JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. Resistance Factors/Strength Capacity Reduction Factors The default resistance factors, (LFD Art. 9.14) for Precast/Prestressed Girder are: For factory produced precast prestressed concrete members (Flexure Prestressed): 1.00 For shear: 0.90 and per (LFD Art. 8.16.1.2.2) For flexure: 0.90 Parent topic: AASHTO LFD