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Strange double post on spiral stair railing

David Collins
Advocate
Can someone who has a better relationship with the stair and railing tools tell me why I’m getting a double post at the top of this associated railing for a spiral stair? Both the stair and the associated railing baselines are simple arcs with nodes only at the endpoints.
I’m guessing it has something to do with the stair settings because I can create a simple railing on the floor following the same arc with posts only at the two endpoints. If I turn off the railing association, I can delete the extra post, but I’d like to keep the two elements linked if I can.
David Collins

Win10 64bit Intel i7 6700 3.40 Ghz, 32 Gb RAM, GeForce RTX 3070
AC 27.0 (4001 INT FULL)
1 ACCEPTED SOLUTION

Accepted Solutions
Solution
Barry Kelly
Moderator
The stair has an option to end with a tread or end with a riser.
This does affect how an associated railing finishes at the end, especially if the railing does not carry onto the landing.

Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11

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Solution
Barry Kelly
Moderator
The stair has an option to end with a tread or end with a riser.
This does affect how an associated railing finishes at the end, especially if the railing does not carry onto the landing.

Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11
David Collins
Advocate
Thanks Barry, that fixed it. The logic escapes me, but I suppose it makes more sense with a standard stair and landing.
David Collins

Win10 64bit Intel i7 6700 3.40 Ghz, 32 Gb RAM, GeForce RTX 3070
AC 27.0 (4001 INT FULL)