Abstract: The mobile storage rack includes a storage rack frame for moving on ground rails, wheels carried by the bottom frame for engaging the ground rails and allowing displacement of the storage rack along the rails, and shelves carried by the frame for supporting articles. The storage rack has a braking apparatus including a unitary braking shaft made of a single shaft segment, a support structure rotatably carrying the braking shaft in cantilevered fashion, the support structure being attached to the storage rack frame, a braking shaft link carried by the braking shaft away from the support structure along the braking shaft, the braking shaft link linking the braking shaft to the storage rack wheels, a triggerable brake actuator that acts on the unitary braking shaft to stop the rotation of the braking shaft when triggered, and a dampener located between the braking actuator and the unitary braking shaft.