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Situated in the heart of London’s “Tech City”, the Atlas is a landmark mixed-use scheme at 145 City Road. 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 around 300 apartments and a 10-storey office building. We accessed the site via a pit lane on a TfL red route and utilised complex engineering methods along with excellent post tensioned (PT) design, involving a bonded flat duct system and PT floor slabs that complied with the deflection limits of the cladding system.
Structures
Value Engineering
02
Early engagement during the PCSA period on the Atlas improved the design and buildability of the balconies, accommodating cladding loads in line with PT slabs and thermal performance. We also provided a range of solutions in relation to the support for the building which was complicated by railway tunnels running north and south under the eastern edge.
A Highly Engineered Tower
03
High speed lifts require highly vertical towers. We worked closely with WSP to achieve the verticality of the build by constructing it 250 mm 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 jumpform system which allowed for accurate monitoring of the as-built position and for corrections to be made as the foundations settled over the tunnels.
Screen Protection
04
The stepped wafer design posed several challenges at the top of the structure, particularly when it came to positioning screen protection. 3D modelling helped us better understand our requirements to communicate to the site team.
05
06
click to open
A Highly Engineered Tower
03
High speed lifts require highly vertical towers. We worked closely with WSP to achieve the verticality of the build by constructing it 250 mm 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 jumpform system which allowed for accurate monitoring of the as-built position and for corrections to be made as the foundations settled over the tunnels.
Screen Protection
04
The stepped wafer design posed several challenges at the top of the structure, particularly when it came to positioning screen protection. 3D modelling helped us better understand our requirements to communicate to the site team.
05
06
07
07
click to open
A Highly Engineered Tower
03
High speed lifts require highly vertical towers. We worked closely with WSP to achieve the verticality of the build by constructing it 250 mm 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 jumpform system which allowed for accurate monitoring of the as-built position and for corrections to be made as the foundations settled over the tunnels.
Screen Protection
04
The stepped wafer design posed several challenges at the top of the structure, particularly when it came to positioning screen protection. 3D modelling helped us better understand our requirements to communicate to the site team.
05
06
07
08
06
06
click to open
A Highly Engineered Tower
03
High speed lifts require highly vertical towers. We worked closely with WSP to achieve the verticality of the build by constructing it 250 mm 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 jumpform system which allowed for accurate monitoring of the as-built position and for corrections to be made as the foundations settled over the tunnels.
Screen Protection
04
The stepped wafer design posed several challenges at the top of the structure, particularly when it came to positioning screen protection. 3D modelling helped us better understand our requirements to communicate to the site team.
05
06
07
08
09
10
A Highly Engineered Tower
03
High speed lifts require highly vertical towers. We worked closely with WSP to achieve the verticality of the build by constructing it 250 mm 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 jumpform system which allowed for accurate monitoring of the as-built position and for corrections to be made as the foundations settled over the tunnels.
Screen Protection
04
The stepped wafer design posed several challenges at the top of the structure, particularly when it came to positioning screen protection. 3D modelling helped us better understand our requirements to communicate to the site team.
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