×
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

Shear friction/Shear reinforcing

Shear friction/Shear reinforcing

Shear friction/Shear reinforcing

(OP)
I have a ledge for a precast stair bearing. The shear capacity is not enough for concrete alone, so some reinforcing. If I look at shear friction method, would the reinforcing need to be developed on both sides of the crack? If I use a hairpin, is that not just Vs instead of shear friction. What do you guys think?
Thanks
 

RE: Shear friction/Shear reinforcing

Is this new construction or a remodel?

Mike McCann
MMC Engineering

RE: Shear friction/Shear reinforcing

(OP)
New construction

RE: Shear friction/Shear reinforcing

Would it not be an idea to opproach the reinforcing solution to this problem in the same way corbels are designed?   

RE: Shear friction/Shear reinforcing

For shear friction, yes it must be developed on both sides of the crack.  Look at it as a beam ledge (similiar to corbel) - see the PCA notes for a good example.   

RE: Shear friction/Shear reinforcing

(OP)
I ended up putting some #3 hair pins in the ledge. Its only 4" tall and also only 4" out from the face. Load isnt that high, but want to make sure that I am detailing the rebar right. Thanks guys
 

RE: Shear friction/Shear reinforcing

The hairpins must be looped around a transverse bar to have development near the bend of the hairpin assuming both tails are on the same side of the potential crack.

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