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To apply a uniform distributed load:

2. You will see the Add Distributed Load dialog. In this dialog:
2. in a multi-stage model, distributed loads can be staged by selecting the Stage Load check box, and entering a Factor for the load magnitude at each stage. If you do NOT stage the load on a multi-stage model, then the load will be applied with the same magnitude at all stages.
3. See below for details about the load magnitude, orientation and staging.

4. select [OK] in the dialog, and you will be prompted to select the boundary line segment(s) on which to apply the load. Remember you can select Excavation, External, Material or Stage boundary segments. (You cannot apply distributed loads on Joint or Structural boundaries).
5. When finished selecting, press Enter or right-click and select Done Selection, and the distributed load will be applied to all selected segment(s), as indicated by the display of red arrows and the magnitude.
6. Check the direction of the arrows and the magnitude, to make sure that this is the load you wished to apply. If there is a mistake, you can repeat the above steps to apply the correct load, or use the Edit Distributed Load option to change the load parameters.

A distributed load magnitude is generally entered as a positive value. The direction of load application is specified by selecting an appropriate Orientation method (see below) in the Add Distributed Load dialog. If you enter a negative load magnitude this will reverse the direction of the applied load.

The load orientation may be specified using one of the following options:

• Normal to Boundary – loads are applied normal to boundaries
• Vertical – loads are applied vertically (default = downward)
• Horizontal – loads are applied horizontally (default = to the right)
• Angle from Horizontal – specify an angle from the horizontal. Note that a POSITIVE angle is measured counter-clockwise from the positive X-axis direction.
• Angle to Boundary – specify an angle relative to the boundary on which the load is added.

Flip Angle 180 degrees

NOTE: after adding a load, the orientation may sometimes be opposite from the intended direction (i.e. 180 degrees off). If this occurs, you can use the Edit Distributed Load option to "flip" (i.e. reverse) the load orientation by 180 degrees, or enter "f" in the prompt window. See the Edit Distributed Load topic for information about editing distributed loads.