Precast concrete
An open structure, the car park consists primarily of a grid of rectangular concrete columns with flared tops supporting waffle slabs which form the floors. Precast concrete panels with an exposed aggregate finish form the balustrades on the Turbot Street and Wickham Terrace elevations. Balustrading elsewhere consists of painted square sectioned steel posts attached to the outside face of the building which support steel pipe handrails. Horizontal steel rods secured with steel springs have been added as supplementary balustrading. The original security screen on the Wickham Terrace elevation is a series of vertical steel rods fixed to the floor slabs with springs.