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Harrison Street Expansion Joint Installation

UNIPRO was contracted by STP to install the steel expansion joint system with an elastomeric gland at Harrison Street/North Portal.

The system was installed in sections with special care taken to the field welds provided by UNIPRO.  UNIPRO coordinated each phase of the installation with STP and successfully finished in time for each scheduled concrete pour.  After the concrete pour was completed, UNIPRO returned to remove all setting devices, including grinding away coil-rod and hex jam nuts used in leveling the EJ Strip Seal System by Watson Bowman.

After passing a successful inspection, the neoprene elastomeric gland was field installed in continuous lengths spanning the entire roadway length on both sides of the Harrison Street bridge.  Using an adhesive lubricant UNIPRO began installing the elastomeric gland to complete the installation.

Before work could begin all dimensions of the “block outs” were inspected and approved prior to the EJ installation.  Layout of the Watson Bowman Strip Seal were performed in full 20 foot lengths and then welded together until the entire assembly was completed across the bridge interface to structure.  The EJ was set in place to proper height and spacing with careful consideration of the crown in the roadway and was anchored using steel L angle bolted or welded to the EJ with added form attachments to secure the Strip Seal EJ stays in place during the concrete pour.  To protect the EJ gland-cavity during the concrete pour backer rod was inserted and taped over.  Backer rod was removed after the concrete pour for the insertion of the neoprene gland.

The work was completed within 2 weeks.