Stretching dynamic block

[nra]

Hi,

 

 

I'm trying to creat a dynamic block for concrete drawing.

I accomplished to make length and width variabel. But the middle bar does not stretch, it moves. Can someone help me? What i'm doing wrong?

 

 

On the link below you can find the dwg file

https://www.dropbox.com/s/798b595y2m88k9t/probleem%20stretch.dwg?dl=0

 

 

I hope someone can help me!

[tzframpton]

You had the right idea, just the wrong Action. Instead of stretch, I simply used the Move Action, but decreased the multiplier to 0.5 since it's mathematically half the distance of the first and second points on the Distance parameter. Seems to be working just fine now.

 

probleem stretch_TZF.dwg