Step 01
Linking an object to a dummy can be very usefull. For example if you want an 3D human model to open an door you need to link the biped’s hand to the door-handle. Linking a biped requires a different approach then a standard 3dsmax object. In this example we are creating a very basic scene with a biped object and a dummy object.

First create a biped by going to the systems panel > biped, and drag one out in your viewport. Also create a Dummy object. A dummy object is found in the Helpers tab. You can see the image below for reference.

Step 02
Select you biped’s hand and goto the motion panel. First expand the KeyInfo properties and next expand the IK properties. Click on “Select IK Object” and choose your dummy object. When you have selected the dummy object you need to set some properties for the IK-link

Download pdf Tutorial for 3dsmax : How to bind a biped’s hand to a dummy object