DOCK EDGE WELDED ALUMINUM FIXED 4 STEP LADDER. Dock Edge Welded Aluminum Fixed 4 Step Ladder. These durable ladders are ideal for sure-footed access to and from the water or boat and with a load capacity of 400 lb. these rugged ladders will stand the test of time. Perfect for seawalls or dock applications with varying water levels. All ladders are packed in compact display cartons for easy shipping and convenient retail presentation.