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Ceilings are classified according to their appearance or construction. A cathedral ceiling is any tall ceiling area similar to those in a church. A dropped ceiling is one in which the finished surface is constructed anywhere from a few inches or centimeters to several feet or a few meters below the structure above it.
Trees have a theoretical maximum height of 130 m (430 ft), [166] but the tallest known specimen on earth is believed to be a coast redwood (Sequoia sempervirens) at Redwood National Park, California. It has been named Hyperion and is 115.85 m (380.1 ft) tall. [167] In 2006, it was reported to be 379.1 ft (115.5 m) tall. [168]
[4] [5] In some countries, such as Australia, New Zealand, Burma, India, Malaysia, and South Africa, breast height diameter has historically been measured at a height of 1.4 m (4 ft 7 in), but because of much active research into allometrics that are being applied to trees and forests, the convention of 1.3 m (4.3 ft) is more appropriate [6].
The silver maple tree is a relatively fast-growing deciduous tree, commonly reaching a height of 15–25 m (49–82 ft), exceptionally 35 m (115 ft). Its spread will generally be 11–15 m (36–49 ft) wide. A 10-year-old sapling will stand about 8 m (26 ft) tall.
Sapling size trees average 2 mm (3 ⁄ 32 in) per year in diameter growth, increasing to 3 mm (1 ⁄ 8 in) per year as poles and sawtimber. Second-growth trees show growth rates of 5 mm (3 ⁄ 16 in) per year. Shellbark hickory occasionally grows to a height of 40 m (130 ft) and a diameter of 100 centimetres (39 in).
Some smaller tree species, such as dogwood and holly, rarely grow tall and generally are understory trees. The canopy of a tropical forest is typically about 10 m (33 ft) thick, and intercepts around 95% of the sunlight. [ 1 ]
Even a facility built specifically for basketball players poses challenges to the 7-foot-6 center.
Some trees are tall and narrow, while others are low and broadly spreading. The data used to determine the average tree shape is derived from a tabulation of the largest trees of each of 192 different species in the NTS 2009 dataset. [38] The average girth, height, and crown spread values were calculated for the measurements included in the ...
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