choices for large and seismic joint gaps in parking decks have been
limited to cover plates and self-centering-bar systems. Neither of
these systems is watertight. Both of these systems are noisy. The
RandD goals for the
SYSTEM from EMSEAL were: 1) Watertight; 2) Traffic and Load
Durable; 3) no invasive anchors; 4) no hard connections to concrete;
for joint openings larger than 4-inches (100mm); and 5) Quiet.
This video shows a 3-year old
SYSTEM installation in a shopping mall. The failing and terribly
noisy self-centering bar system was replaced in phases. The result
is a dramatic difference in noise between the yet-to-be replaced
older systems and the SJS seismic expansion joint system.