1. Surfaces around the playground must have at least 12 inches of safe materials such as sands, wood chips, rubber mats, etc.
  2. Protective surfacing must extend 6 feet in all directions
  3. Structures more than 30 inches high must be placed at least 9 ft apart
  4. Spaces that could potentially trap children should be less than 3.5 inches or more than 9 inches
  5. Avoid using bare metal for platforms, slides, or steps (when exposed to sunlight, they may reach temperatures high enough to cause serious burn injuries
    1. However, if used they should be orientated so that the metal is not exposed to the sun
  6. All metal edges should be rolled or have rounded capping
  7. Any change of elevation should be obvious
    1. ex: Contrast of colors for elevated surfaces
  8. Elevated surfaces must have handrails to prevent falls and injuries
  9. Equipment should provide accessible play for all children, including ones with disabilities
  10. Make sure all equipment doesn’t have sharp edges and/or points
  11. There should be no dangerous hardware like open “S” hooks or protruding bolt ends
    1. These projections lead to the possibility of entangling children’s clothing
  12. Play areas should be free of tripping hazards
  13. Platforms should minimize the collection of debris
  14. Play area should be adequately shaded to protect against sun exposure, well-drained, visible from nearby paths, away from automobile and bicycle traffic, and separated from water or other natural hazards.
  15. There are no user modifications to the equipment, such as strings and ropes tied to equipment, swings looped over top rails, etc
  16. Designing separate play areas to accommodate the different dimensions, skills, and play styles of the age groups visiting your playground.
  17. Guardrails or protective barriers should be provided on elevated platforms, walkways, landings, stairways, and transitional surfaces.
  18. Playground should be checked regularly

For a more detailed version of safety guidelines take a look at this PDF: https://www.cpsc.gov/s3fs-public/325.pdf