Look for our new and improved web- site in the fall of 2002
A new version of the Exodermic Handbook will be published this fall. It will highlight the “revised” Exodermic design, and will provide extensive details, design information, design examples, and much more. Everyone on our mailing list will receive a notice when the new manual is available.
In the mean time, we are glad to pro- vide a suggested deck design, with appropriate details and calculations for a specific project. Many details are now available in AutoCAD and Microstation formats. Please call, write, fax, or e-mail us and we’ll be glad to help.
LRFD and Metric information
LRFD and metric supplements will be published later this year. An LRFD design methodology is in place, and many details are already available with metric dimensions. Please contact us if you need specific information.
Recent and Upcoming Journal Articles
Dr. Christopher Higgins of Oregon State University has written (and contin- ues to write) a number of articles cover- ing various aspects of Exodermic bridge deck design. His paper (with Heath Mitchell) “Behavior of Composite Bridge Decks with Alternate Shear Connectors” was rated very highly by reviewers and appeared in the January/February 2001 edition of the Journal of Bridge Engineering (ASCE). Reprints are avail- able from Exodermic Bridge Deck, Inc.
Dr. Higgins’ paper,“LRFD Orthotropic Plate Model for Determining Live Load Moments in Filled Grid Decks” has been favorably reviewed and accepted for publication in
Static and fatigue testing at Clarkson University demonstrated that the revised Exodermic design is ful y composite at well above service levels of live load (four times HS-20)
the Journal of Bridge Engineering, and should appear later this year.
Other papers that Dr. Higgins has submitted for publication and are cur- rently under review include “LRFD Compatible Orthotropic Plate Model for Estimating Deflections in Concrete Filled Grid Bridge Decks” and “Behavior of Shallow-Depth Composite Beams with Alternative Shear Connectors” (with Heath Mitchell).
According to Dr. Higgins, the moment and deflection papers are broadly applicable, and apply to many different deck types including Exodermic decks.
John Ahlskog, Consulting Bridge Engineer, has written a paper,“Vibration and Deflection Criteria for Lightweight Decks Designed Using the LRFD Code” which indicates that the familiar stan- dards of L/800 and L/1000 are appropri- ate for lightweight bridge decks in order to provide a ride quality comfortable to bridge users. For these deck types, static deflection is a simple proxy for accelera- tion, which is what actually influences user comfort. This paper is being sub- mitted for publication.
Oregon – Speed of construction as well as weight savings drove the deci- sion by engineers at Oregon’s Department of Transportation to specify an Exodermic deck for the Mill Creek Bridge. Located on the Warm Springs Indian Reservation in north central Oregon, deck replace- ment on the 535 foot (163 meter) deck truss took place during four weekday closings this spring, avoiding weekend and the main summer sea- son for the nearby casino. Contractor Hamilton Construction precast the deck panels on site, using steel grid panels fabricated by Exodermic licensee L.B. Foster Company.
Louisiana – Consultants at PEN- SCO have designed an unusual lift span for the Vermilion River Bridge, part of the new extension of Camellia Boulevard in Lafayette. The 85 ft. x 51 ft. (26 x 16 meter) bridge is actual- ly a “lift out” span, and is designed to be raised by four cranes, one per cor- ner, for the rare event when bridge traffic requires additional clearance. PENSCO selected an Exodermic deck for its light weight, critical on mov- able structures. Construction of the bridge is expected to be completed by the end of 2002, using steel grid pan- els supplied by L.B. Foster.
Massachusetts – As successful bidder on the rehabilitation of the South End Bridge over the Connecticut River between Agawam and Springfield, Cianbro Corporation is engaged in their third Exodermic deck project in three years. In addition to many repairs on the structure, one span is being replaced using precast Exodermic deck panels supplied by L.B. Foster., with all work being done at night. The schedule is a tight one, as traffic demands on the bridge are high during the prime construction season due to the proximity of the Six Flags New England amusement park.
Call or write for more information and be sure to visit our web site at www.exodermic.com
The information provided herein was prepared with reference to generally accepted engineering practices. It is the responsibility of the user of this information to independently verify such information and determine its applicability to any particular project or application. EBDI assumes no liability for use of any information contained herein. While Exodermic design is covered by US and Canadian patents (US: 4.531,857; 4,531,859; 4,780,021; 4,865,486; 5,509,243; 5,664,378. Canadian: 1,218,551; 1,286,137; 1,299,418), with additional US and international patents issued or pending, its availability from multiple, independent, licensed suppliers allows it to be considered ‘generic’ in most jurisdictions.
EXODERMIC BRIDGE DECK, INC. • 60 LONG POND RD, LAKEVILLE, CT 06039 • TEL: 860.435.0300 • FAX: 860.435.4868 • firstname.lastname@example.org
2002 Exodermic Bridge Deck, Inc.