Revit and Dynamo help design first-of-its-kind arch bridge in California

by: Teresa Elliott | 09/29/2015
Estimated Reading time: 3 - 5 minutes

Project: Sixth Street Viaduct

City of Los Angeles Bureau of Engineering and HNTB Corporation 

Los Angeles River and 6th Street Bridge

Los Angeles River and 6th Street Bridge, a landmark for the city and world famous from its role in television and movies. Learn more at

A bridge that has emotional connections with public

What do you do when you are assigned a design and construction project involving the replacement of a local landmark?  It becomes paramount to communicate to the public that the piece of infrastructure they are getting as a replacement not only will be equal to the existing landmark, but also will go beyond in its ability to serve the public with greater safety and as a recreational amenity.  The 3rd place winner of the 2015 Excellence in Infrastructure competition experienced this and here is their story.

Spanning the Los Angeles River, the Sixth Street Viaduct is one of America’s most iconic bridges, having appeared in more than two dozen films. A chemical reaction taking place in the cement used to construct the bridge makes it vulnerable to earthquakes, and therefore it must be replaced. The City of Los Angeles decided the much-loved structure needed a worthy—and equally striking—replacement. The new bridge, designed by structural engineer, Ted Zoli, and architect, Michael Maltzan, will feature multiple arches and a distinctive lighting system that maximizes light coverage and minimizes glare and shadows. The city tapped HNTB to provide the executive architectural and engineering services required to realize the team’s vision. Learn more in this New 6th Street Viaduct is a bridge to a different future in the LA Times.

bridge-design_6th Street Viaduct_Boyle

HNTB wins 3rd place in the Autodesk 2015 Excellence in Infrastructure competition for the Sixth Street Viaduct Project

The Six Street Viaduct will be the first bridge in California to rely on continuous un-braced tied network arches as a structural system. Each arch will be supported by columns set on their own isolation bearings, which will greatly enhance seismic performance. HNTB realized that the complexity of the bridge would require sophisticated analysis and simulation along with accurate visualization. Given the demands of the project, the design team chose to employ a model-based workflow and a Building Information Modeling (BIM) process from the earliest stages of the project. With the initial models developed in Autodesk Revit, the team decided to enhance its ability to model the geometry of the bridge with Autodesk Dynamo Studio. Dynamo helped the team control and understand the parameters of the bridge. Throughout the process, the team was able to analyze the complex forms and unique shapes called for in the design for aesthetic effect, structural loads, wind loads, drainage, and more.

brige-design_6th Street Viaduct_Aerial-smaller

About HNTB

HNTB Corporation is an employee-owned infrastructure firm serving public and private owners and contractors. With more than a century of service in the United States, HNTB understands the life cycle of infrastructure and addresses clients’ most complex technical, financial and operational challenges. Professionals nationwide deliver a full range of infrastructure-related services, including award-winning planning, design, program management and construction management. For more information, visit

Rate this post:
1 Star2 Stars3 Stars4 Stars5 Stars (4 votes, average: 4.75 out of 5)


this is very good, you can guide me or videos to guide you about that (Revit and Dynamo), but the internal force it to calculate what software you use?

You send mail to me with it? (Mail:


  1. billige nike jordan esterno low fat

    Itˇs actually a great and useful piece of info. I am glad that you shared this useful information with us. Please stay us up to date like this. Thank you for sharing.

  2. Nike max air says:

    Nike max air

    Thank you for the sensible critique. Me & my neighbor were just preparing to do a little research on this. We got a grab a book from our area library but I think I learned more from this post. I am very glad to see such great info being shared freely o…

  3. nike air max 97

    Good article and right to the point. I don’t know if this is really the best place to ask but do you people have any ideea where to employ some professional writers? Thanks in advance 🙂

  4. isabel marant outlet

    I am genuinely delighted to read this blog posts which carries plenty of useful information, thanks for providing such information.

  5. Bañadores Calvin Klein Hombre

    Wow! This can be one particular of the most useful blogs We have ever arrive across on this subject. Basically Wonderful. I’m also an expert in this topic so I can understand your effort.

  6. アシックス スパイク オーダー

    Good  I should definitely pronounce, impressed with your site. I had no trouble navigating through all tabs and related info ended up being truly simple to do to access. I recently found what I hoped for before you know it at all. Reasonably unusual.…

  7. ナイキ オレンジ スニーカー

    I will right away take hold of your rss as I can not find your e-mail subscription hyperlink or e-newsletter service. Do you have any? Please allow me understand in order that I may just subscribe. Thanks.

  8. アシックス イチロー

    Heya i am for the first time here. I came across this board and I find It truly useful & it helped me out much. I hope to give something back and help others like you aided me.

  9. ナイキ フリー メンズ

    My brother suggested I might like this website. He was entirely right. This post truly made my day. You cann’t imagine simply how much time I had spent for this information! Thanks!

  10. billige nike jordan 050608

    Peculiar article, just what I wanted to find.