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In 1961, the ASTM International Standards Organization adopted E90-61T, which served as the basis for the STC method used today. The STC standard curve is based on European studies of multi-family residential construction, and closely resembles the sound isolation performance of a 9-inch-thick (230 mm) brick wall. [10]
In England, the length and width of the common brick remained fairly constant from 1625 when the size was regulated by statute at 9 x 4 + 1 ⁄ 2 x 3 inches [45] (but see brick tax), but the depth has varied from about two inches (51 mm) or smaller in earlier times to about 2 + 1 ⁄ 2 inches (64 mm) more recently.
A standard 8-inch CMU block is exactly equal to three courses of brick. [3] A bond (or bonding) pattern) is the arrangement of several courses of brickwork. [2] The corners of a masonry wall are built first, then the spaces between them are filled by the remaining courses. [4]
A leaf is as thick as the width of one brick, but a wall is said to be one brick thick if it as wide as the length of a brick. Accordingly, a single-leaf wall is a half brick thickness; a wall with the simplest possible masonry transverse bond [definition needed] is said to be one brick thick, and so on. [21]
Clinker brick closeup of bricks in the so-called Clinker building on Barrow street in Greenwich Village, New York City. Clinker is sometimes spelled "klinker" which is the contemporary Dutch word for the brick. Both terms are onomatopoeic, derived from the Middle Dutch klinkaerd, later klinker, from klinken (“to ring, resound”).
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The sound reduction index is used to measure the level of sound insulation provided by a structure such as a wall, window, door, or ventilator. It is defined in the series of international standards ISO 16283 (parts 1-3) and the older ISO 140 (parts 1-14), or the regional or national variants on these standards.
Avoid these sleep threats by keeping your bedroom space orderly, especially the areas close to your bed…meaning it’s probably time to take action again that disheveled stack of books that has ...