Column and sloped slab

[dpasa]

Can a column attach to a roof like a wall? I think not... The only way I found was to add a solid to fill the gap... Is there something else? Should I edit the column family and add params like ref lines or planes etc???

I believe this should be done automatically, like the walls...

[kevellis]

Yes you can attach to roofs.
If there is still a gap (this can happen If the roof is sloped) you can use the"Offset From Attachment At Top" parameter to adjust for any gaps.

[Dimitri Harvalias]

When you select the column and pick attach from the options bar Revit will give you a number of options for how the column attaches to the underside of the floor/roof. There should be no gap issues if you use the correct option (maximum intersection in the case of a sloped roof)

[dpasa]

Thanks, I can't believe I didn't check the options bar! After all, this is not the first column I want to attach! Well, I'm getting old...