Thank you for the response. The existing steel bridge dates from 1910. I assume weldability could be determined from samples, but if it was not considered in the design it is unlikely to give suitable results.
I am considering repairs to a historic steel bridge. The bridge has corrosion to the beam flanges and stiffeners. How practical is it to weld new plate onto existing plate? Also what methods can be used to replace corroded rivets that are accessible from only one side?
