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Micro Trenching
A Cost Effective Deployment Method
for Open Access Networks
Gary StahlbrandDirector of Sales
TeraSpan Networks [email protected]+1
604-638-5476
mailto:[email protected]:[email protected]
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Building an Open Access Network
Doesnt Have Look Like This
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Fiber deployed in a narrow saw cut 0.5 - 1.5 inch wide,
typically 7 to 12 inches deep in asphalt
1 2 inches wide, typically 9 to 18 inches deep in soil
Depth determined by risks (grind depths)
Ideal fit for hardscape deployments Speed up deployment time by
up to 50%
Reduce costs by up to 50%
Minimal impact on the community
Quick, consistent and easy to deploy
Savings realized by reduced labor and restoration costs
Micro Trenching is a Cost
Effective Alternative
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Options - Open Cut Trench
Open Cut Trenching requires
major excavation and restoration
Micro Trenching uses a narrow
cut and which restores easily
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Options - Mini Trenching
Mini trenching leaves a wide
trench with debris
Micro trenching is clean
and less disruptive
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Options - Boring
Bore pits are costly to restore and
there is still risk of utility impact
The shallow Micro Trench is
less risk to other utilities
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Types of Micro Trenching
DirectBuried
Place the cabledirectly in the saw
cut
Air Blown
Install theconduit and
blow the fiber
after installation
Inlaid
Zipper thefiber into a 2piece conduit
during install
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Road Saws
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Ditch Witch and Marais
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Determining Cut Depth
Municipal Grind Depth (2- 4)
+Buffer Zone / Cover (4 min)
+
Conduit Height (1- 3)
Cut
Depth
Saw Blade
Road Surface
Typical cut depths are 7-12 inches
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Reinstatement
Premium cold asphalt mix swept into the saw cut andpacked with a
weighted packing wheel
Grout mix with the last half inch covered with a hot tar
sealant
Work with the local road authority to determine the
best restoration technique for your environment
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Mature / proven technology
Deployed globally
Cost is typically 50% less than traditional methods
Best savings in hard surface deployments
Less disruptive to the community
High fiber counts possible in micro trenches
Suitable for all fiber applications
Conclusions
