Royal Sun Alliance
A concrete structure, with a shear core surrounding the lifts and a moment resisting perimeter frame, was selected to minimise wind induced building vibration and to satisfy other structural and architectural design objectives.

Extensive use was made of precast concrete including prestressed floor units, cantilever floor slabs, and beams complete with precast beam / column joint zones, to speed up construction and to simplify the work on site. Precast concrete enabled time and cost objectives to be met and ensured a high quality structure.

Transparent mock-ups of beam / column joints were made and test grouted off site to establish the feasibility and quality of grouted connections