When deploying a fiber network, traditional trenching methods can be expensive and time-consuming - and cause extensive disruption to the local area.
In a city, for example, streets have to be closed while they are dug up - annoying residents, drivers and local authorities. Costs for labour, permits and restoration fees are high, adding to budgets and even making some projects uneconomic.
Consequently, many installers are now switching to micro trenching (also known as slot-cut trenching). This offers substantial benefits over traditional methods as it involves using a diamond circular saw to cut a 0.75 - 1.5 inch wide, 4 inch deep trench. Microduct is installed in the bottom of the trench and it is then backfilled and sealed, speeding up the project.
By comparison, traditional trenches are at least 12 inches wide, in order to fit the size of the smallest excavator buckets, and deployments take more passes to backfill. These factors combined mean that micro trenching is typically 60 per cent cheaper than traditional excavations, as well as being much less disruptive to the urban environment.