The Lexicon

London
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Story

Designed by world-renowned Skidmore Owings & Merrill (SOM), this striking canal side development, located moments from silicon roundabout, is 36 storeys high, making it Islington’s tallest building.

Part of the City Road Basin Masterplan, the Lexicon provides 307 apartments including a private residents’ spa and lounge, 785m² of mixed-use commercial space, and 52 basement car parking spaces.

We were appointed to deliver the substructure and superstructure for this landmark building. We also managed the piling subcontract for the bearing and perimeter piles, and the installation of the groundwater heating system.

36 storeys
h1

highlights

Substructure

Substructure works included the construction of a new, single level, waterproof basement car park and swimming pool and spa facility. Challenges were presented both by the site’s small footprint as well as its location on a former historic foundry with massive concrete obstructions below the basement. Great care was required during the demolition of the existing basement space.

Superstructure

The 36 storey lift and stair core was constructed using slipform rig because of the compact floorplates. Hydraulic protection screens were used to construct the ring of perimeter columns and the parallelogram-shaped floor plates.

Productivity

Floorplate slabs were constructed in two parts, one half cast to allow shuttering for the columns and walls to be erected, while on the other half, the floorplate falsework and reinforcement were installed prior to casting. The concrete had to achieve a fast setting rate to achieve the desired early age strength and changes were made to the mix design to enable the supporting floors to carry the next slab being cast on the accelerated programme. This method meant the floors were cast at rate of one every 6 days, allowing the programme to be completed several weeks ahead of schedule.

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Project
The Lexicon
Architect
Skidmore Owings & Merrill (SOM)
Engineer
WSP
Contractor
Mount Anvil
Sectors
Residential
Services
High rise
Superstructures
Substructures
Location
London
Status
Completed
Project summary
Project summary
Project
The Lexicon
Architect
Skidmore Owings & Merrill (SOM)
Engineer
WSP
Contractor
Mount Anvil
Sectors
Residential
Services
High rise
Superstructures
Substructures
Location
London
Status
Completed