Background information
The bridge over Julianalaan was built around 1905 when the track plan for Haarlem station was laid out on a raised embankment. At the location of Julianalaan, with the waterway called Delft running parallel to it, a bridge with a clear span of approximately 19 meters was needed. Two abutments and a girder for each track proved sufficient. However, a new construction method for the girders was used for that time. Devised not long before by the Leuven chief engineer A. Vierendeel. The bridge is now over 120 years old but is holding up well. The underpass height is 3.60 meters. Sufficient around 1905, but nowadays a point of concern, especially for freight traffic.
Construction details
Thanks to the Vierendeel principle, cross-bracing in the girders is no longer necessary once the corners are sufficiently rigid. The inspection path along the girders somewhat obscures the view of this structural invention. The current inspection path, based on the construction, is not original, but is nevertheless still practical for maintenance personnel.
Vegetation, rails, and vehicles in the photos of the "Julianalaan" bridge are not included.
