Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Using other design trucks for an LRFD design in MDX

Using other design trucks for an LRFD design in MDX

Using other design trucks for an LRFD design in MDX

I got a memo today from the Oklahoma DOT about this new Type EV3 vehicle. Among other things, the FHWA is requiring them to load rate all new bridges and rehabs with the EV3.

I was looking at MDX and I don't see any way you can use another truck besides the HL-93 for LRFD designs. Yes you can use any permit truck you like, but the permit is only checked for Strength II and it only calculates Operating Rating. I have emailed and called MDX and got no response.

RE: Using other design trucks for an LRFD design in MDX

MDX aside, I seem to recall the FHWA memo says to rate bridges for fire trucks at the Operating Level.

RE: Using other design trucks for an LRFD design in MDX

Bridgebuster you are correct, the rating is at the Operating Level.

I was looking at it this morning, and I can plug in the EV3 as a permit vehicle and use the Service Moment output from MDX to calc the rating.

It might be time to look into LEAP Steel Bridge...

RE: Using other design trucks for an LRFD design in MDX

I believe the EV2 & EV3 trucks, as well as the SU4 through SU7, are included in the truck libraries of WYDOT's BRASS Girder and BRASS Culvert programs. It also has the ability to add custom truck configurations to the library. I've added several trucks and various other loads, such as trackhoes, to my library files, and it was fairly easy.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close