International Play Equipment Manufacturers Association
IPEMA is a self-governing organization established to regulate the safety and standards of the play equipment industry.

U.S. Architectural and Transportation Barriers Compliance Board
For latest information on the development of specific access requirements for playgrounds.

ASTM
ASTM measurements establish minimum acceptable performance specifications for everything from swings to play surfacing.

The U.S. Consumer Product Safety Commission
CPSC Handbook for Public Playground Safety serves as the reference for the entire playground industry.