Generally, they do not, but that depends on the application and your requirements. Just lay down and place your pipe or hose into the open slot. Our 2” pipe ramp weighs 36 pounds and our 4” pipe ramp set (2 ramps and our interconnector) weighs a total of 84 pounds each and are stabilized by the inserted pipe. If they need to be anchored in place, we recommend the GRK’s RSS™ Rugged Structural Screw.