Loft G1 error: is it possible to create Angular lofts?

[maker9876]

I'm trying to model a girder using the loft command to connect 3 profiles.

First attempt using only the top rail works.

However resultant shape is too organic.

So introduce the bottom rail.

Get a "G1" error, which I understand to mean that Fusion wants the loft to approach at some kind of a tangent, not at an angle.

Is there anything I can do about this?

 

[michallach81 · Accepted solution]

Curves of a single rail need to be at least G1, for loft to succeed. In your situation I would try to make that shape in two steps. First loft from profile 1 to profile 2, second loft from profile 2 to profile 3. Use join option in loft dialog window.

[maker9876]

Many thanks.

Just done that and it works great!

For future reference, how does one ensure that lines will meet the G1 criterion?

[michallach81]

If you've drawn those line by yourself you need do ad tangent or smooth constraint.