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All of the above described earth retention systems may be designed and installed to perform in a permanent capacity. This is accomplished by designing for a longer service life and modifying the system accordingly. Other adaptations include changing the system to provide a more aesthetically pleasing appearance if the service life includes visual exposure.
Some of the modifications include:
- Using precast concrete, cast-in-place concrete or
treated lumber for lagging between soldier piles.
- Application of protective coatings to all exposed steel surfaces, such as soldier piles, sheet piles or tieback anchorages.
- Using double corrosion protection methods on
soldier piles and tieback anchors.
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