# FixZ command
This command is used to construct multiple homogeneous single-point boundary constraints for all nodes whose z-coordinate lies within a specified distance from a specified coordinate.
```tcl fixZ $zCoordinate (ndf $ConstrValues) <-tol $tol> ```
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z-coordinate of nodes to be constrained |
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ndf constraint values (0 or 1) corresponding to the ndf degrees-of-freedom. |
0 unconstrained (or free) |
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1 constrained (or fixed) |
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user-defined tolerance (optional, default = 1e-10) |
fixZ 0.0 1 1 1 1 1 1; # fully restrain all nodes in x-y plane at origin (z=0.0)
Code Developed by: fmk