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.

Type Depth (in) Area (in2) Yb (in4) Ixx (in4) Iyy (in4) PLF @ 165
OR 12 12" 576 5.9 6833 106037 661
OR 15 15" 569 7.4 12741 110462 653
OR 18 18" 628 8.9 21585 129072 721
OR 21 21" 703 10.4 34097 142120 807
OR 26 26" 846 12.9 63587 182246 972
OR 30 30" 931 14.9 97301 202854 1069

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.

Type Depth (in) Area (in2) Yb (in4) Ixx (in4) Iyy (in4) PLF @ 165
WA 12 12" 568 6.0 6833 106037 652
WA 18 18" 658 8.9 21713 136687 756
WA 24 24" 748 11.9 47970 168440 859
WA 26 26" 844 12.9 47970 186585 969
WA 30 30" 1033 14.9 104323 104323 1168
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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 Eric Holje

Eric Holje

Bridge Estimator

phone

(509) 536-3323

 linkedin

LinkedIn
Image's Sam Jewell

Sam Jewell

Outside Sales Representative

phone

(541) 221-8599

 linkedin

LinkedIn

Product Family

See featured product related to solid & voided slab assemblies

All Products

AASHTO Girder

AASHTO sections are typically used for railroad, or other private entity, bridge construction when a standard wide flange (WF) girder section does not meet the project design criteria.  The top flange of AASHTO shaped girders is not as wide as standa...

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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 ...

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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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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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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

Deck Bulb Tee Girders integrate a precast deck with a traditional I-Girder design. Deck Bulb Tee Girders provide the advantage of having an immediate driving surface or a roughened surface allowing for a secondary overlay or CIP deck to be added in t...

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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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