The Leadenhall building opened in mid-2014 and is one of the most iconic buildings here in London. At 225 metres tall it currently sits as the 4th tallest building in London, however, this list seems to be changing on a daily basis! It’s known as ‘The Cheesegrater’ because of its sloped facade, we’ll get into why it’s sloped later.
Here at Yuanda, we’re extremely proud to have played a part in the Leadenhall Building. There were a number of engineering challenges that needed to be overcome on its facade, so today I sat down with Brian Quinn (Yuanda Engineer) to run through some of the complexities on this project.
Firstly, let’s take a look at the designers and the project team that came up with this unique design. The Leadenhall Building was designed by Rogers Stirk Harbour + Partners with to have unique facade angled at a slope of 10 degrees. The reason for this slope is rather unique. As part of a planning requirement in central London, there are specific sightlines that must be maintained. One such sightline is the view of the dome of St. Pauls Cathedral.
By tapering the building back it appears as though the building is leaning away from the dome of St. Pauls cathedral, thus, maintaining the sightline from Fleet Street (to the West).
This week we sat down with Brian Quinn from the Yuanda engineering department to dive into some of the details of this groundbreaking project.
I’ve been with Yuanda since 2011 and am now a Senior Engineer (Engineering Team Lead).
First and foremost, the sheer amount of exposed detail. We basically had to break the facade into 3 key parts:
Oh also, there were the lower levels around the entrance area surrounding the external escalators. This was comprised of a different system too.
Main façade (sloping) is a double skin façade – inner façade stands on the relevant floor, while the outer laminated glass façade is supported from steel hangers. The hangers span 7 floors if I recall correctly, with the mega hangers at the building corners.
The facades to the North Core (where you have the yellow steelwork) are very slim profiles, with special details including exposed brackets, elements with motorised louvres in the middle of glass panels.
Simply put it was a very unique facade. Truly one of a kind!
It was such a complex and unique project that they filmed an entire documentary on the construction process.
If you’re interested in seeing the construction process that was involved in making this, we’ve included an embedded full version of the construction documentary below. The Leadenhall building is an icon of modern engineering and we’re glad to have helped make it happen.