Aluminum ladder 4 by 5M (5.7M)

This notation breaks down the ladder’s structure and its maximum length: Term Meaning Typical Specification 4 Number of Sections/Folds The ladder consists of four hinged sections. x Connector Indicates the multiplication of sections and steps. 5 Rungs per Section Each of the four sections contains 5 rungs (or steps). Total Rungs (4 sections $\times$ 5 rungs) 20 rungs total.