how many stairs to the top of astoria column
Astoria Column The Astoria Column is a tower in the northwest United States, overlooking the mouth of the Columbia River on Coxcomb Hill in Astoria, Oregon. Built 92 years ago in 1926, the concrete and steel structure is part of a 30-acre (12 ha) city park. The 125-foot (38 m)-tall column has a 164-step spiral staircase ascending to an observation deck at the top and was added to the National Register of Historic Places on May 2, 1974.
Gateway Arch The structural load is supported by a stressed-skin design.[69] Each leg is embedded in 25,980 short tons (23,570 t) of concrete 44 feet (13 m) thick[58] and 60 feet (18 m) deep.[70] Twenty feet (6.1 m) of the foundation is in bedrock.[70] The arch is resistant to earthquakes[71] and is designed to sway up to 18 inches (46 cm) in either direction,[72] while withstanding winds up to 150 miles per hour (240 km/h).[73] The structure weighs 42,878 short tons (38,898 t), of which concrete composes 25,980 short tons (23,570 t); structural steel interior, 2,157 short tons (1,957 t); and the stainless steel panels that cover the exterior of the arch, 886 short tons (804 t).[61] This amount of stainless steel is the most used in any one project in history.[66][73] The base of each leg at ground level had to have an engineering tolerance of 1⁄64 inch (0.40 mm) or the two legs would not meet at the top.[7]