Demolition of the B304 bridge over A99: Traffic experiences years of diversions!

Demolition of the B304 bridge over A99: Traffic experiences years of diversions!

In a large renovation, the bridge of the B304 is demolished and rebuilt over the A99. This reports Merkur . Construction is expected to begin in the winter of 2025/26 and are expected to take a total of three years. During this time, traffic is led over a temporary makeshift bridge. The costs for the comprehensive new building amount to around 30 million euros, which represents a decent investment.

The reason for this extensive renovation is the corrosion damage and flaking on the concrete of the existing bridge. Despite these defects, however, there is no acute danger to road users. In order to prevent falling concrete, a safety net under the bridge is stretched as a precaution. Preparations for the new building are expected to start in October 2025, with deforestation and the laying of supply lines on the agenda.

effects on traffic and residents

The construction of the makeshift bridge can be expected from mid -2026, while the existing bridge is to be demolished in autumn 2026. This means that the A99 is probably completely blocked at night during the demolition. The planned work certainly results in some disabilities for residents and commuters, since the entire construction processes will last until 2028. The bike path along the B304, which is blocked during the construction work, will be particularly affected.

In order to ensure the long lifespan of bridge structures, effective corrosion protection is indispensable. According to the Federal Institute for Streets , around 4,200 steel and steel association bridges are in operation in Germany, the total area of ​​which is over 6 million square meters. The corrosion -protected structures not only ensure the longevity of the bridges, but also actively help to minimize the maintenance costs.

innovations in corrosion protection

Modern corrosion protection systems must meet the highest requirements today. For example, the 2K epoxide systems that offer both corrosion and fire protection are innovative. According to Sherwin-Williams, these systems have been practical for over ten years and have enabled a protective duration of over 50 years, Everything with a layer thickness of only 400 µm. These technologies are crucial because steel bridges often need several renovations within their lifespan.