Fairbanks Natural Gas LNG Storage Tank
Preload Cryogenics, LLC completed the design and construction of a 20,000-m3 (5.25 million gallons) full containment LNG storage tank consisting of a precast, prestressed concrete secondary containment wall (35.2 meters in diameter by 27.1 meters tall), a 9% nickel primary containment wall (33.3 meters in diameter by 23.5 meters tall), 9% Ni primary and secondary floor plates, and an ASTM A5l 6 carbon steel dome with an aluminum suspended ceiling.
- On-site work included excavation and replacement of approximately 30,000 yd3 of unsuitable subgrade to reach stable till, the installation of an active (and passive) subgrade cooling systems to maintain the in-situ permafrost conditions and construction of an at-grade concrete base slab (with foundation heating elements).
- Precasting of the secondary wall panels was performed off-site concurrently with subgrade improvement operations and foundation construction work. The wall panels were transported to the site, erected and braced over nine (9) days.
- Fabrication of the carbon steel dome and the suspended ceiling was accomplished simultaneously with the outer wall construction and erected before winter conditions (in October) to "dry-in" the inner tank work.