Following a small fire within a fast food operation at Central Station, Sydney Trains engaged Rapid to deliver urgent engineering investigations followed by emergency structural support. Our engineering investigation found that the integrity of the almost 100 year old floor slab, of clinker-rich concrete over jack arch construction using steel beams and hollow clay pot terracotta lumber, had been severely compromised due to the corrosive ingress of moisture and cleaning products over many years. Rapid then worked with Sydney Trains to design and implement a detailed, technical remedial solution and prevent further deterioration of the State Heritage register listed asset. Damaged areas of the slab were removed to facilitate access to the corroded beams which were sand-blasted back to clean metal and then protected with a zinc-rich primer. Extensive additional reinforcing was then integrated into the exposed jack arch construction. Rapid worked closely with Heritage Architects and Officers from Sydney Trains, City of Sydney Council and the NSW Office of Environment and Heritage throughout the works to document all aspects of the jack arch structure. The formerly affected section was isolated from the remainder of the ground floor slab and 40MPa concrete at 200 slump was then pumped in. Following a full cure Rapid then delivered water-proofing, fire-rated risers between floors and finally complete new wall and floor tiling. Our extensive knowledge of Central Station and our Heritage skills were crucial in facilitating our successful coordination of the works and cooperation with Sydney Trains as they worked towards the grand reopening of the new flagship Dining Hall precinct.