Trainshed, St Pancras, London

St Pancras was planned by William Henry Barlow, the Midland Railway's consulting engineer.

The single-span elliptical overall roof was the largest such structure in the world at the time of its completion. Materials - wrought-iron framework of lattice design, glass covering the middle half and timber (inside)/slate (outside) covering the outer quarters. The two end screens were glazed in a vertical / rectangular grid pattern with decorative timber cladding around the edge and wrought iron finials around the outer edge. It was 679 feet (207 m) long, 236 feet (72 m) wide, and 98 feet (30 m) high at the apex above the rail tracks.

The roof was a collaboration between William Henry Barlow and Rowland Mason Ordish. It allowed the station to make maximum use of the space beneath without obstructions. A space for a fronting transverse hotel was included in the plan.