| 11. | The two small spiral stairs installed in 1958 are aluminum.
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| 12. | Developments in manufacturing and design have led to the introduction of kit form spiral stairs.
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| 13. | The rear verandah and viewing platform was enclosed and roofed and the spiral stair removed.
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| 14. | She handed Samantha to Dorothy Davenport, her nanny, and lead Wright to the spiral stairs.
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| 15. | A fourth smaller-diameter shaft accommodated an emergency spiral stair.
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| 16. | Spiral stairs mount to a platform from which visitors can gaze into the kidney-shaped bowl.
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| 17. | The lower floor was a chapel, with a spiral stair leading up to the library.
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| 18. | The paired spiral stairs were unique to this area but not extraordinary in Palladio s designs.
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| 19. | There is an entrance and a new spiral stairs to the tower in the west wall.
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| 20. | To maintain headroom some spiral stairs have very high rises to support a very short diameter.
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