The openLAB is a 45 m long, three-span semi-integral research bridge near Bautzen, Germany, constructed from prestressed concrete girders. It serves as a benchmark platform for evaluating and comparing structural health monitoring (SHM) systems through controlled experiments. This paper presents the experimental setup, procedure, and selected results from load tests conducted in May 2025, focusing on static deformation up to the ultimate limit state (ULS) under a concentrated load of 400 kN, inducing a maximum deflection of 60 mm. The structural response was monitored using interdisciplinary methods – e.g., laser triangulation sensors (LTS), tilt sensors, robotic total station (RTS), unmanned aerial vehicle (UAV) photogrammetry, and fiber optic sensing – with strong agreement among the methods. Finite element (FE) models, developed to support test preparation, showed significant variability, highlighting sensitivity to modeling assumptions. All data – comprising FE models, environmental conditions, geodetic measurements, UAV photogrammetry, crack documentation, and fiber optic sensor readings – are openly accessible, providing a rich, multi-source dataset for future SHM research.