Box Beam

Box Beams are typically used for 80′-118′ bridge spans. The design allows for a typical 4′ width section to include integral voids which reduce the product weight and are often used when box depth and speed of construction are part of the design criteria. Placed side by side at the jobsite, these sections are bolted or welded together, the shear key between the sections is grouted and then can be ready for traffic or an overlay.

Span Length

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

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 :

Eric Holje

Bridge Estimator

[email protected]

(509) 536-3323

Sam Jewell

Outside Sales Representative

[email protected]

(541) 221-8599

Product Family

See featured product related to Box Beam assemblies

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Tri-Deck

Voided-Solid Slabs

WF Girder

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