| Product(s): | RAM Structural System; RAM Frame | ||
| Version(s): | Any | ||
| Environment: | N/A | ||
| Area: | Analysis | ||
| Original Author: | Bentley Technical Support Group |
Why do I get a warning about mass that's not associated with any diaphragm?
When you have line loads or any members with self weight masses considered (Under Ram Manager Criteria - Self-Weight) that occur outside of the boundary of the diaphragm slab edge you will get the following type of warning:
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Some mass has been detected on one or more stories that is not associated with any diaphragms.
It will be ignored in Analysis unless it is combined with one or more diaphragms.
See the Loads - Masses command.
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Under Loads - Masses you can evaluate the total diaphragm masses and you can combine these values with some diaphragm, override with User Specified Values or choose to ignore them by doing nothing.
One fairly common modeling mistake is to copy the line loads from another level type, but then modify the framing and slab edge without removing line loads that then fall out in space.
A similar error message also occurs when the Gravity load totals used for Notional loads are uncombined. See [[RAM SS Notional Loads]] for details.
See Also
RAM Frame - Seismic Loads [FAQ]
[[RAMSS Gravity Loads FAQ]]
[[RAM SS Notional Loads]]