×
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

reinforced concrete column ties

reinforced concrete column ties

reinforced concrete column ties

(OP)
What tie pattern is suggested for round column. I have seen circular tie with 135 degree hooks at each end and have also seen circular ties where the ends overlap one another.  Is the style a contractor preference or a code requirement?

RE: reinforced concrete column ties

I'd prefer to use a spiral tie for round columns.  If requested as an option, I had used the circular ties with a 135 degree hook.  I am not sure if it is allowed in California but I would stay away from lap splices for the ties. just because.

RE: reinforced concrete column ties

Spiral ties are best for round columns but they have special terminal requirements too.  Look in ACI chapter 21 or the reinforcing chapter.

RE: reinforced concrete column ties

This brings up a question I have.  I design a lot of light frame structures in Caliornia (seismic zone 4) with drilled pier foundation due to expansive soils and/or hillside locations.  I often give contractors the option of using spirals for cast in place pier reinforcing instead of square ties.  Section 1907.10.4.4 of the 1997 UBC calls for one and one-half extra turns at each end of the spiral unit.  Section 1921 defines a "hoop" as a closed tie or continuously wound tie.  It goes on to say that a continuously wound tie shall have a seismic hook at both ends.  Does this apply to spirals used for piers?  The seismic hooks get in the way of the hose when the concrete is pumped into the piers.

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


Resources

eBook - Integrating the Engineering Ecosystem
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. Download Now
Research Report - Simulation-Driven Design for SOLIDWORKS Users
In this engineering.com research report, we discuss the rising role of simulation and the paradigm shift commonly called the democratization of simulation. In particular, we focus on how SOLIDWORKS users can take advantage of simulation-driven design through two analysis tools: SOLIDWORKS Simulation and 3DEXPERIENCE WORKS. Download Now
White Paper - Industry 4.0 and the Future of Engineering Education
With industries becoming more automated, more tech-driven and more complex, engineers need to keep their skills and knowledge up to date in order to stay on top of this wave—and to be prepared for the Industry 4.0 future. The University of Cincinnati offers two online Master of Engineering degree programs designed specifically for practicing engineers. Download Now
eBook - The Design Gridlock Manifesto
In this eBook, you’ll learn 6 ways old CAD technology slows your company down and hear how design teams have put those problems to rest. “The Design Gridlock Manifesto” shares first-hand modern CAD experiences from 15 companies around the world. Download Now

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