Related Clues:

• Perimeter of a billiards table
• Roller coaster track makeup
• Upbraids, with "at"
• Hawk-headed god exists to save lake birds
• Ship deck guards
• Bars under bar cars
• Bed safety features
• Staircase fixtures
• They may go up the steps and under the train
• Skate park bars
• Behave strangely when one goes off them?