RAM Structural System Help

Drift

A drift report for all the load cases can be displayed on screen for any point on the model. The Drift report will only include the load cases selected using the Select Cases button. The drift is only reported for locations within the diaphragm. For points outside the diaphragm or points on levels with no diaphragm, zero drift is always reported. In those cases, the report - Nodal Displacements can be used. To view a Drift Report for a point:

  • Select Process > Results > Drift > At a Point.
  • In the Select Plan dialog box that opens, Highlight Roof from the list box.
  • Click [OK].
  • This takes you back to the graphics screen. Click the cursor on any point on the floor plan to view drift for that point for all load cases.
  • This report starts with a listing of the load cases by name. Click the Forward arrow "►" to continue to the next page where the results begin. The report includes the total displacement as well as the inter-story displacement.
  • Click to exit the report.

Upon exiting the drift report, you are returned to the floor plan with the target cursor indicating that you are still in Results – Drift – At a Point mode. You can either continue investigating drift at other points or issue other commands.

A drift report for up to four predefined points, can also be displayed on screen. To Obtain a Drift Report at Control Points:

  • Select Process > Results > Drift > At Control Points.

The Drift at Control Points dialog box will appear on the screen:

  • In the row marked 1 type 0 for X and 0 for Y (you can use the arrow or tab keys to move from cell-to-cell.
  • In the second row type 125 (40) for X and 60 (18) for Y.
  • Click [View Results] to get the drift values at these two corners of the building.
  • Click to exit the report.