×
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

Reinforcing Steel Laps

Reinforcing Steel Laps

Reinforcing Steel Laps

(OP)
Looking for a few opinions.  I am building a pylon, with reinforcing steel, predominantly bundled bars, ranging from No. 9 to No. 14.  With the exception of the No. 14 bars, I would like to lap, instead of mechanically coupling, the reinforcing steel.  Some have advised me that the laps must be staggered at least 24 inches, other have told me the laps must be staggered the length of the lap.  Is there an industry standard?  Code stipulation?   

RE: Reinforcing Steel Laps

Yes, it's a code stipulation. Check AASHTO "Splices of Reinforcement"

RE: Reinforcing Steel Laps

Park and Paulay in their classic "Reinforced Concrete Structures" textbook recommend to stagger lap splices 0.5 or 2.0 of splice length to reduce cracking. 1.0 splice length stagger is specifically criticised and not recommended. It makes sense since transverse crack through beginning of splice in one bar and end of splice in adjacent bar is crossing stiffer region reinforced with the same steel area. If you want I can fax this page to you.

yakov@yakpol.net

RE: Reinforcing Steel Laps

The AASHTO requires bars spliced in a bundle to be spliced one at a time.  Don't forget to check your clear distance between bars also when your done.  After you get past two bar bundles, it gets harder to add more steel in a column unless you start a new layer (ring of steel).

Regards

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