The total length of the standard runway is 400 meters, and it should be composed of two parallel straight roads and two bends with equal radius. Except for the grass runway, the inside of the runway should be delimited by a flange made of suitable materials. The flange is about 5 cm high and at least 5 cm wide. ? [5]?

Each athlete should occupy one lane in each track race of 400 meters and below, with the minimum lane width of 1.22 meters, the maximum lane width of 1.25 meters and the lane width of 5 cm, and all lanes should be the same. The length of the first lane shall be measured according to the provisions of paragraph 2 above, and the length of other lanes shall be measured at a distance of 20 cm from the outer edge of the inner lane.

Maintenance and management of extended data runway

1. After the plastic runway is laid, it will take 7- 10 days to use it.

2. The plastic runway is suitable for all-weather operation under certain drainage equipment conditions. Plastic track is used for sports practice, competition and students' static fitness, but not for other purposes;

3, to prevent the purification of harmful substances, often keep clean, to prevent severe mechanical impact and friction, vehicles are not allowed to run on the runway, stacked heavy objects and sharp objects, etc. (except standard running shoes). Special spiked shoes must be worn for sports, with the nail length not exceeding 7 mm and the jumping shoes not exceeding11mm. If spikes have long nails, they are not allowed to be used on plastic runways;

4. Prevent temporary load;

5. Prevent fireworks and isolate heat sources, and prevent contact with organic solvents, chemicals, cigarette butts and other kindling and purifying substances.

6, should often spray cleaning with water, after cleaning, a large number of residual water on the rubber surface can be removed with dry cloth. Oil stains can be scrubbed with 10% ammonia water or detergent and washing powder.

Baidu encyclopedia -400-meter standard runway