Page 42: of Maritime Reporter Magazine (July 15, 1974)

Tacoma Firm To Construct $32-Million Concrete Hull

For Offshore LPG Storage

Concrete Technology Corporation has ex- panded its operations in association with

Trans-Energy International, Inc. of Hamil- ton, Bermuda. The two companies have jointly formed Concrete Energy Systems,

Inc. for the purpose of constructing and marketing transportation and storage facil- ities for LPG, utilizing steel tanks mounted on a prestressed concrete hull.

The first project to be constructed by Con- crete Energy Systems, Inc. will be under a $32-million contract which has been execu- ted with Atlantic Richfield Indonesia, Inc., for a floating LPG terminal to be anchored 50 miles off the coast of Java. The terminal will be used in conjunction with the ARCO-

Indonesia Ardjuna Field in the Java Sea.

The structural design of the concrete hull will be done in Tacoma by ABAM Engineers,

Inc. The design will feature a prestressed concrete hull 461 feet long, 136 feet wide, and 56 feet deep, which will support twelve 38-foot-diameter by 168-foot-long cylindrical

LPG storage tanks. Below-deck compart- ments will house six of the pressure vessels, and the remaining six will be mounted on the top deck. The total storage capacity of the steel tanks will accommodate 375,000 barrels of LPG at a temperature of minus 50 degrees Fahrenheit. The concrete float

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Representatives in principal domestic and foreign seaports 40 will serve as a storage and distribution fa- cility for gas from the Indonesia wells, and will include housing for 50 personnel needed to serve the operations aboard. \ 375,000 barrels of LPG at minus 50 degrees Fahren- heit will be stored in 12 steel cylindrical tanks — six below deck and six mounted on the top deck of the concrete hull.

The prestressed concrete hull will be fab- ricated by Concrete Technology Corporation at its Blair Waterway plant in Tacoma,

Wash. A combination of precast and cast- in-place construction will be used, with lat- eral and transverse post-tensioning employed throughout the multicelled hull.

In conjunction with this project, Concrete

Technology Corporation, under permit from the U.S. Army Corps of Engineers, is build- ing a 150-foot by 600-foot graving dock on its property in Tacoma. The graving dock is an important step in the long-range growth plans of Concrete Tech, and the expansion is expected to find use for a variety of proj- ects in the future.

Major subcontractors on the project are the American Bridge Division of the U.S.

Steel Corporation, which will fabricate and install the LPG tanks, and Lewis Refriger- ation Company of Woodinville, Wash., which, will design and build the main refrigeration plant to cool the incoming hot propane liquid from 115 degrees Fahrenheit to minus 50 degrees Fahrenheit.

Upon completion of the facility in Tacoma, it will be towed to Indonesia under a towing arrangement to be made by Concrete Energy

Systems, Inc.

Company officials expect the project to take about 18 months to complete.