Viaduct
This concrete box girder viaduct, an Award of Merit in the 1984 Outstanding Civil Engineering Achievement competition, helps complete a seven mile gap in the Blue Ridge Parkway in North...
Retaining Wall
The foundation of this off-ramp in Manchester, New Hampshire is made up of end-bearing piles and sloping rock anchors�an innovation that is unique to the United States. End bearing piles...
New Tools Help Find Flaws
Certain electromagnetic tools for nondestructive evaluation of existing infrastructure, though not widely used, can cut cost and time of identifying flaws in existing infrastructure. Five...
Throgs Neck Bridge: Why Did Its Deck Deteriorate?
Rapid deterioration of the concrete roadway decks of the Throgs Neck Bridge approach viaducts was found to be due to secondary tensile and fatigue stresses brought on by deflection of...
Stadium Completed Night Before Game
Construction problems with a major addition to the Clemson Memorial Stadium in Clemson, S.C., halted construction for four months. In order to make up the time, the design firm had to...
Re-decking a Bridge With Precast Concrete
Re-decking a 1627-ft deck girder bridge on the Pennsylvania Turnpike with precast concrete slabs allowed the bridge to remain partially open to traffice during the entire construction...
Venezuelan Dock Features Unconventional Design, Quick Set-Up
This structure, designed by Caracas design/construct firm Precomprimido, kills two birds with one stone: a series of huge, hollow concrete cylinders both support the service deck of the...
World's Tallest Offshore Platform Stands in 1025 Ft of Water
During the summer and fall of 1977 and 1978, Shell Oil installed the world's deepest drilling and production platform in water. Located in 1025-ft of water at the Cognac tract...
Stub Girders Cut Steel Use
One innovation in steel building construction, now 10 years old, is the steel stub girder floor framing system. By using a girder that is a composite of steel girder, metal deck and lightweight...
Counteracting Chloride-Induced Damage to Bridge Decks with Latex and Plastic
Salt used to control ice causes deterioration of reinforced concrete bridge decks, but recent developments, though still somewhat expensive, can prevent deterioration of existing decks....
Building New Bridges from Old
The Duluth, Missabe and Iron Range Railway Co. needed a new 150-ft (64-m) two-span railroad bridge. Minimum time and low cost were the demands. In response, the designers used steel girders...
New River Gorge Bridge: World's Longest Steel Arch
The world's longest steel arch bridge, spanning the New River Gorge Bridge in the south central area of West Virginia, is scheduled to be completed in Sept. 1977. The main...
Concrete Bridge-Tunnel Has No Deck
Engineers solve the problem of how to economically span a single track railroad without interrupting train traffic. Highway fill was placed over post-tensioned precast concrete arch sections...
James B. Eads and His St. Louis Bridge
Eads Bridge at St. Louis, a century old engineering achievement, was designed, promoted, and built by an intensely dedicated and self-educated man, James B. Eads. This structure was an...
George Washington Bridge Redecked with Prefabricated, Prepaved Steel Panels
The Port Authority of New York and New Jersey has embarked on a �37,000,000 project to totally replace the upper roadway of the 46-yr old George Washington Bridge. The scheme, chosen from...
World's Third Longest Cantilever Bridge
This report includes the planning, design and construction procedure of the world's third longest double deck, cantilever bridge, Osaka Port Bridge, which was completed in...
Steel Stress-Ribbon Concept�� Will It Save Money�
The stress ribbon structure, a fairly new and unusual concept, can be built with central sags of less than 2% of the span length using currently available materials and technology. Possibilities...
University of Idaho Barrel-Arch Roof Wins Outstanding Structural Engineering Award
The world's longest span wood structure now covers the football stadium at the Univ. of Idaho in Moscow, Idaho. The trussed arch consists of an upper and lower wood deck connected...
Landmark Erie Canal Structure Rehabilitated
The lower level of the Broad Street Bridge, which dates to 1823, was an aqueduct which carried the Erie Barge Canal over the Genessee River in Rochester, New York. The history of this...
Short Span Bridges
Short span bridges, seemingly simple and innocuous structures, in fact embody many interesting problems and developments: The need to replace hundreds of thousands of bridges (safety and...
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