to heat loss, daylight, glare control and solar gain. Here, the facade is supplemented with an internal layer of doubleglazing, forming a cavity which incorporates the structural frame. The external glazing incorporates vents at node levels to allow outside air to enter and discharge from the cavity. Controlled blinds in the cavity automatically adjust to limit unwanted solar gain and glare.
Architects: Rogers Stirk Harbour + Partners Location: 122 Leadenhall Street, London EC3V 4QT, UK Photographs: Richard Bryant – Courtesy of British Land/Oxford Properties, Lee Mawdsley, Paul Raftery
The lower levels of the building are recessed on a raking diagonal to create a large public space that opens up to the south. The spectacular scale of the semi-enclosed, cathedral-like space is without precedent in London and will create a major new meeting place and a unique destination in itself. Overlooking the space are generous terrace areas within a bar and restaurant that provide animation and views into the public space and beyond. This enclosure is open at ground level to give access from all directions. The public space is fully accessible by means of a large, gently raked surface connecting St Helen’s Square with Leadenhall Street.
[Page ***] Issue 17 - Archetech