The following references are provided for guidance:
Unified Facilities Criteria (UFC) 2-600-01, Installation Design, Chapter 11.
Army Regulation (AR) 1-33, Memorial Programs.
Army Regulation (AR) 840-1, Department of the Army Seal, and Department of the Army Emblem and Branch of Service Plaques.
Technical Manual (TM) 5-663, Child Development Center, Play Area Inspection and Maintenance Program.
Technical Manual (TM) 5-803-11/Air Force AFJMAN 32-10139, Children's Outdoor Play Areas.
US Army Corps of Engineers web site Engineering Knowledge Online