A steel girder being lifted by cranes during bridge construction at the UPRR (Chemult) Bridge site, with a forested landscape and highway in the background.
Construction workers in safety vests and hard hats guide crane-lifted concrete beams during bridge construction against a forested backdrop. Crane operators lift a large concrete bridge girder into place at a construction site surrounded by pine forest. Crane lowers a steel bridge girder onto concrete supports during highway construction with workers and pine forest in the background.
Construction workers in safety vests and hard hats guide crane-lifted concrete beams during bridge construction against a forested backdrop. Crane operators lift a large concrete bridge girder into place at a construction site surrounded by pine forest. Crane lowers a steel bridge girder onto concrete supports during highway construction with workers and pine forest in the background.

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Knife River specializes in high-strength, super-performing concrete products, from architectural features in various colors and textures to custom bridge options, railroad bridges, and graphic content patented technology that creates images on concrete. View our featured products here.

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Deck Bulb Tee

Deck Bulb Tee Girders combine a precast deck with the traditional I-Girder design. This design offers the advantage of an immediate driving surface, or alternatively, a roughened surface that allows for the addition of a secondary overlay or a Cast-I...

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Deck bulb tee: a steel structural component with a top flange, tapered stem, and bulb-shaped foot.

Bridge Substructure

Accelerated Bridge Construction utilizes precast bridge substructure products. Total precast abutments, bent caps, pile caps and wingwalls offer many advantages. They can be precast to precise specifications of the design in a plant controlled settin...

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Tapered single-cell box girder cross section showing the narrowed lower portion connecting to the pier.

Bulb T

The Oregon Bulb-Tee (BT) girder is the preferred choice for most Oregon medium to long span bridges requiring a CIP deck. Bulb Tee precast/prestressed girders are typically used in spans from 60-185′ with significant loading.

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Bold black uppercase serif letterform T on a white background.

Bulb I

The Bulb I (BI51, BI63 and BI75) is a less commonly used ODOT standard girder for medium to long length span bridges. It utilizes the BT section with the deck blocked in to achieve difficult site requirements such as heavy super elevations and vertic...

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A black I-beam cross-section shape on a white background, representing a structural steel beam used in construction.