One Convention Place

The Jefferson (12th & Jefferson Workforce Housing)
April 28, 2017
Olivian Tower
April 28, 2017
Location: Seattle, Washington

The $40 million One Convention Place project is one of the three developments to the Washington State Convention and Trade Center major expansion. The 22-story tower is cantilevered over the existing Convention Center approximately 25 feet and is designed to allow for connection of structural members for a canopy over Pike Street. The building contains over 300,000 square feet of office space, 50,000 square feet of convention center expansion space and 120,000 square feet of underground parking. The exterior cladding is a combination of pre-cast concrete at the base with conventional curtain wall from level seven up.

ORA was engaged to perform onsite structural inspections and materials testing services as well as overseas structural steel fabrication inspection and nondestructive examination (NDE). Structural steel was fabricated by Samsung Heavy Industries Co. Ltd. at their Koji Island Shipyard Facility and their Tangjin Plant, both located in South Korea. Because of the core column sizes, the core column units were rolled and fabricated at the SeAH Steel Corporation Facility, located in Pohang City, South Korea.

Testing and inspection services performed by ORA included:
  • Back-painted spandrels
  • Epoxy-grouted anchor bolt installation
  • Expansion anchor bolt installation
  • Shotcrete
  • Spray-applied fireproofing
  • Precast concrete fabrication and erection
  • Prefabricated steel stair erection
  • Tieback grout strength
  • Reinforced masonry
  • Full penetration welding and NDE for special moment resisting frame
  • Reinforced concrete
  • Shoring system welding
  • Steel decking
  • Structural steel embedded items in concrete