The Atlas

London
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Story

The Atlas is a landmark mixed-use scheme at 145 City Road in the heart of “Tech City” in London. The building was designed to make the most of the site’s location and footprint, with an innovative wafer-like design elegantly tapered to maximise light passing into the residential areas.

The project comprised two concrete framed buildings – a 40 storey residential tower for some 300 apartments and a ten story (7500m2) office building.  We accessed the site via a pit lane on a TfL red route.

40 storey tower
10 storey office block
36956m2 of Post Tensioned floor slabs
3m deep basement raft slab
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highlights

Value Engineering

Early engagement during the PCSA period on the Atlas improved the design and buildability of the balconies to accommodate cladding loads in line with post tensioned slabs and thermal performance. We were also able to provide a range of solutions in relation to the support for the building which was complicated by railway tunnels running North South under the Eastern edge of the building.

A highly engineered tower

High speed lifts require highly vertical towers. We worked closely with WSP to achieve the verticality of the build by constructing it 250mm out of plumb, in smaller increments by floor, leaning the tower away from East Street so that it would settle back as required. The core was constructed using a Jump Form system which allowed for the accurate monitoring of the as-built position and for corrections to be made as the foundations settled over the tunnels

Post Tensioned floor slabs

Floor plates were traditionally built with PT designed in house. Kingscote Design provided the PT and the temporary work designs for both buildings. PT floor slabs were designed to comply with the deflection limits of the cladding system. The PT comprised a bonded flat duct system.

Screen Protection

The stepped wafer design posed several challenges at the top of the structure particularly in relation to the positioning of screen protection. We used 3D modelling to better understand our requirement and to communicate this to the sit team.

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Project
The Atlas
Architect
Engineer
Contractor
Sectors
Residential
Services
Design
Superstructures
High rise
Post Tensioning
Location
London
Status
Completed
Project summary
Project summary
Project
The Atlas
Architect
Engineer
Contractor
Sectors
Residential
Services
Design
Superstructures
High rise
Post Tensioning
Location
London
Status
Completed