Structurally the building is a hybrid, with structural steelwork forming the initial 40 floors with a concrete frame then extending up to level 69. Above this it reverts back to steel with the top 23 floors, known as the Spire, now being erected.
In order to make the erection of the final steel element as efficient as possible, the entire Spire was previously trial erected (right) at steelwork contractor Severfield-Reeve’s Dalton facility in North Yorkshire.
All of the Spire’s steelwork is being delivered to site in pre-assembled modules which is reducing the amount of work at height. The modules are all transportable sized pieces measuring up to 3m × 7m for horizontals and 3m × 7.8m for vertical sections.