Headquarters:
mageba sa
Solistrasse 68
8180 Bulach
Switzerland
Tel: +41-44-872 40 50
Fax:
USA
SR 520 West Approach Bridge North, Washington
Project description
The Governor Albert D. Rosellini Bridge-Evergreen Point (commonly called the SR 520 Bridge) carries State Route 520 across Lake Washington from Seattle to Medina. The SR 520 Bridge Replacement development has reached its latest construction phase with the West Approach Bridge North Project. Expected to be completed in the summer of 2017, the new West Approach Bridge North will carry westbound cars, buses and trucks from the new floating bridge to the Montlake area.
mageba scope
The pre-stress girder structure will feature wider lane, shoulders and have a 14-foot-wide bicycle/pedestrian shared path on the north side of the bridge. mageba supplied seven TENSA-MODULAR (type LR) expansion joints for the new West Approach Bridge North. The joints range from 6 to 8 gaps that allows up to 25 in (640 mm) longitudinal service movement. The joints are equipped with noise-reducing “sinus plates”, which provide a smooth driving surface for vehicles, minimizing vibration and noise by up to 80 %. Another feature is the ROBO-MUTE blanket panels, a system of mat layered membrane that reduces noise transmitted from beneath the joint.
Modular expansion joints ready for transportation from the production hall in Pottstown (PA) to the site
TENSA-MODULAR expansion (LR8) equipted with sinus plate noise reduction surface
Pouring the concrete into the recess
Car over-rolling modular expansion joint
3D view of the installed modular expansion joint featuring sinus plates and noise protection mats beneath the joint.
The modular expansion joint placed in its recess
Rendering of the modular joint as installed in the bridge
Key Data
Products: | TENSA-MODULAR joints, types LR-LS6, LR-LS7, LR-LS8; ROBO-MUTE sliding panels |
Features: | Noise-reducing “sinus plates” on surface, ROBO-MUTE Sliding Panels |
Installation: | 2017 |
City: | Seattle, Washington |
Type: | Highway bridge |
Built: | 2014–2017 |
