Sierra Construction is proud to submit the revolutionary multistory fulfillment center, Prologis Georgetown Crossroads for consideration. The first of its kind in the United States, this unique three-story 590,000 square foot industrial warehouse is minutes from downtown Seattle and was completed December 2018. Located in the historic Georgetown district, the project features truck ramps leading to loading docks on the second level, which provides a land-constrained urban area with valuable industrial square footage. The project is 100% leased.
Georgetown stands at about the height of a nine-story building and includes two levels of 130-foot semi-truck courts.
The double-loaded Level 1 features two 130’ concrete truck courts (located on the East and West sides of the building), has a 28’ clear height, 66 dock-high doors and 4 drive-in doors. Level 1 is also accessible by multiple arterials.
Level 2 is not only accessible by freight elevators, but two truck ramps that were engineered to accommodate long haul, fully-loaded, full-size trucks to Level 2’s 130’ concrete truck court. This level has a 24’ clear height, 38 dock-high doors and 2 drive-in doors.
Level 3 is forklift accessible by three freight elevators from the ground floor. With a 16’ clear height, Level 3 was designed for light manufacturing, production and office space.
NessCampbell Cranes and Rigging operated a Manitowoc 2250 Crawler and 250 ton conventional truck crane with rolling outriggers to perform the tilts.
The tallest panel in the building was 55’-7 ¼”; widest at 31’-7”; and heaviest at 210,458 lbs. With the tilt panels just over 55’ high, they reached approximately 2/3 of the way between the 2nd and 3rd levels providing solid structure for the truck doors on Level 2.
Perimeter tilt panels reduced the cost of cladding. Dock doors were desired along the entire building length, so the perimeter tilt panels were used in lieu of steel braced frames for the lateral force resisting system. The tilt panels could not practically extend to the 85’ tall roof, so the engineering team developed an additional seismic load transfer from the braced frames above to the lower level tilt panels.
In addition to the main structure, a 466 stall, 4-story parking structure was constructed on the North side of the building with 3-levels of post-tensioned concrete slabs, concrete columns, and special reinforced shear walls.