PaintSquare.com
      | Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise
  

 

Download our free ebook on Advances in Corrosion Control Coating Technology

Paint and Coatings Industry News

Main News Page


PA Limits Weight on 1,000 Bridges

Wednesday, August 28, 2013

More items for Health & Safety

Comment | More

Struggling to manage the third-largest number of structurally deficient bridges in the nation, Pennsylvania's Department of Transportation has announced plans to impose new "risk-based weight restrictions" on 1,000 bridges statewide.

PennDOT said the new limits were needed "to preserve bridge safety" on its "aging, heavily used system" of 25,000 state-owned and 6,000 locally owned bridges. Some of the weight limits are new; others are further reductions of existing limits.

Weight restrictions are already in effect for 567 state-owned and 1,600 locally owned bridges in Pennsylvania, and 242 bridges (42 state owned; 200 locally owned) have been closed, according to a PennDOT presentation on the problem.

Liberty Bridge
Wikimedia Commons / Scillystuff

The Liberty Bridge (second from foreground) in Pittsburgh is one of 1,000 bridges across Pennsylvania with new weight restrictions. The bridge is nearly 90 years old.

The average age of the state-owned bridges is 51 years, and the state has the eighth most heavily traveled interstates in the nation, PennDOT said.

Deficiency and Safety

PennDOT notes that a rating of structural deficiency "does not mean that a bridge is unsafe," but does reflect "deterioration to one or more of its major components."

Safety is our number-one priority and if a bridge is found to be unsafe, it's closed," the agency said in announcing the limits. "If a bridge can only carry certain loads, it's restricted."

The restrictions follow criteria established by the American Association of State Highway Transportation Officials (AASHTO). PennDot notes that "bridges are designed to carry loads above the weights of fully loaded tractor trailers (80,000) pounds."

AASHTO's criteria assigns weight limits ranging from where that so-called factor of safety begins to decline down to where the structure has lost about half of its factor of safety.

PennDOT Chart
PennDOT

If Pennsylvania followed more stringent load criteria used by other states, thousands more bridges would be restricted, PennDOT said.

If Pennsylvania followed more stringent criteria used by other states, including Delaware and Connecticut, the state would have restrictions on thousands more bridges, PennDOT said.

Funding Cited

PennDOT blamed lack of financial resources for the weight restrictions, although it also released figures showing that the percentage of structurally deficient state-owned bridges was at its lowest point in a decade.

In 2003, 22 percent of state-owned bridges were classified as structurally deficient; in 2008, nearly 24 percent. Currently, about 17.5 percent of Pennsylvania's bridges carry that label, but the figure is projected to climb.

Without additional funding for maintenance, PennDOT says, about 300 additional bridges each year will become structurally deficient.

PennDOT chart
PennDOT

PennDOT said the new and additional weight restrictions were required by cutbacks in funding.

Meanwhile, the agency says, about 24 percent of the state's highway miles are considered in poor condition—a figure expected to top 35 percent within 10 years.

Bridges Listed

The bridges affected by the new restrictions range from small creek crossings to large structures that span rivers. Most of the bridges on the list are less than 100 feet long.

Larger bridges include the Liberty Bridge, which crosses the Monongahela River in Pittsburgh; and a span that carries State Route 62 over the Allegheny River in Forest County.

The Liberty Bridge was completed in 1928. The National Bridge Inventory reports that the deck, superstructure and substructure of the SR 62 Bridge are all considered Poor (each rating a 4 on a scale of 1 to 9).

A full list of bridges affected by load restrictions is available here. Approximate vehicle weights are available here.

   

Tagged categories: Bridges; Construction; Government; Health and safety; Infrastructure; Maintenance programs

Comment Join the Conversation:

Sign in to our community to add your comments.

Bullard

The Next Generation
of Blasting

• Lightest
• Coolest
• Most Comfortable
• Most Dependable


RPB Respiratory
GET A FREE COOL TUBE

Take advantage of RPB Safety’s coolest promotion yet! Throughout the entire month of May you will receive a free Cool Tube with every...


Clemco Industries Corp.
Powerful Protection in a Small Package

Mounts inside blast helmet, alerts operator to dangerous breathing-air condition by audible, visual, and vibratory alarms. Easily calibrated, battery operated.


Blastox/The TDJ Group, Inc.
Blastox - One Step
Lead Abatement

Don't waste $$ on added labor steps with other methods. Don't mix, meter or apply at the job-site. Avoid strict hazardous waste rules.
Let your painters paint!


CS Unitec
Surface Prep & Material Removal

CS Unitec’s Floor Planers remove coatings & corrosion from concrete & metal surfaces. Produce keyed profiles for waterproofing applications. info@csunitec.com


Termarust Technologies
Termarust (HR CSA) Chemically Stops
Active Corrosion

Truss bridge treated in 2000 with Termarust's (HR CSA) field-proven rust mitigation system chemically stopped corrosion, crevice corrosion & pack rust.


Wasser High-Tech Coatings Inc.
Wasser Coatings Protect

Wasser Coatings offer a complete range of Moisture Cure Urethane (NEPCOAT approved) systems in addition to Polyurea membranes and linings(NSF).
www.wassercoatings.com


U.S. Zinc
Historic Reliability. Innovative Performance.

The reliable protection properties of our zinc dust help combat deterioration and corrosion in your paints and coatings. U.S. Zinc - Helping the world work™


Absolute Equipment/Grand Rental Station
Portable Power from Absolute Equipment

•Compressors
•Lighting Systems
•Generators
•Light Compaction
Sales • Rental • Service
Call 1-866-931-6655
Over a century of
providing excellence.

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us
 

© Copyright 2000-2015, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com