A2. Section at curved concrete stairs at northeast and southeast corner portals -- A4. Plan detail, exterior stair -- A6. Plan detail, stair at mechanical room -- B2. Section at wall at northeast and southeast corner portals -- B4. Exterior handrail system at curved stairs at northeast and southeast portals -- B6. Stair section at stair to ground floor mechanical room -- C2. Utility ramp to Baker Hall -- D2. Section detail, alternating tread stairway at elevator machine rooms -- D4. New HP ramp at Baker Hall -- E2. Plan detail, altenating tread stairway at elevator machine rooms -- E4. Typical step at concrete stairs -- E5. Railing elevation at curved stair