To add a selfweight load for surface elements so the
weight of the surface elements is included in the analysis of the structure,
use the following procedure.
-
Either:
The
Add New Load Items dialog opens.
-
Select the
tab.
-
Select a global
Direction for the selfweight.
This is typically the
vertical
direction but can be any global
direction.
-
Type a
Factor.
This is multiplier on the calculated weight of the
structure objects. You do not need to use a load factor for ultimate strength
design here, as that is typically applied to load combinations.
Note: A positive value
will act in the positive global direction, so you will typically use a negative
value here for gravity loads (-1 being the most commonly
used value).
-
Click
Add.
The load item is added to the selected load
case.
The
SSELFWT
command, along with direction and factor, are
added to the load case.
You must assign the load items to structure objects.