Folding Ladder - 5 Step These Portable Emergency Boarding Ladders are made of molded-in, high-visibility orange polycarbonate with nylon rope supporting the frame. They secure quickly to cleats, railings, stanchions and halyards and will support up to 300 pounds.WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.