Span Length

15′ 27′ 39′ 51′ 63′ 75′ 87′ Span Length OR 12 15′ - 30′ OR 15 20′ - 40′ OR 18 25′ - 50′ OR 21 30′ - 55′ OR 26 40′ - 70′ OR 30 55′ - 85′

ODOT Section Properties (gross)

ODOT Voided Slab section properties show.  Typical product sections are 4′-0″ wide.

TypeDepth (in)Area (in2)Yb (in4)Ixx (in4)Iyy (in4)PLF @ 165
OR 1212"5765.96833106037661
OR 1515"5697.412741110462653
OR 1818"6288.921585129072721
OR 2121"70310.434097142120807
OR 2626"84612.963587182246972
OR 3030"93114.9973012028541069

Span Length

15′ 25′ 35′ 45′ 55′ 65′ 75′ Span Length WA 12 15′ - 30′ WA 18 30′ - 45′ WA 24 45′ - 65′ WA 26 55′ - 70′ WA 30 60′ - 75′

WSDOT Section Properties (gross)

WSDOT Voided Slab section properties show.  Typical product sections are 4′-0″ wide. WA30 4′-3 3/4″ wide.

TypeDepth (in)Area (in2)Yb (in4)Ixx (in4)Iyy (in4)PLF @ 165
WA 1212"5686.06833106037652
WA 1818"6588.921713136687756
WA 2424"74811.947970168440859
WA 2626"84412.947970186585969
WA 3030"103314.91043231043231168
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Product Information

Standard voided slab design is typically governed by the State, County or Agency design criteria. In the Pacific Northwest using a nominal 4′ wide voided slab for depths up to 30″ provides the most cost effective use of the section.

“OR” – ODOT Sections

“WA” – WSDOT Sections

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Product Information

Standard voided slab design are typically governed by the State, County or Agency design criteria.   In the Pacific Northwest using a nominal 4′ wide voided slab for depths up to 30″ provides the most cost effective use of the section.

“OR” – ODOT Sections

“WA” – WSDOT Sections

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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
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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 :

Image's Andy Roberts

Andy Roberts

Outside Sales, ID & MT

phone

509.904.8610

Image's Nikolaus Mixon

Nikolaus Mixon

Outside Sales, OR

phone

541.257.7412

Image's Alex Sari

Alex Sari

Outside Sales, WA

phone

(509) 992-5614

 linkedin

LinkedIn

Product Family

See featured product related to solid & voided slab assemblies

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AASHTO Girder

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Box Beam

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Bridge Substructure

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Bulb I

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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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Deck Bulb Tee

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Tri-Deck

Tri-Deck girders are an adjustable top flange width, multi-stemmed unit designed for full deck use. Tri-Deck bridges are typically used for bridge spans from 30′-52′ which require a longer span and lower profile section. Typically Tri-Dec...

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WF Girder

The wide flange (WF) girder is the primary bridge girder section used by Washington State Department of Transportation (WSDOT) and Idaho Transportation Department (ITD). WF Girders are typically used in spans of 70-200’ using sections ranging from 36...

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