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Codes also generally require that there be a 1 + 1 ⁄ 2 inches (38 mm) clearance between the underside of the handrail and any obstruction—including the horizontal bracket arm. There is an allowance however for variations in the handrail size—for every 1 ⁄ 2 inch (13 mm) of additional perimeter dimension over 4 inches (102 mm), 1 ⁄ 8 ...
Depth is generally 2 to 6 cm (1 to 2.5 inches) and width 6 to 13 cm (2.5 to 5 inches). If the stairs do not turn and are relatively short, a flat cross section without sidewalls may suffice. The channel is an inclined plane within easy reach of someone using the stairs. There may be level portions for resting or passing.
It was originally two outdoor flights of granite-clad stairs and an escalator that connected Vesey Street to the World Trade Center's Austin J. Tobin Plaza. During the September 11, 2001, attacks , the stairs served as an escape route for hundreds of evacuees from 5 World Trade Center , a 9-floor building adjacent to the 110-story towers.
During this work some of the original windows and vents were bricked over, and the current bronze handrail on the outdoor steps added. A quarter-century later, in 1963, when the outdoor steps were replaced, the original lampposts were removed as well. There have been no other significant changes to the building other than those. [1]
In one project, Hartman says, her firm used low-level step lights to safely illuminate the walking path, gas lanterns for romance and nostalgia, and pendant lights in a tree for unexpected drama ...
With 12.2% of Americans struggling to walk or climb stairs, a stair lift can make a major difference in accessibility at home. Those who face mobility issues, such as seniors, people recovering ...
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