Strata SE1 SE1 Londoners' fifth favourite tall building, behind 30 St Mary Axe (The Gherkin), The Shard, The Leadenhall Building (The Cheesegrater) and One Canada Square (Canary Wharf). Strata SE1 Strata SE1, nicknamed "Razor" or "Electric Razor", is a , 43-storey building at Elephant and Castle in the London Borough of Southwark in London. Designed by BFLS (formerly Hamiltons), it is one of the tallest residential buildings in London and more than 1,000 residents live in its 408 flats. Strata SE1 is located on the site of Castle House, an early 1960s six-storey office building, which was the first commercial premises at
30 St Mary Axe of the building during the summer and warm the building in the winter using passive solar heating. The shafts also allow sunlight to pass through the building, making the work environment more pleasing, and keeping the lighting costs down. The primary methods for controlling wind-excited sways are to increase the stiffness, or increase damping with tuned/active mass dampers. To a design by Arup, its fully triangulated perimeter structure makes the building rigid enough without any extra reinforcements. Despite its overall curved glass shape, there is only one piece of curved glass on the building, the lens-shaped cap at the apex.