The size of the standard plastic track and field plastic track and field track and field rules and drawing methods
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With the development of science and technology, plastic tracks appeared in the early 1960s. In the 1980s, the radius of the track and field track curves increased from 36 meters to 37.898 meters, and then developed to 36.50 meters. Experience shows that it is appropriate for most 400-meter semicircular runways to be built with curve radius between 35 and 38 meters. The IAAF proposes to build a runway with a radius of 36.50 meters as much as possible. The above three runways with different radii are all called "400-meter standard semicircular track and field field". Currently, the venues used for various track and field competitions held internationally and domestically are mostly tracks with the above radius.
Primary schools generally have 200
200 meters runway: the curve radius is 16.7 meters, the straight section is 46.8 meters long, and a total of 4 lanes, the smallest width of the lanes is 1.22 meters, the maximum is 1.25 meters, and the width of the lanes is 5 cm. All lanes should be the same.
Middle School is generally 400
It is known that the total length of the standard runway is 400 meters, which refers to the length of the innermost ring track. It is also known that the radius of the innermost ring is 36 meters, so you only need to first find the sum of the circumferences of the two semicircular curves of the innermost ring track, and then subtract the sum of the circumferences of the two curves with 400 meters to get the length of the straight. 400-3.14×36×2≈174
74÷2=87 meters
The full length of the fourth runway is obtained by the sum of the two semicircular bends of the fourth loop plus the sum of the two straights. The front side has already known that the length of the straight is: 87×2+2×3.14×(36+1.2×3) ≈423 meters
First 87×2+2×3.14×(36+1.2×0) =400
Second 87×2+2×3.14×(36+1.2×1) ≈408
Third 87×2+2×3.14×(36+1.2×2) =415
Fourth 87×2+2×3.14×(36+1.2×3) ≈423m
Fifth 87×2+2×3.14×(36+1.2×4) ≈430m
6th 87×2+2×3.14×(36+1.2×5) ≈438m
7th 87×2+2×3.14×(36+1.2×6) ≈445 meters
8 87×2+2×3.14×(36+1.2×7) ≈453 meters
Section 1 Standard semicircle track and field
1. Standard semicircle track and field
The International Athletics Federation Manual stipulates that the total length of the standard semicircle track and field
is 1. The standard semicircle track and field
The International Athletics Federation Manual stipulates that the total length of the standard semicircle track and field stadium is 400 meters, consisting of two straights and two curves. Currently, international and domestic track and field competitions usually use the following specifications of track and field.
(I) Inner protrusion along a track and field field with a radius of 36 meters
One lane is calculated as 36.30 meters, one lane is calculated as one lane and one bend is 114.04 meters long, and the two bends are calculated as 228.08 meters long. One straight section is 85.96 meters long, two straight sections are 171.92 meters long, and one branch and one circle calculates the length of the line to be 400 meters. Such as Beijing Workers' Stadium, Liaoning Anshan Stadium, Shanghai Hunan Stadium, etc.
(2) Inner protrusion along the track and field field with a designed radius of 37.898 meters
One lane computed radius is 38.198 meters, one lane computed radius is 120 meters, and two bends are calculated length is 240 meters. One straight section is 80 meters, two straight sections are 160 meters long, and one branch and one circle calculates the length of the line to be 400 meters. Such as Beijing National Olympic Sports Center Track and Field Field, Shenyang Sports Center Track and Field Field, South Korea Seoul Track and Field Field, etc.
(III) Inner protrusion along the track and field field with a designed radius of 36.50 meters
One lane is calculated radius of 36.80 meters, one lane and one bend is calculated length of 115.61 meters, and two bends are calculated length of 231.22 meters. One straight section is 84.39 meters, two straight sections are 168.78 meters in length, and one branch and one circle calculates the length of the line to be 400 meters. Such as Dalian Stadium, Guangzhou Olympic Track and Field Field, Changsha Helong Stadium, American Los Angeles Track and Field Field at the 23rd Olympic Games, etc.
(Four)Dimensional track width
Dimensional track width 9.76 meters to 10.00 meters (eight branches) or 7.32 meters to 7.50 meters (six branches). Each branch is 1.22~1.25 meters (including the right branch line), and the branch line is 5 cm wide, and all branch widths should be the same. In addition to the weeding track, the protruding edges made of suitable materials are bounded on the inner side of the track. The protruding edge is about 5 cm high and the minimum width is 5 cm; if it can be drained, the protruding edge can reach up to 6.5 cm, but it must not exceed; if there is no protruding edge, a 5 cm wide mark line must be drawn.
(V) Record-breaking runway
Rules stipulate that the radius of a record-breaking runway shall not exceed 50 meters. Unless the arc formed by a large radius of the two radii of the curved section of the site is formed, the curve at 180° shall not exceed 60°.
(Six) Inclination of the runway
The right and left inclination of the runway shall not exceed one percent (1:100), and the total inclination in the direction of running shall not exceed one thousandth (1:1000). The lateral inclination of the newly built track shall be inclined inward (low inside and high outside).
(7) Obstacle Race Track
Obstacle Running Pool section can be located on the inner side of the inner side of the runway (radius 36 meters, 36.50 meters) or the outer side of the runway (radius 37.898 meters, 36.50 meters). It is best to be located on the outer side of the runway, but it covers a large area.
(8) Longitudinal axis of the track and field field
The longitudinal axis of the track and field field (i.e., the center line) should be in the north-south direction and avoid the dominant wind direction. The angle with the meridian should not be greater than 5 to 10 degrees, and there should be a certain buffer area forward at the end point.
2. Basic structure of track and field sports field
A standard track and field field generally consists of three parts: outfield, midfield and infield.
Outdoor field: The space occupied by the outside of the track track. A large track and field sports field must be built in this part of the stand or other related facilities, and its size is determined based on the vacant land area and design requirements. For example, an off-field track and field field for teaching and training only occupies only a few meters, while a few dozen meters of space should be left around the standard track and field field.
Midfield: Space occupied by the track track. A standard track and field yard generally requires 8 to 10 lanes, each lane with a width of 1.22 meters to 1.25 meters.
Inside: the part for field competitions or ball games. A standard track and field in-field, which can build a standard football field.
Standard semicircle 400-meter track and field runway consists of two 180° semicircles (bends) and two straight sections. The relevant nouns of semicircular track and field are now explained as follows:
(I)Total axis
This line is also called the midline. It divides the site into two parts: east and west. This line must be used as the baseline when drawing and building the site.
(two)Center of circle
Center of circle is on the longitudinal axis. The curves at the north and south ends each have a center, which is the center of the inner and outer protrusions of the curve and the center of each section.
(3) inner protrusion, outer protrusion along
inner protrusion and outer protrusion are the inner and outer edges of the runway. The track and field rules stipulate that the width of the inner and outer protrusions is 5 cm, and their widths are not included in the width of the track.
(IV) straight, curved segment dividing line
straight, curved segment dividing line separates the straight section of the runway from the curved section (bend). These two lines are perpendicular to the longitudinal axis of the site and intersect at the center of the circle. The straight and curved segment dividing lines at the finish line are usually called the first straight curved segment dividing line, or the first dividing line; the other straight and curved segment dividing lines are arranged counterclockwise, and are the second, third and fourth straight curved segment dividing lines in sequence. These four dividing lines serve as the baseline for measuring the runway, and their positions should be marked with obvious marks on the runway. The bend in front of the first straight curved section is usually called the first bend, and the bend in front of the third straight curved section is called the second bend.
(Five) straight section and straight section
straight section is the runway between the first and second curves, and the straight section is the general term for the extension of the two ends of the straight section and the straight section.
(Six) Runway width and branch width
Runway width refers to the width between the inner protrusion and the outer protrusion, also known as the total width of the runway. The width of the lane is the width of each lane.
(seven) lane line
lane line width is 5 cm, and the runway is divided into each lane. The lane line is calculated within the width of the inner runway, for example, the first and second lane lines are included within the width of the first lane.
(8) Calculation line
Calculation line is only used to calculate the circumference of the runway, so it is called a calculation line. There is no need to draw calculation lines when drawing the site. The rules of track and field competition stipulate that the calculation line of the first branch is 0.30 meters away from the outer edge of the inner edge of the track, and the calculation line of the second to eighth roads is 0.20 meters away from the outer edge of the inner branch line. Since athletes usually run on this undrawn line during racing, the calculated line is also called the actual running line.
