Amtrak trains accommodate most wheelchairs in use today, provided they meet the ADA definition of a "common" wheelchair. Dimensions: The chair should not exceed 30 inches (76 centimeters) wide, 48 inches (122 centimeters) long and 2 inches (5 centimeters) of ground clearance. Weight: The weight limit for an occupied wheelchair is 600 pounds (273 kilograms). Manual and battery powered: We permit both manually operated and battery powered wheelchairs that meet the above limits.