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Projects: Case Studies

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Location: Everett, WA, USA
Owner: Boeing Aircraft Company
Architect/Engineer: The Austin Company
Contractor/Ready-Mixer: Associated Sand & Gravel
Distributor: Kryton International Inc.

Boeing Everett Factory

Everett, WA, USA

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  • Below Grade
  • Boeing Everett Factory

Waterproofing the Largest Volume Building’s Expansion Under a Single Roof in 1983

Background

The Boeing Everett Factory is the world’s largest volume building under a single roof, measuring in at over
62-acres indoors. Located in Everett, Washington, the sheer magnitude of the center expressed Boeing
to the world and become an icon in the aviation industry. The original facility was designed, engineered,
and constructed in 1967 and was already the largest building by volume in the world. In 1983, Boeing
expanded in order to produce 777s, which meant further construction to an already unique building.

The below grade foundation required very thick concrete pours at 6 ft. thick at the base, tapering to
4.5 ft. (1.38 m) thick at the top. There were 6,500 ft. (1,981 m) of tunnels to accommodate utility
mains and designed for emergency evacuation, and 11,500 ft. (3,505 m) of trenches to facilitate utility
installation. At the time, sheet membranes had an average life expectancy of only five years, which
would mean Boeing would have had to do replacements or repairs six times since 1983.

Solution

Instead of using sheet membranes, the construction team went with Kryton’s Krystol Internal
Membrane™ (KIM®) admixture to completely tank the massive building. KIM was able to
make the concrete the waterproof barrier and replace any need for an external membrane or other
waterproofing method.

Kryton provided the Boeing Aircraft Company with a standard 25-year warranty. Thirty-one years
later and the system continues to perform perfectly to specification, effectively saving The Boeing
Company a lot of time and money in the process.


Products and Systems Used:

Krystol Internal Membrane™ (KIM®)

Krystol Internal Membrane (KIM) is a hydrophilic crystalline admixture used to create permanently waterproof concrete.

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