Keeping It Together
A new framing system for precast concrete columns and beams will allow tall buildings to withstand large earthquakes without damage to the structural integrity of the building. By using...
Box Girder Balancing Act
On November 18, 1999, cranes lowered into place the last of 202 precast concrete segments that form the main span of the new Sagadahoc Bridge, a $46.6 million crossing that boasts the...
Sum of the Parts
As with all of the bay bridges that serve as life lines to the San Francisco peninsula, the 32-year-old San Mateo Bridge needs strengthening to withstand a maximum credible earthquake...
Above Them All
The design for what would be the next world's tallest building relies on a 1,550 ft (472 m) high concrete core that will give occupants of the top floors of the building unimpeded...
Protecting Your Work: Balancing the Competing Interests of Ownership
Your firm has invested days, months�perhaps even years�in its latest project. Your staff have poured their thoughts, ideas, and insights into the creation of a bridge, building, overpass,...
New Bern Bypass
To alleviate congestion and offer tourists easier access to their destinations, the North Carolina Department of Transportation decided to reroute U.S. Route 17 out of the historic town...
Casino Connection
New Jersey's $330-million, 2.2 mi (3.5 km) Atlantic City-Brigantine Connector will provide easy access to gambling casinos when it is completed in May 2001 and is one of the...
Fast-Track Funding
The South Carolina Department of Transportation has implemented one of the most innovative highway and bridge construction programs in the United States. With creative financing and contracting,...
Inside Job
River Mill Dam is a large Ambursen (buttress type) dam constructed in 1911 on the Clackamas River in Oregon. The preliminary and final design phase of the seismic upgrade project coincided...
Re-Creating the Rainbow Bridge
A team of American and Chinese experts constructed a pier-free arch bridge in China based only on a 12th century...
High-Performance Hybrid
The Nebraska Department of Roads is taking advantage of the new high-performance steel (HPS) to develop a modular, two-girder bridge that will employ standardized hybrid HPS components,...
Suspension Solution
The new bridge across the Carquinez Strait near San Francisco, California, will upgrade an important transportation link across the Sacramento River. This new bridge, which renders the...
Safety in a Designer's Hands
Although contractors face safety issues every day, engineers and architects have traditionally not addressed construction site safety in project designs. But there are design practices...
Into the Tunnel
Technological advances in wind tunnel testing and computer-aided design programs are enabling engineers to create taller and more aesthetically interesting buildings than ever before....
Digging for Answers (Available in Geoenvironmental Engineering Special Issue only)
Research at the six facilities that make up the National Geotechnical Experimentation Sites (NGES) has included tests on minipiles, groups of driven piles, shafts drilled in rock, and...
Testing the Load (Available in Geoenvironmental Engineering Special Issue only)
The Pittsburgh District of the U.S. Army Corps of Engineers recently began construction of a new gated dam to replace a nearly 100-year-old concrete fixed-crest dam on the Monongahela...
A New Skew
Most bridges that cross roadways or other elements at a skewed angle are designed based on right-angle crossings with inefficient modifications. A new concept for skewed crossings is a...
The Digital Evolution
As designers such as Gehry Architects dream up ever-more fluid and sculptural shapes for buildings, the only way to turn those aesthetic shapes into solid, safe structures is by using...
Taking a New Approach (available in Structural Engineering Special Section only)
The first bridge rehabilitation project in Washington, DC to use the AASHTO Load and Resistant Factor Design (LRFD) specification reveals several lessons to be learned from using the newly...
Tight Squeeze
The Newark, New Jersey Route 21 Viaduct Replacement is a massive, $250 million highway improvement program being undertaken by the New Jersey Department of Transportation. Michael Baker...
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