Products & Services
Prestressed Concrete I-Beams
The AASHTO Type VI modified beam shape was the workhorse for long span prestressed concrete bridges until advancements in concrete material properties lead to the more economic Bulb-T beam shape. This AASHTO beam section is still specified on some bridge projects and NPP has committed to maintaining the tooling required to continue to fabricate these beams. Currently the maximum beam length of the AASHTO Type VI (modified) is 165 feet using conventional design.
Please Click the image of the I-Beam for more information.
Span lengths for given beam depths are based on actual beams designed following PennDOT DM-4, 2007. Information is provided as a general guide for selecting beam depths at the preliminary stages of design.