How to Mark a Discus Sector

The discus sector affords athletes 34.92 degrees of the compass on which they may land their throw. Discus field setup is a matter of using right triangles with hypotenuses along the center line of the discus sector to find the two halves of the sector. Use a few assistants with tape measures the next time you need to set up an official discus sector.

Things You'll Need

  • 2 tape measures, at least 100'
  • 2 assistants
  • 3 stakes
  • String, at least 100'
  • Chalk or turf paint
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Instructions

    • 1

      Hold the end of a measuring tape at the center of the discus ring while helper 1 pulls out 95' 4-3/4" of tape to the location where you want the center of the discus sector. Have him mark the point "A" with a stake.

    • 2

      Release the first tape measure and hold the end of another one at the center of the discus ring while helper 2 runs off 100 feet of tape to the right of point A. Meanwhile, have helper 1 measure off 30 feet to the right of point A. Where helper 1 and helper 2 are able to meet with exactly 100 feet and 30 feet on their measuring tapes marks the right sector line. Drive a stake into the ground at the intersection.

    • 3

      Hold the measuring tape at the center of the discus ring while helper 2 unreels 100 feet of tape to the left of point A and helper 1 measures 30 feet in the opposite direction from point B. Where the helpers meet marks the left sector line. Drive stake C into the ground.

    • 4

      Attach a string to stake B and pull it taut to the center of the discus ring. Use it as a guide to paint or chalk the boundary of the discus sector. Repeat this process from stake C to the center of the discus ring.