Trouble with equations

[Supercartman]

Hi there I need some help.
I am making a equation for a beam I am designing.

My equations work however when I modify my dimensions my sketch does not stay centered.

I have done run into this problem before and have solved it....however today I am stumped and could use a hand.
The photo should better express the issue....

https://imgur.com/9YzqhXB

I would like the center beam to stay centered....what relation am I supposed to use for this?

Thank you so much!

Adam

 

[dstrausser]

I'm not sure what you are trying to do. Is the vertical part you wan to keep in the center of the 10? IOW; you want it to always look like an I-beam?

If so, you need a dimension from one of the ends to center of that part of the sketch. 10/2 and the 10*.6 will take care of itself.

Not sure this helps