in 2D,as it would plot incorrectly.

[CADTutor]

Yes, one side of each square will be coincident with the other and the resulting extruded faces will be coplanar. That shouldn't present any problems.

[expaddy]

This may sound a little muddled but what Im trying to do is extrude two squares but each has a shared boundary(they butt together).Only problem is that I need to extrude different heights for each square.Do I draw the shared boundary twice so I have two seperate squares to extrude?Maybe I need to extrude it once and start shaping it vis subtract,slice etc?

I have had the same problem myself and I usually make 2 different layers and work on each individual part until I am ready to union, subtract or slice, hope this helps.

[hendie]

there are two options. I'm assuming from your info that you are planning to extrude "from above"
One, you extrude two squares at different heights and union them.
Two, consider extruding from the side ~ create a new UCS, draw the profile of the part and extrude that.

[hyposmurf]

Thats right I am.Ive found it a bit annoying when you want to extrude the object and have another placed over the top with the same boundary.Have to keep using the display order tool.I'll try both methods each of you have suggested and thanks.