# Liner Coupling Springs in FLAC3D 9.0

**URL:** <https://forum.itascainternational.com/t/liner-coupling-springs-in-flac3d-9-0/873>\
**Category:** FLAC3D\
**Created:** [December 17, 2022, 8:16am UTC](https://forum.itascainternational.com/t/liner-coupling-springs-in-flac3d-9-0/873 "2022-12-17T08:16:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Xiang](https://avatars.discourse-cdn.com/v4/letter/x/9fc348/32.png) [@Xiang](https://forum.itascainternational.com/u/Xiang)\
**Post date:** [December 17, 2022, 8:16am UTC](https://forum.itascainternational.com/t/liner-coupling-springs-in-flac3d-9-0/873/1 "2022-12-17T08:16:01Z")

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Are these blow mentioned fish functions not avaiable in FLAC3D 9.0 no more? If true, how can I set these properties? I haven’t seen some similar fish functions in new documentation.

1. struct.liner.normal/shear.stiffness…
2. struct.liner.shear.friction…
3. struct.liner.shear.cohesion…

Thank you for your replay

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**Author:** ![Moo](https://avatars.discourse-cdn.com/v4/letter/m/c4cdca/32.png) [@Moo](https://forum.itascainternational.com/u/Moo)\
**Post date:** [December 19, 2022, 2:02pm UTC](https://forum.itascainternational.com/t/liner-coupling-springs-in-flac3d-9-0/873/2 "2022-12-19T14:02:27Z")

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Xian:  
All structural properties can now be found in (for extample) struct.liner.prop – which uses the same syntax as zone.prop. See also struct.liner.prop.index.

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**Author:** ![Xiang](https://avatars.discourse-cdn.com/v4/letter/x/9fc348/32.png) [@Xiang](https://forum.itascainternational.com/u/Xiang)\
**Post date:** [December 21, 2022, 11:18am UTC](https://forum.itascainternational.com/t/liner-coupling-springs-in-flac3d-9-0/873/3 "2022-12-21T11:18:02Z")

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Thanks Moo, it works