OCR Text |
Show Eridges Should Ee Fainted. Recent investigations of the Illinois state highway department indicate that few highway steel bridges in that . state are painted after their final completion com-pletion and acceptance. Very serious corrosion results and is illustrated in a number of cases, says the Engineering En-gineering Record. A serious factor in the corrosion of iron and steel is the use of salt to clear the roadway ot snow and ice. This was com-idered at least partly responsible for the bad condition of truss members in a j bridge fifteen years pld. |