OFFICIAL BASKETBALL RULES 2010 Basketball Equipment 1261 of the backboard 125±1 Diagram 5 Ring mounting plate at the ring mounting plate be fixed to the framework according to the measurements given in Diagram 6. 1251 7 Pressure release rings with the following specifications shall be used for Levels 1 and release mechanism shall these characteristics. but e any damage to either the ring or the backboard. The design of the ring and its construction shall The pressure release rings shall have a positive-lock cengage until a static load of a minimum of 82 kg an im of 105 kg has een applied vertically to the top of the ring at theOFFICIAL BASKETBALL RULES 2010 Basketball Equipment April 2010 Page 9 of 21 Must not extend below the bottom edge of the backboard Diagram 5 Ring mounting plate 3.6 For existing basket support structures, it is recommended that the ring mounting plate be fixed to the framework according to the measurements given in Diagram 6. Must not extend below the bottom edge of the backboard Diagram 6 Ring mounting plate for existing baskets 3.7 Pressure release rings with the following specifications shall be used for Levels 1 and 2 and are recommended for Level 3:  It shall have rebound qualities close to those of the fixed ring. The pressure release mechanism shall ensure these characteristics, but not cause any damage to either the ring or the backboard. The design of the ring and its construction shall be such that the players' safety is ensured.  The pressure release rings shall have a 'positive-lock' mechanism which must not disengage until a static load of a minimum of 82 kg and a maximum of 105 kg has been applied vertically to the top of the ring at the most distant point from the Basket Equipment.indd 9 22.12.10 11:37