--- title: G18 --- ROBOTS may not extend more than 15 in. beyond their FRAME PERIMETER. _Violation: FOUL. If repeated, offending ROBOT will be DISABLED._ > Examples of compliance and non-compliance of G18 are shown in Figure 3-2. > > Yellow bars represent the measurement of the FRAME PERIMETER and are drawn in the same orientation of the ROBOT’S FRAME PERIMETER. Green bars represent a measured extension from the FRAME PERIMETER that has not been exceeded. Red bars represent a measured extension from the FRAME PERIMETER that has been exceeded (violating G18). ROBOTS A and C violate G18, whereas ROBOT B does not.