The design of the stairs at the Samsung building necessitated a finite element analysis of a free spanning spiral staircase. In order to keep a thin profile and not have any intermediate supports, the curved balustrades act as deep beams and provide stiffness to the staircase.

A harmonic analysis was undertaken to ensure that vibrations and accelerations were within acceptable limits for a number of different loading scenarios.

The fixing into the existing concrete structure proved to be quite tricky as the stiffness gained from having semi-rigid supports was vital to the serviceability of the staircase.

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some photos and figures from the Samsung spiral stairs project.

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