"The expandable cable covers feature an AMS (Advanced Modular System), or a series of interlocking parts that allow an unlimited number of center sections and cable channels. Separate ramp ends can also be snapped onto the same brackets to create a smooth transition to the center piece(s). The complete set prevents potential tripping hazards while creating a safe, flush surface for heavy traffic. Each center section is made with raised diamond-shaped treads that add traction during wet or slick conditions. Hinged lids reveal five channels below that can protect cables, cords, hoses, or wires up to 1.25"" in outside diameter. This makes for easy access when replacing old cords or loading new cords. These durable wire covers can handle a range of traffic including pedestrian traffic all the way up to heavy trucks with a load capacity of 32,600 lbs per axle."