Below are some of the recommendations that the U.S. Consumer Product Safety Commission (CPSC) offers from its Handbook for Public Playground Safety. The guide can be downloaded in full here.
Protective Surfacing
Gorilla Playsets Premium Rubber Mulch
Since almost 60% of all injuries are caused by falls to the ground, protective surfacing under and around all playground equipment is the most critical safety factor on playgrounds. Certain manufactured synthetic surfaces also are acceptable; however, test data on shock absorbing performance should be requested from the manufacturer.
Asphalt and concrete are unacceptable. They do not have any shock absorbing properties. Similarly, grass and turf should not be used. Their ability to absorb shock during a fall can be reduced considerably through wear and environmental conditions.
Certain loose-fill surfacing materials are acceptable. Surfacing materials are acceptable, such as the types and depths shown in the table:
| Type of material | 6” Depth | 9” Depth | 12” Depth |
| Gorilla Playsets Premium Rubber Mulch | 12' Fall Height | N/A | N/A |
| Double shredded bark mulch | 6' Fall Height | 10' Fall Height | 11' Fall Height |
| Wood chips | 6' Fall Height | 7' Fall Height | 12' Fall Height |
| Fine sand | 5' Fall Height | 5' Fall Height | 9' Fall Height |
| Shredded Tires* | 10-12' Fall Height | N/A | N/A |
| Fine gravel | 6' Fall Height | 7' Fall Height | 10' Fall Height |
* This data is from tests conducted by independent testing laboratories on a 6-inch depth of uncompressed shredded tire samples produced by four manufacturers. The tests reported critical heights, which varied from 10 feet to greater than 12 feet. It is recommended that persons seeking to install shredded tires as a protective surface request test data from the supplier showing the critical height of the material when it was tested in accordance with ASTM F1292.
It should be recognized that all injuries due to falls cannot be prevented no matter what surfacing material is used.
Fall Zones
A fall zone, covered with a protective surfacing material, is essential under and around equipment where a child might fall. This area should be free of other equipment and obstacles onto which a child might fall. Stationary climbing equipment and slides should have a fall zone extending a Minimum of 6’ in all directions from the perimeter of the equipment.
Swings should have a fall zone extending a minimum of 6’ from the outer edge of the support structure on each side. The fall zone in front and back of the swing should extend out a minimum distance of twice the height of the swing as measured from the ground to the top of the swing support structure.