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The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.
Shepherd's crook A shepherd's crook. A shepherd's crook is a long and sturdy stick with a hook at one end, often with the point flared outwards, used by a shepherd to manage and sometimes catch sheep. In addition, the crook may aid in defending against attack by predators. When traversing rough terrain, a crook is an aid to balance.
A typical family tipi is a conical, portable structure with two adjustable smoke flaps, multiple poles (historically from 12 to 25 ft or 3.7 to 7.6 m long) called lodge poles. Lewis H. Morgan noted that tipi frames were 13 to 15 poles that were 4.6 to 5.5 metres (15–18 ft) tall. These poles, "after being tied together at the small ends, are ...
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The standard utility pole in the United States is about 35 ft (10 m) tall and is buried about 6 ft (2 m) in the ground. [5] In order to meet clearance regulations, poles can, however, reach heights of at least 120 feet (40 meters).
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The poles carry supply voltages from 240 to 275,000 volts and come in various sizes from 9–26 m (30–85 ft) in length, though studies indicate heights to 36 m (118 ft) are feasible. [6] The service life of a Stobie pole is predicted to be in excess of 80 years. It is now commonly regarded as a South Australian icon. [5] [7]
When visible, the stars could be used to measure the time at night. There were 10 stars for the 10 hours of the night; the day had a total of 24 hours including 12 hours for the day, 1 hour for sunset, and 1 hour for sunrise. Merkhets were used to replace sundials, which were useless during the dark. [152]