On the 14th of February, 2015, a huge fire broke out on Łazienkowski
Bridge; a five span bridge, 423 m long and 28 m wide, built in the years
1972-74. It was a fully steel structure with four plate girders and
orthotropic deck. The fire started under the first span during the
replacement of wooden service decks. The next day, the Department of
Bridges of the Warsaw University of Technology was designated to conduct
an expertise material investigation, geometrical verification, and FEM
model analysis. The subject of this paper concentrates on geometrical
issues. The main difficulty of this task was the lack of full reference
data regarding the bridge's original structure. The old design was
incomplete and there was no actual surveying results for the undamaged
structure. As a conclusion, some remarks focused on surveying
measurements and on the final decision regarding this bridge are given.
It was eventually exchanged into a brand new one and put into public use
on the 28th of October, 2015.