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As for thickness, 5.5 cm (2.2 in) is average for Kyōma tatami, while 6.0 cm (2.4 in) is the norm for Edoma tatami. [6] A half mat is called a hanjō (半畳), and a mat of three-quarter length is called a daimedatami (大目畳 or 台目畳), which is used in tea-ceremony rooms . [4]
The board foot or board-foot is a unit of measurement for the volume of lumber in the United States and Canada. [1] It equals the volume of a board that is one foot (30.5 cm) in length, one foot in width, and one inch (2.54 cm) in thickness, or exactly 2.359 737 216 liters.
Fabric "weight" is often specified as mass per unit area, grams per square meter (gsm) or ounces per square yard. It is also sometimes specified in ounces per yard in a standard width for the particular cloth. One gram per square meter equals 0.0295 ounces per square yard; one ounce per square yard equals 33.9 grams per square meter.
Medium-density fibreboard (MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibre, often in a defibrator, combining it with wax and a resin binder, and forming it into panels by applying high temperature and pressure. [1] MDF is generally denser than plywood.
The unit was born out of the necessity to measure land surface to calculate taxes. At the time of Toyotomi Hideyoshi (16th century), the ken was about 1.97 m (6.5 ft), but around 1650 the Tokugawa shogunate reduced it to 1.818 m (5.96 ft) specifically to increase taxes. After the Edo period, the ken started to be called kyōma (京間). [1] [2]
The principal unit for measuring the floor space of an office or apartment is 坪 (Taiwanese Hokkien: pêⁿ, [1] Hakka: phiàng, Mandarin: píng). The unit is derives from the Japanese tsubo, the base unit of the Japanese area. The principal unit of land measure is 甲 (Taiwanese Hokkien: kah, Hakka: kap, Mandarin: jiǎ).
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