Concrete bridge fence, general advice

Dear all,

I just started Grasshopper and was hoping it might form a solution for the complicated Rhino model I'm working on. We have to make an exact model of a bridge fence, that will be made in concrete. I spend the whole day working on a rhino model of one fence, and it's still not finished (there are 9 different ones), but chances are that some of the measurements will have to change later on. Then I won't be happy.

In the end, we need one closed polysurface, in order for the printer to work.

It's a huge amount of work to connect all the seperate pieces, delete overlapping surfaces, join, fillet etc etc. So, I was hoping for Grasshopper!

I've attached the Rhinofile of the example. This one still isn't one surface, some fillets are not connecting *sigh*

I would be so happy if I was able to even generate a small part in Grasshopper. I started with the middle frames. They are tapered to the top (2mm) and need a fillet (5mm). I'm afraid I need to do some sort of Boolean-Difference, since the lines I have, are the outlines of the cells, and not the complete branch. (I don't think this is possible?)

As I mentioned, I'm new to Grasshopper, and I'm afraid I'm in over my head with this one.

This is what I thought I should do:

INNER BRANCH STRUCTURE

- Select botton curves

- Move up 60 mm

- Offset 2mm to outside

- make volume (one way or the other)

- create large volume to extract cells from

- Boolean large volume and cells

- select top edges

- fillet edge 5mm <this didn't work in one go in Rhino, since there were problems with some of the surfaces....not sure how to fix this in Grasshopper>

OUTER FRAME

- Sweep2 all the section profiles along curves

- Intersect/boolean/join?

And then I need to join both the inner and the outer structure...

sigh....

It would be great If you guys could give me some tips to get me started! I'm lost!

Thank you so much!

Anja