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Deck panels are quickly placed using the traveling screed, which would have been set up anyway to finish the concrete.

Sparkill Viaduct Towers Replaced; Deck Work Underway.

Contractor Harrison & Burrowes has completed the steel towers for this 1200 foot (366 meter) continuous structure carrying State Route 9W through Orangetown, New York, and expects to complete work on the structure by the end of 2002.

Designed by Charles H.Sells,Inc.,at 1200 feet (366 meter) in length without a joint,the project features the longest contin- uous Exodermic deck constructed to date.

Scuppers were fabricated integrally with the grid and both were hot-dip galvanized for long-term corrosion resistance

Let in May of 1999, this project ran into a snag when a decision was made to replace the original tall steel towers rather than to repaint them. Both steel and concrete alternatives were investi- gated, and New York State DOT decided to go with the steel choice. But the long lead time for fabrication of structural steel that is just beginning to ease meant for substantial delays.

An Exodermic deck was chosen for its light weight. With 70 foot (21.4 meter) spans, the reduced dead load of the Exodermic design permitted the use of lighter girders, and the reduced dead load of the superstructure overall made for savings in the redesign of the steel towers.

American Bridge Manufacturing is fabricating the grid panels at their Coraopolis, PA plant, with hot dip galva- nizing by American Galvanizing of Folsom, NJ. Deck panel erection began in April, 2002.

Replacement of the steel towers became necessary after construction began on the 1200 foot viaduct

ExodermicTM is a trademark of Exodermic Bridge Deck, Inc. The bridge deck designs described in this publication are known generically as “unfilled grid decks composite with reinforced con- crete slabs” according to the American Association of State Highway and Transportation Officials (LRFD Bridge Design Specifications).

EXODERMIC BRIDGE DECK, INC. • 60 LONG POND RD, LAKEVILLE, CT 06039 • TEL: 860.435.0300 • FAX: 860.435.4868 • info@exodermic.com


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