A new glass walkway fabricated and installed by Sheffield engineering firm Ekspan has opened at Tower Bridge.
Ekspan delivered the £1m project for Bridge House Estates and the City of London Corporation.
The scheme involved working 42 m above the Thames on a busy and constrained Grade I-listed heritage site.
The glass floor was unveiled on the bridge’s west walkway, with a second glass floor still under construction set to open on 1 December.
The elevated east and west walkways between the North and South Towers will each have six reinforced glass floor panels, each weighing 530 kg, installed within a carbon steel framework.
The panels measure 11 m by 1.8 m on each walkway and the original steel lattice structure has been preserved under the glass while installation work is carried out.
Ekspan senior project manager Robert Carter said: “This project, I have to say, is definitely up there in the top 10 for challenge, purely down to its location in the very heart of London’s thriving hub.
“This made planning logistics for deliveries and all works process deadlines critical to accommodate the movement of working and residential public, road access, pre-booked events at the Tower, environment noise pollution, and working at a height over water and the live carriageway.”
Head of Tower Bridge Christopher Earlie said: “The opening of Tower Bridge marked the dawn of a legendary feat of engineering, creating what is considered by many to be the most famous bridge in the world.
“120 years on we are extremely proud to unveil the new glass floor on the high-level walkways – another astonishing engineering accomplishment.”