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I am modeling bridges and want to use a curve to shape them. However I only want the vertices to move along a single axis (like Z).

bridge

With the Curve Modifier, the panels don't hang straight downwards.

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  • Create a constant-offset array of a single mesh edge, crossways to the bridge-curve..
  • Set the arrayed edge's duplication to Dupliverts
  • Parent the vertical elements to the array of edges?

enter image description here

This might not suit .. there are other options, particles on placeholder planes, parenting with constraints..

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    $\begingroup$ It's a shame DupliFrames have gone.. they might have been a 'hack', but they were very handy for this sort of thing... $\endgroup$
    – Robin Betts
    Commented Jun 30, 2019 at 20:06

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