Eric Parry Architects has drop the height of its proposed 1 Undershaft skyscraper in the City of London to prevent it impinging on space allocated to London City Airport approach routes
The practice has submitted a revision to its plans, which the City of London Corporation is expected to consider some time before Christmas, to lower the height of the building by 4.66m to 304.94m above sea level.
This brings the building – still set to be the tallest in the Square Mile – to 10mm below the ‘approach surface’, above which development is considered risky for one of the airport’s runways.
A spokesperson for developer Aroland Holdings said: ‘Following extensive public consultation with local residents and key stakeholders, a slightly revised proposal for 1 Undershaft has been submitted.
‘Aroland Holdings look forward to a planning decision from the City of London in due course.’
An aviation study submitted alongside the original application last December showed that the 73-storey tower penetrated the approach surface by 4.65m.
However, the document pointed out that The Shard was approved despite being 5.05m above the safeguarding height.
In order to reduce the height of the building, Eric Parry has dropped the heights of each floor by 50mm and adjusted structural floor beam depths.
The soffit level above the ground has been reduced by 150mm and the overall double height of a proposed viewing gallery has also been lowered.
The reduction will not result in any changes to the depth, piling or foundation designs originally submitted.
The 90,000m² building will replace the Aviva Tower – formerly the Commercial Union building – a 118m-tall Miesian block by GMW dating from 1969.
Aroland said that it was still working with the Museum of London to explore the possibility of creating an educational space on the 71st and 72nd floors of the building.
The scheme is Eric Parry Architects’ first skyscraper project. The practice’s previous tallest scheme was the 19-storey 5 Aldermanbury Square scheme.
Eric Parry Architects’ proposals for 1 Undershaft - public consultation December 2015
Source: Anthony Coleman