Special Maintenence to Control the Instability of Aging Bridges
1503 Words6 Pages
Construction of steel bridges in the 19th - 20th century mostly depended on the use of rivets for connection. Bridges got built at a much greater rate than any other steel or iron construction using rivets. Riveting was a better-proven and understood method of construction. They made a very strong connection when applied but were very prone to corrosion through rusting. Existing historic steel bridges are aging and experiencing increased levels of deterioration due to increased demand in vehicle weight and traffic volume. These bridges are increasing becoming weaker as the rivets used in their contact wear out leading to instability and unreliable due to the poor construction. Assessment of old bridges for maintenance purposes occurs regularly. These bridges have to undergo regular maintenance and reinforcements. This aids in strengthening them and ensuring that they offer adequate and reliable service to the general public.
Thousand of bridges across the USA carry, support and connect public roads. State Department Of Transportation (DOTs) and The Federal Highway Administration have in the recent past focused on improving the conditions of the Nations’ bridges through bridge inspection programs, the enhancement of the current asset management process and preservation strategies. According to the regulations provided within the National Bridge Inspection standards set up in 2004 sets that all public highway bridges in the USA located on public roads and are longer than