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!
  • Students Click Here

*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

TXC/DDS and the friction angle

TXC/DDS and the friction angle

TXC/DDS and the friction angle

Just to vent. . .

Both ASTM standards for triaxial testing and drained direct shear testing cite the interpretation of friction angle and cohesion as outside the standards (i.e., the're professional services). I'm always receiving laboratory certificates (i.e., non-professional documents) that show friction angle and cohesion values as interpreted from the lab's computer.

How do I process such professional interpretation in a non-professional document?

I don't. I will not allow an engineer to co-opt the lab's value. I'm almost to the point where I'm going to require a PE stamp on these certificates.

Not to be a pedant, that is. . .


ípapß gordo ainÆt no madre flaca!

RE: TXC/DDS and the friction angle

We provide cursory interpretations on our reports but they include a disclaimer-the results must be reviewed by a professional engineer.

RE: TXC/DDS and the friction angle

IMHO,At the end the PE is the one who uses the data provided by the lab, so the PE is totally responsible of the numbers used in the calculations for recommendations . The PE can or cannot use the numbers provided by the lab.

RE: TXC/DDS and the friction angle

I understand, Okiryu. Unfortunately, in typical instances, the geotechnical report just co-opts the lab's published value without any claims on strain compatibility, failure, stress, etc. It's as if, the friction angle is a unique thing that's determined by the lab.

Rant over. . .


ípapß gordo ainÆt no madre flaca!

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


White Paper - What is Generative Design and Why Do You Need It?
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
eBook - Simulation-Driven Design with SOLIDWORKS
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, we’ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. Download Now
eBook - Integrating the Engineering Ecosystem
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. 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