74 A SUMMARY OFACCESSIBILITY STANDARDS FOR OUTDOOR DEVELOPEDAREAS accessibility standards for Federal outdoor developed areas Entrance [1014 2] Camp shelters must provide either transfer access or roll-in access at the entrance. Providing shelters with roll-in access enables people using mobility devices to also shelter the device. Transfer Access [1014 2 1] To provide transfer access at the entrance to a camp shelter, a clear ground space at least 36 by 48 inches positioned for a parallel approach must be provided along the open side of the camp shelter. One full, unobstructed side of the clear ground space must adjoin or overlap an ORAR or trail, as appli- cable, or another clear ground space. The surface of the clear ground space must be firm and stable. When the surface of the clear ground space is con- structed of asphalt, concrete, or boards, the slope of the clear ground space must be no steeper than 1:48 (2 percent) in any direction. When the surface of the clear ground space is constructed of materials other than asphalt, con- crete, or boards, slopes no steeper than 1:20 (5 percent) are allowed when necessary for drainage. The camp shelter floor at the entrance or opening must be no higher than 19 inches when measured from the clear ground space. This enables people using mobility devices to pull alongside of the shelter and transfer from the mobility device to the shelter floor. For people using power mobility devices, raised floor shelters that provide transfer access may make it difficult to bring the mobility device into the shelter to protect it from the weather.