Span Length

60′ 70′ 80′ 90′ 100′ 110′ 120′ Span Length BOX33 60′ - 85′ BOX39 65′ - 95′ BOX42 70′ - 105′ BOX48 85′ - 115′

Section Properties (gross)

Product Name Depth (in) Area (in2) Yb (in4) Ixx (in4) Iyy (in4) PLF @ 165
BOX33 33" 766 16.3 110483 203409 880
BOX39 39" 826 19.3 168706 231700 949
BOX42 42" 856 20.8 202877 243809 983
BOX48 48" 916 23 283292 271669 1052

Product Information

Standard box beam design is typically governed by the State, County or Agency design criteria. In the Pacific Northwest using a nominal 4′ wide box beam at depths of 33″, 39″, 42″ and 48″ provides the most cost effective use of the section.

Standard Design Options

  • Integral precast curb options are available.
  • Slab to Slab connectors: Tie Rods or Weldments
  • Available top of slab finishes: UHPC Driving Surface ready or roughened to receive overlay
  • Rail Post Anchor Connections
  • Utility hangers
  • Integrated abutment and wing wall packages
  • Recesses for bat crevices
Technical drawing of a square steel plate with a hollow rectangular center, showing dimensions in millimeters. Technical drawing of a square hollow section with dimensioned outer and inner dimensions showing wall thickness. Technical cross-section drawing of a rectangular frame with labeled dimensions and a hollow center. Technical drawing of a rectangular concrete block with hollow center, showing dimensions on all sides and a cutaway section. Crane lifts concrete box beam into place as workers build the bridge over a winding river. Crane lifts large concrete box beam with workers and heavy equipment nearby. A yellow construction crane stands on a worksite, positioned over concrete structures under a blue sky with distant mountains. Crane lifts concrete slab at construction site with additional slabs staged on the ground for voided-solid slab installation.

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
Nikolaus Mixon, Outside Sales for Oregon and California at Knife River Prestress.

Nikolaus Mixon

Outside Sales, OR & CA

phone

541.257.7412
Alex Sari, Outside Sales for Washington and Alaska at Knife River Prestress.

Alex Sari

Outside Sales, WA & AK

phone

(509) 992-5614

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