Evaluation and Repair of Wrought Iron and - Purdue e-Pubs ...

137iron bridges was also found. From this information a better understanding of the materialand structural properties of wrought iron was developed.Information and data were also collected from historical sources containingresults from tensile testing of wrought iron used for construction purposes during thenineteenth century. These sources included works from authors such as Kiraldy,Humber, and Beardslee. From these data it was found that the average tensile strength,yield strength, and percent elongation are 54,000 psi, 33,300 psi, 23.2%, respectively.These data were also compared to results found from experimental testing completed inthis study.Along with the literary search a survey was also prepared and distributed to StateDepartment of Transportations, State Local Technical Assistance Programs, IndianaCounty Engineers, and various engineering consultants to collect information on existingrepair and inspection procedures used for historic iron bridges. The results from thissurvey did not lead to any existing wrought iron bridge member repair procedures, but itdid lead to a better understanding of the need for more knowledge concerning thebehavior of historic wrought iron.6.1.2 Summary of Testing ResultsThe material testing completed in this research consisted of: micrographs,chemical analysis, hardness testing, tensile coupon testing, charpy impact testing, tensiletesting of eyebar end connections, and some limited fatigue testing.Specimens utilized in the testing for this study were machined from members oftwo different bridges, the Bell Ford Bridge in Jackson County, Indiana and the AdamsMill Covered Bridge in Carroll County, Indiana. The specimens from the Bell FordBridge were machined from eyebars that made up the bottom tension chord and were