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A major new shopping development and roof garden above Canary Wharf Crossrail Station has opened to the public last friday, ahead of the station opening in 2021. Stretching more than 300 metres along the north dock, the above ground scheme designed by Foster + Partners includes four levels of shops, cafes and restaurants, as well as extensive public gardens, which are densely planted with trees and plants, and interspersed with seating and pavilions – all partially enclosed by a timber lattice roof, which wraps around the building like a protective shell.
The gardens are accessible from ground level via two connecting bridges. The roof opens in the centre to draw in light and rain for natural irrigation, and opens along the sides and at either end to allow views of the water and surrounding streets. The spruce beams are sustainably sourced and provide a warm, natural counterpoint to the glass and steel towers of Canary Wharf. Between the beams there are air-filled plastic cushions. The partial enclosure of the space creates a comfortable environment for people to enjoy all year round, as well as providing a gentle microclimate for some of the plant species that first entered Britain through the docks.
The design of the lattice itself is a fusion of architecture and engineering. Remarkably, despite the smooth curve of the enclosure, there are only four curved timber beams in the whole structure. To seamlessly connect the straight beams, which rotate successively along the diagonals, the design team developed an innovative system of steel nodes, which resolve the twist. The visual simplicity of the smooth curving timber lattice belies the geometric complexity of the structure, which is made up of 1,418 beams and 564 nodes, 364 of which are unique.
Foster + Partners’ specialist modelling group helped to develop an innovative system to enable the roof components to be rapidly fabricated and accurately assembled on site. At night the structure is illuminated, creating a welcoming civic gateway to London’s growing commercial district.