SMDI Publishes Guide Specification for Highway Bridge Fabrication With High Performance Steel (HPS 100W)

WASHINGTON, D.C., December 21, 2012 – The Steel Market Development Institute (SMDI), a business unit of the American Iron and Steel Institute (AISI), has published the Guide Specification for Highway Bridge Fabrication with HPS 100W (HPS 690W) Steel for Non-Fracture Critical Applications, which is available for free download (click here).  This document provides bridge owners, designers and fabricators with the latest recommended methodology to fabricate and weld structures using ASTM A709 or AASHTO M270, Grade HPS 100W (HPS 690W) steel. 

The guide is based on continued research with High Performance Steel (HPS) fabrication and welding practices conducted under a cooperative agreement sponsored by the Federal Highway Administration, the U.S. Navy, and SMDI.  Based on research, the guide includes certain consumables for the submerged arc welding (SAW), shielded metal arc welding (SMAW), flux cored arc welding (FCAW), and gas metal arc welding (GMAW) processes. It is highly recommended for bridge professionals who currently work with steel or are interested in learning more about HPS bridges.

The research is overseen by SMDI’s Bridge Steel Steering Committee and the Welding Advisory Group, made up of nationally recognized experts that include steel plate manufacturers, welding consumable manufacturers, steel bridge fabricators, bridge owners, industry, academia and other experts.

High Performance Steel made a rapid entry into the bridge industry. The first HPS 70W bridge was placed in service in December 1997, only three years after the onset of the cooperative research effort. Today, it is estimated that there are more than 450 HPS bridges in service in 44 states.  

The Steel Market Development Institute (SMDI) grows and maintains the use of steel through strategies that promote cost-effective solutions in the automotive, construction and container markets, as well as for new growth opportunities in emerging steel markets.  For more news or information, visit

SMDI’s steel bridge program is conducted under the Construction Market Council of the Steel Market Development Institute. The investor companies of the Construction Market Council include:

• AK Steel Corporation
• ArcelorMittal Dofasco
• ArcelorMittal USA LLC
• EVRAZ North America
• Gerdau Long Steel North America
• Nucor Corporation
• Severstal North America, Inc.
• SSAB Americas
• Steelscape, Inc.
• ThyssenKrupp Steel USA, LLC
• United States Steel Corporation
• USS-POSCO Industries

Debbie Bennett
Manager, SMDI and Construction Communications
Steel Market Development Institute
Tel: 202.452.7179

Dianne Newton-Shaw
The Placemaking Group
Tel: 510.835.7900 Ext. 206