If you are performing a dynamic analysis using Multiframe4D, you may wish to add additional masses to the structure to simulate the effects of equipment or construction loading which will affect the inertia of the frame.   The Joint Mass command from the Frame menu allows you to add these additional masses at joints in the structure.

To add a mass at a joint or joints

§    Select the joint or joints

§    Choose Joint Mass  from the Frame menu

§    Enter the mass values to be associated with each global direction of movement

If you have already added masses that you wish to remove, you can click the Delete Joint Masses radio button to remove Joint Masses from the selected joints.