Span Length

70′ 90′ 110′ 130′ 150′ 170′ 190′ Span Length BT48 70′ - 100′ BT60 85′ - 120′ BT72 100′ - 145′ BT84 125′ - 165′ BT90 165′ - 185′

Section Properties (gross)

Typical Girder Spacing – 5ft through 7ft

Product Name Depth (in) Area (in2) Yb (in4) Ixx (in4) Iyy (in4) PLF @ 165
BT48 48" 557 24.5 177736 32986 640
BT60 60" 629 30.3 308722 33202 722
BT72 72" 701 36.4 484993 33418 805
BT84 84" 773 42.3 711733 33634 888
BT90 90" 971 49.0 1242172 73940 1115

Product Information

Knife River can cast Bulb Tee girders in 48″, 60″, 72″, 84″, 90″ depths, designed for use with a composite concrete field-cast deck

Standard Design Options

  • Skewed Top Flange applications
  • Cast in inserts or hole for diagraph reinforcing
  • Cast in inserts for mounting utility brackets
  • Top flange/web holes for mounting deck forming brackets
Cross-section drawing of an I-beam showing flange and web dimensions with measurement annotations. I-beam cross-section with 300mm height, 150mm flange width, and 100mm flange thickness dimensions. Technical drawing of a wide flange steel I-beam with dimension lines and measurements. Dimensioned cross-section diagram of a structural I-beam measuring 400mm wide by 500mm tall with 20mm flange and web thicknesses, labeled BHIA 20-20. Technical drawing of an I-beam cross-section with dimension lines and specifications. A concrete highway bridge with an adjacent steel truss structure spans over water, with a car driving along the roadway and forested hillsides in the background. Construction worker in hard hat and safety vest stands near an elevated concrete bridge under construction. Two cranes lift long steel girders into place on a bridge construction site, with workers in orange vests and trucks visible below under a clear blue sky. Construction site showing a white flatbed truck carrying a long steel beam, with a yellow crane operating nearby and a forested hillside in the background. Crane lifts concrete bulb tee girder onto highway overpass during construction, with workers on the structure.

3D Viewer

3D Viewer Tools

 

  • 3D Viewer Functions:
  • Move, Span, Zoom Assemblies
  • Isolate Single Components in View
  • Explode Assembly Single Components
  • Use Markup to Sketch Details
  • General Measurements for Concept
  • Print Views

Need More Info?

We Are Here to Help

 

Have a question, need a budget or detailed schedule?  Knife River sales team is ready to discuss precast solutions for your project.  Reach out to our staff below :

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Andy Roberts

Outside Sales, ID & MT

phone

509.904.8610
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Nikolaus Mixon

Outside Sales, OR & CA

phone

541.257.7412
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Alex Sari

Outside Sales, WA & AK

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(509) 992-5614

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