| Applies To | |
| Product(s): | AutoPIPE |
| Version(s): | ALL; |
| Area: | Warning |
| Date Logged & Current Version |
Aug 2026 26.00.00.306 |
Problem:
The following is displayed when using AutoPIPE
* * * W A R N I N G - MODEL * * *
W2261-14: Following ASCE Static Earthquake cases have value of "Component Response Modification Factor (Rp)" set to a value other than 3.5. Please modify to a valid value for current 6 piping design code.
E1
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Why and How to avoid it?
Solution:
Users may receive this warning even when entering valid ASCE 7-16 Table 13.6-1 values such as Rp = 6.0 or Rp = 12.0.
Cause:
The warning occurs because AutoPIPE's implementation of ASCE 7 seismic calculations used with ASME B31E piping code checks limits the Component Response Modification Factor (Rp) to a maximum value of 3.5.
Although ASCE 7-16 Table 13.6-1 permits higher Rp values for certain nonstructural components, ASME B31E restricts the value of Rp used in piping seismic stress calculations to 3.5.
When a value greater than 3.5 is specified:
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- AutoPIPE automatically uses Rp = 3.5 in the calculations.
- The entered value is not used for the seismic stress evaluation.
- Warning W2261-14 is generated to notify the user that the specified Rp value is not valid for the selected piping design code.
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Explanation:
The Seismic B31E option in AutoPIPE is used to define seismic load cases that are combined and evaluated according to ASME B31.1, ASME B31.3, ASME B31.4 and ASME B31.8 2008 and later editions.