Hi! 

I am trying to create a parametrical cabinet module that would have a back out of 3mm HDF with 16mm particle board supporting bars behind (I believe this must be done as a sturcture). 

The criteria is as follows: 

1) The overall width and height are variables.

2) The back bars (1;2;3) heights are fixed as 100mm.

3) Top and bottom bars (1;3) are fixed to top and bottom panels. 

4) The centre bar is fixed in centre of the zone or the cabinet height. However, would have an option to unfix it from centre and move up or down as needed. 

5) The space in between bars (A;B) would be equal in case the centre bar is fixed to centre.

6) The space in between bars (A;B) would be max. 700mm. In case this dimension would be greater, an extra bar will be applied to the centre of this space (with an option to unfix it from centre and move as needed). 

7) Single panel fittings like screw holes to be attached automatically 8mm from top and/or bottom edge to create fitting link with top, bottom or fixed panel.

8) Tongue & Groove to be attached to the sides linked to 3mm HDF board automatically when applying this structure to cabinets. 

9) Fitting links are attached to each back bar seperately and centred on the height of the bar. This is so the fitting links would move along with the bar when changing the overall height of the structure (Similarly to single panel fittings but on edges instead). 

Hope all this makes sense. Please feel free to ask if anything is confusing. 

Can you please help me to figure out how to make such construction? 🙂