Evac + Chair | IBEX Spiral Ascent and Descent Evacuation ChairEvac + Chair IBEX Spiral Staircase Ascent and Descent Mobile Evacuation Chair For Emergency and Evacuation Introducing the Evac + Chair Ibex evacuation chair, a robust solution designed for safe evacuation on spiral and narrow staircases. With a payload capacity of 159kg, it supports efficient ascent and descent operations. The chair features a telescopic handle and adjustable manual brake system, providing operators with precise control over movement