The wall of the building forms part of the perimeter wall of the Showgrounds. Internally, the building is one large open space with the saw-tooth roof supported by steel trusses on I-section columns. Twelve sets of large skylights run at 45 degrees across the space providing natural light. The ceiling is lined with sheet material and the floor is bitumen. The building is mechanically ventilated. 10. Gregory Terrace Entry Building () The Gregory Terrace Entry Building is a two-storey timber building with a brick extension, which forms part of the perimeter wall of the Showgrounds. The timber building has a gabled-hipped roof clad with corrugated metal sheet. It has undergone changes, in particular at the ground floor level, which is now used as a space to park cars. The northwest external wall has been removed and replaced with three steel posts. The area in which the cars are parked has a pressed metal ceiling. At the first floor level the northwest veranda has been enclosed and extended and the roofline has been altered. The first level contained one large room, which has been subdivided with partitions. This room has six sets of French doors, which open onto the enclosed veranda and six windows on the Gregory Terrace elevation. The room retains its pressed metal ceiling and fittings such as a row of coat hooks. At the northeast end of the building is a two-storey cream brick annexe (erected 1971), which is used by the police during the period of the Ekka. The building has a flat roof, with a large fascia and aluminium window frames. Other buildings in Area 2 include: 11. RNA Administration Building () – a two-storey building constructed with a concrete frame and brick and sheet material infill panels. The building is designed as a series of vertical elements with a continuous band of windows at each level and a large projecting fascia concealing the roof. Internally the building contains offices. 12. RNA Function Room – a single-storey brick building with a flat roof. On the eastern & southern elevations there are full-length glass windows, mosaic tiles on the columns and a deep fascia concealing the roof. Internally the building is one large room with attached kitchen facilities. Area 3 This encompasses the area to the west of the railway which traverses the Showgrounds. The principal elements of cultural heritage significance in Area 3 include: 13. Show