×
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

Interaction Diagram for 12"CMU

Interaction Diagram for 12"CMU

Interaction Diagram for 12"CMU

(OP)
Where can I find interaction diagram for 12" CMU wall. I was looking at NCMA TEK and found TEK 14-5A that is for 8" CMU walls. Any idea how can I find the same tables for 12"CMU?
Thanks

RE: Interaction Diagram for 12"CMU

If you wanted it is not incredibly difficult to create one for yourself in any spreadsheet program. If you have ever done the calculations by hand then it takes no longer than running the hand calcs in full.

The best part is you can input different rebar specs into your spreadsheet and it will recalculate the interaction diagram.

RE: Interaction Diagram for 12"CMU

The reason you only can find 8" walls is that the 8" walls and structures are general standard for in masonry industry globally. The second most common wall thickness are 6" and 12" for high performance walls. The 28 story Excalibur in Las Vegas was 8" for 26 of the 28 floors with the lower two floors 12" because of the larger open areas. Buildings with 6" partially reinforced 6" walls designed under ACI 530 are very common for buildings internationally up to 22 stories.

Often, the published diagrams are used as supporting material for designs, so it is a liability situation.

Creating something like a very wide application document for all conditions is a major undertaking especially with keeping it current to the new changes in the code standards and changes. Fortunately, the NCMA TEKs are written by the same people that do much of the codes, material standards and and documenting for the writing of the codes. The original ACI 530-02 was written using a 15 year old design standard and incorporating all research as support for the final document that was not legally published in 2002.

Industry references and codes are a true example of documentation for use in a "belt and suspenders" standard that mat be used properly or very irresponsibly. Codes and standards are just as slow to change. I can remember being on am ASTM material committee after 10 years of waiting to be a voting member and working for 5 years on a new material standard.

Dick

Engineer and international traveler interested in construction techniques, problems and proper design.

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