×
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

Rebar

Rebar

(OP)
Is there somewhere in the code that allows you to use a larger size rebar then shows on design drawings, if so where is that located?

RE: Rebar

I don't believe you can just randomly substitute larger bars.

If you are substituting larger bars, but fewer, to provide the same area of steel, then the main problem from this would be the required development lengths and splice lengths required in the structure.

If you are substituting just higher bar sizes (same number of bars) you increase the area of steel and run the risk of creating over-reinforced members, which can be a bad situation with abrupt failures.

RE: Rebar

The answer you seek is "no".
Flexural members (Beams, beam-columns) are designed to fail when the reinforcement yields and provides warning in the form of crack widening before the concrete on the compression side reaches compression/brittle failure. Increasing the amount of reinforcement risks failing the member suddenly in compression.
A set of construction documents go together, and once sealed and permit is issued, the structure is to be build to plan. Changes have to go through a process of review to assure such problems are unlikely.

That said, there are many conditions and cases where such a substitute should be acceptable, but only after review by the engineer of record.

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