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...
Stress Ribbon Bridge in Freiburg, Germany
A three span continuous stress ribbon bridge of 75, 130, and 138 ft, was built in downtown Freiburg, W. Germany, for pedestrian traffic. Structural analysis is similar to that of suspension...
ASCE Tackles Standards
ASCE is sharply expanding its standards activity. Standards committees are at work in the fields of building loads, fire safety of structures, steel box-girder bridges, nuclear power plants...
First Bridge Across the Yukon River
Until recently, the Yukon River was a major obstacle in constructing a roadway to the oil-rich North Slope of Alaska. But on October 10, 1975, that obstacle was hurdled when the first...
Impermeable Asphaltic Concrete Pond Liner
An impermeable dense hydraulic asphaltic concrete solar evaporation pond liner was developed by the Southern California Edison Co. for the Mohave Generating Station, Clark Co., Nevada....
City's Topographic Mapping System Saves Time, Money and is More Accurate
The city of Elgin, Ill. purchased its own topographic mapping system called Topo-Plan. The system consists of an aerial photo base map plus a transparent overlay showing 2-ft (0.60-m)...
Highway Fill�� A Broad-Crested Weir
Hurricane Agnes in June, l972, destroyed the bridge over the Middle Patuxent River in Maryland which had suffered damages from several other storms. Replacement costs had to be kept low...
Falsework Eliminated in Bridge Erection
The U.S. Highway 50 bridge just east of North Vernon, Ind., is one of the first applications in this country of the precast, prestressed concrete box girder design erected without falsework....
Methods of Structural Analysis
Proceedings of the National Structural Engineering Conference, Methods of Structural Analysis, an ASCE Structural Division Specialty Conference held at the University of Wisconsin, Madison,...
American Wooden Bridges
Wooden bridges are inimitably American. Their practicality, individuality, and ruggedness are traditional characteristics associated with our country. This publication catalogues some...
Pipeline Bridge Uses Timber Arches
An arch bridge is utilized for the purpose of providing a river crossing for a water supply pipe. Tidal influence, an unfavorable riverbed situation complicated by estuarial and other...
Frost Heaves�� A Major Dilemma for Ice Arenas
The ice sheets of three arenas in Minneapolis-St. Paul have had frost heaves ranging from seven to eleven inches (0.2 to 0.3 m). Proper design should prevent frost from penetrating the...
Learn From Biographies of Early Engineers
The aim of education is to discover, develop and finally, to apply the student's latent abilities. To accomplish these things, the student first needs to try his hand and...
Germany Constructs Steel Box Girder Landmark
The designer of a steel hollow box girder bridge in West Germany describes the design process and gives some construction details. Longest possible spans were sought because of environmental...
Civil Engineering History Gives Valuable Lessons
Many students, and others, feel the study of engineering history is a frill. Not so, this article suggests. A study of the past can give an engineer better ideas on how to solve a new...
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...
Reinforced Earth Bridges Highway Sinkhole
Faced with an unusual sinkhole condition, the Pennsylvania Department of Transportation decided to utilize a two-way reinforced earth slab in conjunction with a subsurface grouting program...
Engineering Education: Can It be More Practical�
U.S. engineering schools were derailed after World War II by some well-meaning educators who decided future engineers should be patterned after physicists and aero-space scientists. Post-war...
ASCE Minority Group Counseling Under Way
ASCE has been touring the nation's secondary schools, telling minority youths about the field of engineering and advising young people on courses of study. In 1970, only about...
News in Bridge Decks
This is the second of two articles on short span bridges. The first, in the July issue, described cost-cutting ideas in design. This article focuses on bridge decks: expansion joints,...
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