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

Definition of concrete detailing acronym

Definition of concrete detailing acronym

Definition of concrete detailing acronym

I am analyzing an existing concrete floor for new floor loads.  I have the drawings, but I am not famaliar with some of the acronyms used on the drawings.  The drawings are from 1969.  I am looking at a three-span cast-in-place concrete strucutral slab and trying to determine the frequency of slab renforcing.  On the plan view of the drawing it shows that some of the reinforcing is bent between zones of negative and positive bending; below this it shows that there is bottom reinforcing in each span.  This reinforcing is labeled #6 @ 5" o.c. O.A.B.U. (or Q.A.B.U or maybe B.A.B.U).  In another area of the floor the reinforcing is labeled #6 @ 4" o.c. I.S.A.B.U.  Does anyone know what these acronyms stand for?  I think it has something to do with how many bars are bent between the top and bottom of the slab, but I don't know for sure.  Thanks


RE: Definition of concrete detailing acronym

Are the reinforcing bars labeled  #6@5" perpendicular to the ones labeled #6@4"?  Because then the "O" and the "I" could stand for "outside" and "inside."  I'm not sure what the "A" stands for.  Perhaps the "B.U." stands for "bent up."  Hope this helps.

RE: Definition of concrete detailing acronym

The #6@5" and the #6@4" are not perpendicular to one another.  There are two different conditions in the slab that they detailed a slab A and a slab B.  In both cases the reinforcing is primary reinforcing.  I am thinking it is suppose to read B.A.B.U. and means "bend alternating bars up" or "bend all bars up," but there is a big difference between those two.

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


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