Expansion Joint Systems
Lacey V. Murrow Bridge, Seattle, WA
Maurer System™ Swivel Expansion
Joint Assembly by The D.S. Brown Company
Conventional large movement expansion joint devices are limited to primarily longitudinal movements and/or less than +/- 0.79 inches(20mm) transverse displacement. For joint locations which produce more demanding structural movements, the Maurer System™ Swivel Expansion Joint Assembly by The D.S. Brown Company is provided in the U.S.A. through an exclusive license agreement with Maurer Sohne, Munich, Germany.
Typical Applications Include:
- Long-span structures
- Structures located in seismic zones
- Curved structures
- Structures with differential longitudinal movements(caused by wind, thermal and seismic conditions) or differential vertical movements
- Structures with anticipated substructure settlement
By utilizing a common-to-all centerbeam swiveling support bar, the Maurer System™ Swivel Expansion Joint Assembly is able to accommodate large longitudinal displacements (X), extensive transverse displacements (Y), and vertical displacements (Z), as well as vertical rotations of up to 10 degrees. The centerbeams are free to slide on swiveling support bars, which provide equidistant control for centerbeams without the limitations of typical mechanical control devices.
Seismic Movement Capability
Dynamic Testing, University of California, Berkley, CA
Dynamic tests conducted at the University of California at Berkeley subjected the Maurer System™ Swivel Expansion Joint Assembly by The D.S. Brown Company to high-velocity seismic displacements. This first-of-its-kind test program included velocities of more than 40 inches per second (1015mm/sec) in both longitudinal and transverse directions. The successful test results proved the unique capabilities of this patented device in seismic applications.