Application of COD reduces volume of excavation by reducing width of trench, as no individual piece-by-piece duct connection works in the trench are required. In addition, it reduces working space at job site as well as transportation.
Application of COD reduces damaging risk of existing underground infrastructures by reducing trench dimensions.
Application of COD reduces disposal of excavated soil owing to less excavation.
No fine leveling work of trench bed is necessarily required but rough leveling.
No sand padding on trench bed is necessarily required owing to high flexibility and Compressive Load (292kgs/㎠).
2. Installation Stage: Application of COD offers the following advantages.
No piece-by-piece individual connection works in the trench are required, coupling works may be done on the ground if required.
Great saving of construction period.
Great saving of traffic troubles.
Absolutely no inner duct insertion process is required.
Keeps job site clean from bundles of mobilized materials.
No dual mobilizations of materials are required.
3. Finishing Stage: Application of COD offers the following advantages.
No risk of damaging the installed duct by compaction or heavy traffic above the trench after completion owing to good Compressive Load of COD.
Quick removal of temporary site facilities or mobilized materials from job site (COD reel may be released as mounted on trailer or truck).
4. Maintenance Stage: Application of COD offers the following dvantages. The following features of COD enables to save maintenance cost upon completion of installation.
Free from water or humidity infiltration.
Better fire resistance compare to the conventional PVC duct system.
Better Compressive Load (approx. 3 times of PVC).
Easy insertion & replacement of cables owing to absolutely no twisting risk but perfect alignment of the inner ducts owing to welded & built-in single body.