# Boundary conditions for Cantilever Beam Model in 3D

**URL:** <https://community.freefem.org/t/boundary-conditions-for-cantilever-beam-model-in-3d/454>\
**Category:** General Discussion\
**Created:** [June 3, 2020, 12:29pm UTC](https://community.freefem.org/t/boundary-conditions-for-cantilever-beam-model-in-3d/454 "2020-06-03T12:29:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pdapte1999](https://avatars.discourse-cdn.com/v4/letter/p/d9b06d/32.png) [@pdapte1999](https://community.freefem.org/u/pdapte1999)\
**Post date:** [June 3, 2020, 12:29pm UTC](https://community.freefem.org/t/boundary-conditions-for-cantilever-beam-model-in-3d/454/1 "2020-06-03T12:29:31Z")

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Dear all,

The documentation has an example of beam3d. Can anyone help me to model a cantilever beam in 3D which has slope as zero at the fixed end?

Thanks

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**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\
**Post date:** [June 3, 2020, 1:49pm UTC](https://community.freefem.org/t/boundary-conditions-for-cantilever-beam-model-in-3d/454/2 "2020-06-03T13:49:44Z")

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What do you don’t understand in the example?

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**Author:** ![pdapte1999](https://avatars.discourse-cdn.com/v4/letter/p/d9b06d/32.png) [@pdapte1999](https://community.freefem.org/u/pdapte1999)\
**Post date:** [June 3, 2020, 4:44pm UTC](https://community.freefem.org/t/boundary-conditions-for-cantilever-beam-model-in-3d/454/3 "2020-06-03T16:44:42Z")

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Thanks for the assistance, but I have made it. The Euler Bernoulli beam equation works for beam elements, but in 3D over here we have used tetrahedral elements which do not require the slope boundary condition which is otherwise required in the earlier formulation.

Thanks once again.