Abstract
Kentucky Transportation Center (KTC) personnel monitored the installation of load indicating washers (LIWs) on the US 60 bridge at Catlettsburg, KY during construction. On completion of the bridge, KTC personnel performed torque measurements on a number of LIW installations. LIWs previously installed on the Thirteenth Street Bridge over the Ohio River at Ashland, KY were also inspected.
The KTC construction inspections revealed no significant problems in installing LIWs. Workers were able to use them to determine proper bolt assembly installation. They also permitted inspectors to rapidly check for proper bolt tension. As with other bolt tensioning methods, LIWs had to be tested prior to installation.
The follow-up field torque tests indicated that the LIWs provided consistent bolt tension values.
The only potential service problem with LIWs, as discerned on the Thirteenth Street bridge, is related to corrosion. Uncoated LIWs must be hand painted to prevent rusting.
Report Date
10-1989
Report Number
KTC-89-55
Digital Object Identifier
http://dx.doi.org/10.13023/KTC.RR.1989.55
Repository Citation
Hopwood, Theodore II and Courtney, Edgar E., "Load Indicating Washers" (1989). Kentucky Transportation Center Research Report. 654.
https://uknowledge.uky.edu/ktc_researchreports/654
Notes
The contents of this report reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the University of Kentucky, the Kentucky Transportation Cabinet, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. The inclusion of manufacturer names and trade names are for identification purposes and are not to be considered endorsements.