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2. List of ancient spiral stairs - Wikipedia

   en.wikipedia.org/wiki/List_of_ancient_spiral_stairs

   The spiral stair is a type of stairway which, due to its complex helical structure, has been introduced relatively late into architecture. Although the oldest example dates back to the 5th century BC, [ 1 ] it was only in the wake of the influential design of the Trajan's Column that this space-saving new type permanently caught hold in ancient ...

3. Stairs - Wikipedia

   en.wikipedia.org/wiki/Stairs

   A staircase or stairway is one or more flights of stairs leading from one floor to another, and includes landings, newel posts, handrails, balustrades, and additional parts. [4] In buildings, stairs is a term applied to a complete flight of steps between two floors. A stair flight is a run of stairs or steps

4. Deck railing - Wikipedia

   en.wikipedia.org/wiki/Deck_railing

   The typical deck railing is generally built from pressure treated lumber. [14] Posts on a deck are also typically pressure treated wood and standard sizes are 4x4, 6x6, and 8x8. These posts give structural support to the railing assembly and are the most critical part for the safety of the guard rail assembly. [15]

5. Vessel (structure) - Wikipedia

   en.wikipedia.org/wiki/Vessel_(structure)

   Designed by Thomas Heatherwick, [3] Vessel has 154 flights, 2,500 steps, and 80 landings, [3] with the total length of the stairs exceeding 1 mile (1.6 km). [4] The copper-clad steps, arranged like a jungle gym [ 5 ] and modeled after Indian stepwells , [ 4 ] [ 6 ] can hold 1,000 people at a time. [ 3 ]

6. Rundetaarn - Wikipedia

   en.wikipedia.org/wiki/Rundetaarn

   Instead of stairs, a 7.5-turn spiral ramp forms the only access way to the towertop observatory as well as the Library Hall and the Bell-Ringer's Loft, both located above the church. The ramp turns 7.5 times around the hollow masonry core of the tower before reaching the observation deck and observatory at the top, on the way also affording ...

7. Glossary of architecture - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_architecture

   Either a small oval window, or an early type of window glass. Bulwark A Barricade of beams and soil used in 15th- and 16th-century fortifications designed to mount artillery. On board ships the term refers to the woodwork running round the ship above the level of the deck. Figuratively it means anything serving as a defence. Dutch loanword ...