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

Wall bracing for failing CMU

Wall bracing for failing CMU

Wall bracing for failing CMU

This is a residential building, wood framed on a CMU foundation that is below grade. It has already been determined that cracking in areas of the CMU is due to the foundation wall being inadequate to hold lateral soil pressure from the outside. We plan to solve it use bracing of the type as shown in the attached picture.

What I am looking for is general rule of thumb for sizing the posts (tube dimension, metal thickness) and their spacing relative to one another.


RE: Wall bracing for failing CMU

No rule of thumb---

1. Get rid of any water - drains, pumps, etc.
2. Get rid of any plastic clays
3. Determine soil load.
4. Proceed with design

This is ONLY one of a few ways to solve this problem and probably one of the ugliest...but works quite well - usually.

RE: Wall bracing for failing CMU

wouldnt it just fall under steel design for a beam, since there is no axial load. Spacing determined on how far the cmu could span unreinforced? Generally I have never seen these do anything but bend with the wall.  

RE: Wall bracing for failing CMU

thanks Mike and Zteng...

But I am not an engineer, just a stone mason. So the loads I am happy to calculate if I knew the algorithms to use.

Soil is basically 7ft high on the exterior side.

I plan to excavate along the perimeter (2 ft wide) down to the footing. Install drain tile, and drainage stone for the entire cutout and encapsulate the whole thing in a spun geo-fabric. And there an addition going on adjacent that will tremendously with drainage.

The help I need is with the interior "design" of the posts, in other words spacing of the posts and size and type of posts.

thanks, Steve

RE: Wall bracing for failing CMU

Sorry - call a local structural engineer who can analyze exactly what is going on.

Remote engineering is not only dangerous - but may be illegal in most states...

These forums are just for "bouncing" ideas off of others.   Actual defined answers are seldom offered.. and for good reason.

RE: Wall bracing for failing CMU

Ah, thanks Mike. I never picked up the subtlety of general ideas, versus specifics - and wasn't dialed into the liability issue at all. Nonetheless, still a good forum. -Steve

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


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
White Paper - Industry 4.0 and the Future of Engineering Education
With industries becoming more automated, more tech-driven and more complex, engineers need to keep their skills and knowledge up to date in order to stay on top of this wave—and to be prepared for the Industry 4.0 future. The University of Cincinnati offers two online Master of Engineering degree programs designed specifically for practicing engineers. Download Now
White Paper - Comparing Multi-Patterning at 5nm: SADP, SAQP, and SALELE
Self-aligned multi-patterning techniques such as SADP, SAQP, and SALELE are increasingly popular at advanced nodes, but each process has its pros and cons. IMEC and Mentor, a Siemens business collaborated to identify potentially less-obvious process and design limitations and trade-offs between the three SAMP techniques. Learn more in this paper. 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