Aerial duct with ribbed liner

An aerial duct having multiple ducts for supporting transmission cable and the like comprising:

• a first duct formed from a first polymer;
• a support strand contained within said first duct, said support strand having a sufficient strength to hold the aerial duct suspended between pole supports;
• a second duct formed from said first polymer, said second duct having an inside surface and an outside surface, said second duct being joined to said first duct;
• a polymeric inner duct having a low coefficient of friction formed from a second polymer contained within said second duct having an exterior surface and an interior surface;
• and
• a multiplicity of ribs formed along the length of the interior surface of said inner duct, said ribs having a predetermined height and being spaced apart a predetermined distance so that valleys are formed therebetween, the inner duct having an internal diameter sufficiently greater than the external diameter of the transmission cable so that the transmission cable may be passed through the inner duct in direct contact with the ribs along the interior surface of said inner duct after the aerial duct has been suspended.