For the Federal Highway Administration's (FHWA) explanation of what makes a bridge structurally deficient and how a bridge becomes functionally obsolete, go to www.fhwa.dot.gov/
policy/2008cpr/chap3.htm#7. Better Roads' editorial staff would like to thank all of the state
highway engineers for their continuing cooperation and special effort to provide current data.
The data was collected through October 2013. FHWA, in consultation with the states, has assigned a sufficiency rating to each bridge (20 feet or more) that is inventoried.
Fracture
Critical
Combined Total All Bridges
Total
Bridges
Total
FO
%
Total
SD
%
Total
SD/FO
BRIDGE CROSSINGS
NON-CONDUCTIVE PIPE ROLLERS
%
Total
Prevent the passing
of current from
the pipeline to
bridge structure,
rebars, etc.
%
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Maintain same support strength of pipe hanger system.
Eliminate chafing and rusting pipe caused by iron rolls.
Eliminate electrical grounding of the pipeline to the bridge.
Eliminate insulating joints at each end of bridge, and
include the suspended line as part of a cathodically
protected pipeline, i.e. continuity of cathodic protection.
Absorb vibration from traffice or other sources, saving wear
and tear on pipe hanger parts.
Highest specification polyurethane compound is cast
around an integral steel sleeve to form a full length bearing
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Direct replacement for cast iron roll.
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Westtown, PA 19395
Fax 610-344-7519
LB&A, INC.
610-696-9220
ncroll.com
Quality Assessment
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by the Foundation Testing Experts
Pile Driving Monitoring
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Dynamic Load Testing
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Cross Hole Sonic Logging
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............. 216.831.6131
California .................... 323.441.0965
Colorado .................... 303.666.6127
Florida ........................ 407.826.9539
Illinois ......................... 847.221.2750
Louisiana.................... 985.640.7961
North Carolina............ 704.593.0992
Ohio ............................ 216.831.6131
Pennsylvania.............. 610.459.0278
www.GRLengineers.com
info@GRLengineers.com
Data compiled by Linda Hapner
Better Roads November 2013 15
