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!

*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.

Jobs

Why do we use 7 strands of wire in prestressed beams?

Why do we use 7 strands of wire in prestressed beams?

(OP)
is it about the normal force between the concrete and steel? and what the usual size of the strands?

RE: Why do we use 7 strands of wire in prestressed beams?

It works out geometrically. One in the core and six wires around.

RE: Why do we use 7 strands of wire in prestressed beams?

What BB said. The most common diameter of the entire strand is 0.6 inches (nominal), although other sizes exist.

RE: Why do we use 7 strands of wire in prestressed beams?

A 0.6" diameter, 7-wire strand has a cross-sectional area od 0.217 in2.

www.PeirceEngineering.com

RE: Why do we use 7 strands of wire in prestressed beams?

Quote (Lomarandil)

The most common diameter of the entire strand is 0.6 inches (nominal), although other sizes exist.

For 7-wire strand, 1/2" (12.7mm) is more common in building structures and 0.6" (15.2mm) is more common in bridges, at least it is in the USA and Australia.

In the UK, the precast industry used to use (and some still do) 3-wire strands for prestressed planks.

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


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