Florida's Big Bellies
FPL designed and installed double reverse tapered poles, affectionately called big belly because the width gradually increases toward the middle and narrows at both ends. The poles replace...
Historic Downtown Dilemma (Available only in Structural Engineering special issue)
Many older commercial masonry buildings built of locally quarried stone or fired brick in downtown areas suffer from roof leaks. Because a studwall cavity often is located between the...
Comparison of Blast and Earthquake Effects on Reinforced Concrete Frame Structures
This chapter compares the damage done by an explosive blast and an earthquake....
Evaluating Earthquake Hazards
Earthquake hazards vary considerably in different parts of the country. The effect of an earthquake on telecommunication systems is influenced by the magnitude of the earthquake, the proximity...
Guyed Structures Configurations
This section considers guyed structure configurations, such as single poles or masts, stub poles, H-frames, rigid frames, and masted towers....
Analysis
This section presents theoretical and practical concepts for the analysis of guyed transmission structures. The concepts are further illustrated in the examples of Section 8. The term...
Design
This chapter discusses guyed structure design. Topics include loadings and design restrictions; guy clearances; guy design; guy anchorage; connections; structural design of poles and H-frames;...
Turnback Project Moves Ahead
The $202 million Muni Metro Turnback (MMT) Project, scheduled for completion in September 1996, includes an 840 ft section consisting of twin steel-lined tunnels that connects to the Embarcadero...
Re-engineering Cowboy Heaven (Available only in
On a wooded hill overlooking the north end of Oklahoma City sits one of the foremost repositories of this country's Western heritage, the National Cowboy Hall of Fame. Contained...
Seismic Solutions for Steel Frame Buildings
After the Northridge Earthquake, damage in steel moment resisting frame connections stunned engineers. Now those engineers are scrambling to find and test new kinds of connections. This...
Spotlight on Steel Moment Frames
Engineers' confidence in moment connections was shattered when damage was discovered after the 1994 Northridge earthquake. Such connections are now a hot subject for U.S....
The Timberlake Dam Failure: A Hydrometeorological Assessment
Extremely heavy rainfall over the Timberlake basin in southwest Virginia on 23 June 1995 caused an earthen dam to fail and resulted in fatalities. The meteorological conditions are examined...
Swimming in Style
The Deerfield Academy's new $10 million swimming and squash facility, built in the floodplain of a river, is a jewel-box created from glue-laminated timber, galvanized steel,...
Reinforced Glued Laminated Timber
In record time, reinforced glued laminated timber (glulam) has moved from an experimental product to wide-spread commercial acceptance. Several case studies illustrate applications and...
Marine Borers Are Back
Cleaning up the nation's harbors has brought a resurgence in marine borer activity. These organisms, mainly the teredo and the limnoria, eat at timber piers, undermining critical...
Project Control
The project work plan, as originally written and modified during the course of projects, sets up specific schedule and budget yardsticks; each project task is to be completed in a specific...
The Northridge Fractures: Are We Learning the Right Lessons?
After the Northridge earthquake in January 1994, engineers found problems with special moment-resisting frames. There were multiple facture modes, and typical damage involved primary crack...
Guidelines for Evaluating Aging Penstocks
Northridge Postscript: Lesson on Steel Connections
Immediately after the Northridge earthquake in January 1994, the general concensus was that steel-framed buildings performed extremely well. Later, inspectors were surprised to find weld...
Wood Working
Engineers may be more accustomed to working with concrete and steel, but for certain projects aesthetics, cost or other considerations may make wood the preferred choice. According to...
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