Heavy Duty Chain Guides are connected to the PolyDock in a similar way to that of the Large Poly Pipe Brackets. However, the chain guide allows for the use of a 5/16" or 3/8" chain that is connected to a anchor or weight. When using the chain weight method, the chain should be at a 4:1 slope. For example if the depth of water where the guide is located is 10' then the chain should measure 40' long. Images are provided on this page that illustrate examples of a system using Chain Guides and anchors.