SPRING RIDER J-Bolt Mounting AT http://www.cpsc.gov/PageFiles/122149/325.
J-bolt hardware is not included. (Note some rider bases take 6 J-bolts. Adjust the count below by 2 for each item if you need 6 J-bolts) Rider is preassembled to the top of the spring. Hardware for that part is not needed.
Thickness varies depending on the type and amount of safety surfacing used. Widening here is optimal.
See details in the Public Playground Safety Handbook for details about Spring Rockers and other safety requirements. On the web: http://www.cpsc.gov/PageFiles/122149/325.pdf 6 feet 6 feet 6 feet 6 feet Tips from a professional installer: 1) Our professional installer uses a piece of metal conduit under the base of the spring rider spanning the hole to keep it from sinking into the concrete too far. When the concrete is dry just pull out the conduit from underneath the base.
