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[8]: 3–18 [18]: 101 The stairs had 898 steps until 1958, consisting of 18 risers in each of the 49 main stairs plus 16 risers in the spiral stair. [ 27 ] : chp 7 [ 123 ] : 18 Since 1958 the stairs have had 897 risers if only one spiral stair is counted because both spiral stairs now have 15 risers each.
The Monadnock was commissioned by Boston real estate developers Peter and Shepherd Brooks in the building boom following the Depression of 1873–79. [5] The Brooks family, which had amassed a fortune in the shipping insurance business and had been investing in Chicago real estate since 1863, had retained Chicago property manager Owen F. Aldis to manage the construction of the seven-story ...
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 ...
To avoid confusion, the number of steps in a set of stairs is always the number of risers, not the number of treads. The total run or total going of the stairs is the horizontal distance from the first riser to the last riser. It is often not simply the sum of the individual tread lengths due to the nosing overlapping between treads.
The tube-frame design required 40 percent less structural steel than conventional building designs. [97] The buildings used high-strength, load-bearing perimeter steel columns which acted as Vierendeel trusses. [98] [93] Although the columns themselves were lightweight, they were spaced closely together, forming a strong, rigid wall structure.
The set of large ornate staircases in the first-class section of the Titanic and RMS Olympic, sometimes collectively referred to as the Grand Staircase, is one of the most recognizable features of the British transatlantic ocean liner which sank on her maiden voyage in 1912 after a collision with an iceberg.
(The stairs are sometimes incorrectly called the "La Mesa stairs"--La Mesa Drive is elsewhere in Santa Monica, and there is a La Mesa Stairway in the city of La Mesa in San Diego County.) Public transit access to the Santa Monica Canyon stairs is available via Metro Los Angeles bus 534 and Santa Monica Big Blue Bus line 9. [1]
The longest spiral stair belonged to the 2nd century AD Trajan's Column in Rome. Measuring a height of 29.68 m, it surpassed its successor, the Column of Marcus Aurelius, by a mere 6 cm. Its treads were carved out ouf nineteen massive marble blocks so that each drum comprised a half-turn of seven steps.
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