UFC 4-023-03
25 January 2005
Figure 2-3 Design Process for MLOP and HLOP in New and Existing Construction
Medium Level of Protection
High Level of Protection
Additional Ductility
Requirement
Tie Force
Alternate Path
Requirement
Requirement
Check Ductility of
Apply Alternate Path
Check Horizontal Tie Forces
Perimeter Load
Method for Removal of
Bearing Elements
Elements as Specified
in Section 3-2.3. Use
Re-Design
MLOP and HLOP
No
All Pass?
or Retrofit
Deformation Limits.
No
Deficient
Re-Design
Re-Design
All
Members
or Retrofit
or Retrofit
Pass?
Yes
Structure
Deficient
Members
Damage Limits
Yes
Satisfied for Each
Check Vertical Tie Forces
No
Removal Case?
Re-Design or
Additional
Retrofit
Ductility
Yes
Deficient
Rqm't Met
Members
Peer
Fail
Review
OR
All Pass?
No
Pass
AP Rqm't
Apply Alternate Path Method
Met
for Removal of Each
Yes
Deficient Member, One at a
Time. Use MLOP and HLOP
Deformation Limits.
Re-Design or
Retrofit Structure
Damage Limits
Yes
Tie Force
No
Satisfied for Each
Rqm't Met
Removal Case?
2-6
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