Related Clues:

• Rail site
• Part of a flight?
• Flight unit?
• Steps between floors
• Railing site
• Way to the attic
• A step up?
• It gives one a leg up
• Part of a flight between floors
• Bad place for a roller skate
• No place for a roller skate
• One of a set of steps
• Fire escape step
• Series of steps between floors
• Notch on the ladder