Seattle, Washington 2021-05-19 17:29:34 –
Both West Seattle Bridges are ready for repairs and upgrades as the contractor for the rest of the work has been selected. Kraemer North America is the company.
2017 file photo by Patrick Robinson
Kraemer North America will be the award-winning contractor for the final repair of the West Seattle High-rise Bridge and the Spokane St. Swing Bridge. Kraemer made the highest scoring suggestions based on technical benefits, total price, and interviews.
The high-rise bridge has been closed since March 2020, and an expansion process was undertaken to decide whether to repair or replace the damaged 36-year-old structure.
When Mayor Darkan chose the repair option, about 30% of the work to stabilize the bridge was done by a design and construction team, including Kraemer NA. Epoxy was injected into the crack, a post-tension steel cable was attached to the outside (but inside the girder), the girder was wrapped in carbon fiber reinforced polymer, and the damaged bearing of peer 18 was released.
The monitoring process then began to determine how bridges and partial repairs would be carried out in the winter. When completed (even if it allows snow in February), the Seattle Department of Transportation will be responsible for the remaining year’s work on both the skyscrapers and the Spokane Street Swing Bridge, which were found to be cracked. We have issued a new qualification application. Although it has slightly different properties. SDOT estimates that repair work on high-rise bridges will cost $ 58 million and additional work on swing bridges will cost $ 14 million. The work is done in the form of preventive maintenance, such as injecting epoxy into the cracks and wrapping carbon fiber both inside and outside the movable span. There are also plans to upgrade the control system and refurbish the hydraulic cylinders, allowing two halves to rotate away from the river.
Part of the remaining work to be done on the high-rise bridge is more post-tension steel cables, additional carbon fiber wrapping, and injection of grout slurry material around the base of peer 18 (eastern side of the river).
Construction of the high-rise bridge will be completed and the bridge will be open again by mid-summer 2022.
Kraemer North America named as primary contractor for remaining West Seattle Bridge repairs Source link Kraemer North America named as primary contractor for remaining West Seattle Bridge repairs