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dian football field is 150 yards (137 m) long and 65 yards (59 m) wide, within which the goal areas are 20 yards (18 m) deep, and the goal lines are 110 yards (101 m) apart. Weighted pylons are placed on the inside corner of the intersections of the goal lines and end lines. Including the endzones, the total area of the field is 87,750 square feet (8,152 m2). At each goal line is a set of 40-foot-high (12 m) goalposts, which consist of two uprights joined by an 18 1⁄2-foot-long (5.6 m) crossbar which is 10 feet (3 m) above the goal line. The goalposts may be H-shaped (both posts fixed in the ground) although in the higher-calibre competitions the tuning-fork design (supported by a single curved post behind the goal line, so that each post starts 10 feet (3 m) above the ground) is preferred. The sides of the field are marked by white sidelines, the goal line is marked in white or yellow, and white lines are drawn laterally across the field every 5 yards (4.6 m) from the goal line. These lateral lines are called "yard lines" and often marked with the distance in yards from and an arrow pointed toward the nearest goal line. In previous decades, arrows were not used and every yard line (in both multiples of 5 and 10) was usually marked with the distance to the goal line, including the goal line itself which was marked with either a "0" or "00"; in most stadiums today, only the yard markers in multiples of 10 are marked with numbers, with the goal line sometimes being marked with a "G". The centre (55-yard) line usually is marked with a "C" (or, more rarely, with a "55"). "Hash marks" are painted in white, parallel to the yardage lines, at 1 yard (0.9 m) intervals, 24 yards (21.9 m) from the sidelines. On fields that have a surrounding running track, such as Molson Stadium and many universities, the end zones are often cut off in the corners to accommodate the track. Until 1986, the end zones were 25 yards (23 m) deep, giving the field an overall length of 160 yards (150 m), and a correspondingly larger cutoff could be required at the corners. The first field to feature the shorter 20-yard endzones was Vancouver's BC Place (home of the BC Lions), which opened in 1983. This was particularly common among U.S.-based teams during the CFL's American expansion, where fe
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