Strengthening of existing buildings: an introduction

Using concrete in a changing environment series - part 2 of 4.

This year the judges have introduced new judging criteria designed to ensure that the Structural Awards recognise and celebrate the immense skill structural engineers demonstrate across a vast range of structures.

22 Bishopsgate was erected on the site of an abandoned project, reusing 100% of the existing foundations from three previous buildings, and incorporating more than 50% of the basement built for its predecessor. This article describes the approach to reusing the existing foundations and basement, as well as the focus on material efficiency in designing the superstructure and transfer structures.