North elevation showing later glazed infill wall Photographer: William Martinson

Detail of north elevation Photographer: William Martinson

Underside of atrium roof Photographer: William Martinson

Detail of circular steel beam cut-outs Photographer: William Martinson

Detail of external columns, diagonal brackets and tension bars Photographer: William Martinson

Atrium eaves detail Photographer: William Martinson

Apex detail Photographer: William Martinson

Flush glazing on north facade with reflections Photographer: William Martinson

Detail of column bases, and connection to tension bars Photographer: William Martinson

Detail of external columns, diagonal brackets and tension bars Photographer: William Martinson