Design and Construction Considerations for Very Large Floating

Structures(VLFSs)

Markus Wernli, PhD, P.E.

BergerABAM Inc.1301 Fifth Avenue, Suite 1200Seattle, WA 98101-2677(206)357-5600wernli@abam.comwww.abam.com

Floating Piers, Bridges, Wharfs, and Breakwaters

Floating Container Terminal,

Valdez, Alaska

Floating Navy Pier

Hood Canal Floating Bridge, Washington

Floating Offshore Drilling Platforms, FPSOs, and Ocean Energy Convertors

Glomar Beaufort Sea Concrete Island Drilling Structure (SIDS)

Floating LNG Processing and Storage Platform (Courtesy Mustang Engineering)

Arco Floating LPG Terminal, Java Sea

Floating Offshore Ports, Bases, and Stabilized Live Fire Platforms

Floating Open Ocean Stabilized Live Fire Platform (Courtesy PCCI)

Design and Construction Considerations for VLFSs

Modular Design

Modular Construction

Standard ModulesSpecialized Modules

Design and Construction Considerations for VLFSs

Construction Location:- Construction Onshore at Waterfront/Drydock- Construction Afloat at Outfitting Dock- Construction Afloat in Protected Deep Water Site- Construction Offshore at Deployment Site

Cost per Square Foot Area

Source: Federal Reserve Bank of New York, based on an analysis of CoStar Group data, April 2008.

New York City Land Prices VLFSs

Cost Factors- Design Sea State- Platform Size- Payload/Freeboard

Protected Harbor

Benign Water Rough Sea $-

$250

$500

$750

$1,000

$1,250

$1,500

Thank you!

Markus Wernli, PhD, P.E.

BergerABAM Inc.1301 Fifth Avenue, Suite 1200Seattle, WA 98101-2677(206)357-5600wernli@abam.comwww.abam.com