# How to position a block at set intervals along an Alignment

**URL:** <https://forum.dynamobim.com/t/how-to-position-a-block-at-set-intervals-along-an-alignment/81927>\
**Category:** Civil 3D\
**Tags:** dynamo\
**Created:** [October 10, 2022, 2:56pm UTC](https://forum.dynamobim.com/t/how-to-position-a-block-at-set-intervals-along-an-alignment/81927 "2022-10-10T14:56:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![adam.coad3178](https://avatars.discourse-cdn.com/v4/letter/a/5f8ce5/32.png) [@adam.coad3178](https://forum.dynamobim.com/u/adam.coad3178)\
**Post date:** [October 10, 2022, 2:56pm UTC](https://forum.dynamobim.com/t/how-to-position-a-block-at-set-intervals-along-an-alignment/81927/1 "2022-10-10T14:56:30Z")

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Hey all,

I am new to using Dynamo and I am looking for advice. What I am looking to do is, to use a fence post with a block foundation which would be a CAD block. And position it every 2 or 3m along an alignment.

I have had a go at trying to create a graph but I am not sure what you need to include.

Thanks

Adam

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**Author:** ![mzjensen](https://avatars.discourse-cdn.com/v4/letter/m/b77776/32.png) [@mzjensen](https://forum.dynamobim.com/u/mzjensen)\
**Post date:** [October 10, 2022, 4:16pm UTC](https://forum.dynamobim.com/t/how-to-position-a-block-at-set-intervals-along-an-alignment/81927/2 "2022-10-10T16:16:55Z")

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Hi @adam.coad3178,

First, select the appropriate alignment that you want to work with. Some nodes to help with that are _Select Object_, _Alignments_, or _Selection.AlignmentByName_.

Next, generate coordinate systems along the alignment at whatever stations you need. The node to use for that is _Alignment.CoordinateSystemByStationOffset_.

Finally, create block references using the _BlockReference.ByCoordinateSystem_ node.

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<div class="post-metadata">

**Author:** ![adam.coad3178](https://avatars.discourse-cdn.com/v4/letter/a/5f8ce5/32.png) [@adam.coad3178](https://forum.dynamobim.com/u/adam.coad3178)\
**Post date:** [October 11, 2022, 7:12am UTC](https://forum.dynamobim.com/t/how-to-position-a-block-at-set-intervals-along-an-alignment/81927/3 "2022-10-11T07:12:45Z")

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Thanks for the advice. I will give this a go.