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
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 vertical curves. Allows girders to be placed closer together for major skews and difficult on site deck pours. Typical users of the design include:
Washington Department of Transportation (WSDOT), Oregon Department of Transportation (ODOT), Idaho Transportation Department (ITD), Montana Department of Transportation (MTD), Alaska Department of Transportation (ADOT), United States Forest Service (USFS)
The Bulb I (BI) girder is a standard variation of the Bulb-T girder. Use the BI shape only when it has benefits over a Bulb-T girder. Since the BI girder have a narrower top flange, it requires less concrete build-up than a Bulb-T. Therefore bridges with high super elevations (generally, greater than 7%) may want to consider the BI girder.
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
Sam Jewell
Outside Sales Representative