Gerasimidis Group
Stability of Structures and Materials

Deteriorated Steel Bridges

​

According to the 2017 (FHWA) National Bridge Inventory (NBI) 47,619 of the United States 614,919 bridges (7.7%) are considered structurally deficient. A similar ratio is seen at local level in New England. In the Northern region of the country, corrosion of the superstructure is a leading factor behind structurally deficient bridge ratings.

​

Beam end corrosion appears because of leaking joints. Leaking water contains chemicals and salt due to de-icing procedures. Corrosion can frequently result in costly weight postings or maintenance or bridge closures. Cases have also been documented where excessive corrosion has led to the full rehabilitation of bridges.