×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

CMU stacked bond

CMU stacked bond

CMU stacked bond

(OP)
I am working through the analysis of a two-story building where the architect has specified stacked bond (in lieu of normal running bond) for the cmu walls.  I know about the increased horizontal reinforcement requirements in the cmu, but am having trouble locating how out-of-plane flexural design is affected.

Can anyone provide additional insight?

RE: CMU stacked bond

With running bond CMU and out-of-plane bending, you can space out your rebar and utilize a width of the face shell as a flange...sort of like designing a T beam with the core and web shells serving as the main body of the "beam" and the face shell on the compression side serving as the flange.

ACI 530 and other specs dictate how wide that flange width can be.

With stack bond, you have vertical joints every 16" (+/- depending on the actual block you use - but most are 16").  This creates a slip plane that limits the flange width to the 16".  This will affect your design for flexure.  For shear you still rely on the web core fully grouted.

For shearwalls (in-plane shear) there are also reductions in strength.

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!


Resources