The invention provides for a method of designing spiral ribs for a duct used in cable blowing comprising the steps of selecting an apex angle of rib in the range of 80 to 120 degrees; determining the longitudinal spacing between the ribs from the cable thickness and mass; deriving a range of values for rib density a...
The invention provides for a coupler for joining two lengths of conduit comprising of at least a first part and a second part wherein the first part has a mouth at both ends to receive the two lengths of conduit and is substantially hollow between the mouth at both ends and the second part has a mouth at both ends t...
The invention relates to a spiral ribbed duct for holding the optic fibre transmission cables used in telecommunications, the process of manufacture of such duct and an apparatus thereof. The duct comprises an outer layer, an inner layer and a plurality of spiral ribs. The outer layer consist of high density polyeth...