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1. Define link properties through Define > Section Properties > Link/Support Properties.
   
   
   • Set the Link/Support Type to Gap (Figure 1).
   • Specify link properties under Directional Properties. Compression-only properties may be specified for each direction (Figure 1).

   • Set stiffness and open distance through Nonlinear > Modify/Show.
     
     
     

     Figure 1 - Set stiffness and open distance

2. Select the joint to which the link will be assigned, then model the link through Draw > Draw 1 Joint Link.

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