These flip-up wide step ladders have a 4″ tread depth and are ideal for sure-footed access to and from the water or boat. With a load capacity of 665 lb. these rugged ladders will stand the test of time. Perfect for seawalls or dock applications with varying water levels. Rail Height: 19-1/2″ above the dock. Distance to first step: From dock surface, 11″ & 12″ between steps. Steps: Are 4″ deep and 16-3/4″ wide. Capacity: 665 lb. (300 kg).