LINE2design EMS Stair Chair - Ambulance Firefighter Evacuation Medical Lift Stair Chair with Quick Release Buckles The sturdy aluminum frame is strong enough to hold up to 350 pounds. Three adjustable straps with quick-release buckles ensure the patient&#039;s comfort and safety. Non-slip grips on the rear and front handles help rescuers maneuver the Aluminum Stair Chair easily. Compact folding allows you to stow the stair chair in the ambulance without taking up a lot of space. Chair is designed to help EMTs-Paramedics transport patients through tight spaces and up or down stairs.