Анакондская дымовая труба: Самая высокая кирпичная конструкция в мире.

Brick chimney in Montana, United States

The Anaconda Smelter Stack is the tallest surviving masonry structure in the world, with an overall height of about , including a brick chimney tall and the downhill side of a concrete foundation tall. Only the brick chimney is masonry, not the concrete foundation, because "masonry" must be made of many individual brick, stone, or concrete units, not one continuous mass. It is a brick smoke stack or chimney, built in 1918 as part of the Washoe Smelter of the Anaconda Copper Mining Company (ACM) at Anaconda, Montana, in the United States. A terra cotta coating covered the entire brick chimney when new, but by the time the smelter closed in 1981, most had eroded away except for the upper 40%, exposing most of its bricks and reinforcing rods. The inside diameter at the bottom of the brick chimney is while that at the top is about The stack and its viewing area are now the two part Anaconda Smoke Stack State Park.

The overall height of the stack is (≈ 585 feet),≈ means "usually rounded to". Dimensions not so marked are not usually mentioned or rounded. including a brick chimney (≈ 555 feet) tall and the downhill side of a concrete foundation high. This was the height when new in 1918, but loss of the terra cotta that covered the top course of bricks since then reduced its height one or more inches. The lowest of the brick chimney is an octagon, the vertices of which point to the cardinal and intercardinal directions, north, northeast, east, etc., while its sides face the secondary intercardinal directions, north northeast, east northeast, etc. Two large vertical openings are in the octagonal portion, each , on its east southeast and south southwest sides. When operational, the main flue carried hot exhaust gases to these openings and then into the stack from the smelter which was on the north side of the hill upon which the stack rests. The base of the octagon was (≈ 86 feet) side to side across its bottom before the loss of its terra cotta covering. But the inner surface of the octagon is circular with an inside diameter of (≈ 75 feet) across its bottom. The wall thickness of the octagon at its bottom ranges from at the center of a side to at each vertex. The rest of the chimney is a slightly tapering cylinder with a top inside diameter of (≈ 60 feet) and a wall thickness of (≈ 2 feet) just below a slightly flared top. Two newspaper sources give different numbers of bricks, 2,464,672 both of which are probably corruptions of the 2,464,652 number on a plaque in the state park. Most are radial bricks that are curved to match a sector of a cylindrical wall. The brick chimney weighs efn ua |The engineering source Much of the ore the smelter processed after 1955 came from the Berkeley Pit just north of Butte, Montana. At the time it was built, the stack was the tallest masonry, brickwork structure and chimney of any kind in the world and it remains the world's tallest surviving masonry structure. Taller masonry chimneys have existed but have since been demolished. Taller chimneys that still exist are made of reinforced concrete. See List of tallest chimneys. The Washington Monument would fit inside the stack's brick portion except for their lowest where an overlap of as much as at each corner of the monument would occur. The stack's brick portion is about taller than the monument's 2015 height. The masonry portion of the stack is about taller than the above ground portion of the monument's masonry, which disregards the monument's aluminum apex.

The Washoe Smelter was demolished after its closure in 1981. The stack alone, however, remains standing because the citizens of Anaconda organized to "Save the Stack." It is commonly referred to as "The Stack" or "The Big Stack" and is a well known landmark in western Montana. In 1986 it was designated the Anaconda Smoke Stack State Park. constructed in 2000 just east of the town of Anaconda and the smoke stack about 1.2 mile (2 km) southeast of the viewing area. Although the site of the smelter underwent some environmental cleanup, the general public is not allowed access to the stack itself because the soil around it is still hazardous due to contamination by the toxic metalloid arsenic as well as copper, cadmium, lead and zinc. Terra cotta covered the entire surface of the chimney just as it covered its top; by the time of its closure, the bottom 60% had eroded, including the brick octagon, exposing its bricks and reinforcing rods. The terra cotta is now darker than the exposed bricks.