Closure to 'Steel Girder Stability during Bridge Erection: AASHTO LRFD Check on Lib Ratios' by John S. Hastings,Qiuhong Zhao, and Edwin G. Burdette

摘要

The writers thank the discusser for his interest in the paper. The following responds to the issues and suggestions raised by the discusser: 1. It is suggested that the self-weight be increased to allow for impact particularly during shipping and lifting girders. 2. It is argued that the girder constraints during erection might be different from the AASHTO/load and resistance factor design (LRFD) formula, in which a beam is assumed to be laterally and torsionally restrained at its supports. However, the cables only provide a partial lateral and torsional restraint to a girder under lifting, and a girder supported at the pier is not fully braced against torsion.