ALACCBPR - Aluminum Fixed Ladder Over Parapet WallALACCBPR Aluminum Fixed Ladder Over Parapet Wall This model ALACCBPR ladder permanently attaches to a structure; it is designed to allow access up and over roof parapet walls. Parapet walls are often used for safety reasons, to prevent people from falling off the roof. This ladder comes standard with P shaped vertical walk through handrails that extend over 42" above the top rung. P shaped handrails are a type of handrail that have a shape similar to