The Instant Stairway tower is a versatile unit that can easily convert both a standard Span 300 and a Span 400 mobile access tower into a stairway tower. Providing safe landings every two meters, no special guarding is required. The unit uses standard guardrails, bracing frames and toe board. Stairway steps are 144-mm deep, with a clear width of 450 mm, making it easy to carry tools. The step rise is 230mm and the angle of inclination is 51 degrees. www.instantupright.com