×
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

angle bracket

angle bracket

angle bracket

(OP)
I am supporting several beams along a concrete wall, with the heaviest load being 23 kips.  It was recommended to attach an angle along the wall with one row of bolts.  I felt that it would be better to have a support for each beam with 2 rows of bolts to reduce the pullout force, however, I am looking at this scenario for ease of installation.

Looking at an 8x8x3/4 angle with a row of high strength HILTIs 3" from the top, i took the 23 kip load and applied a moment arm of 4", and came up with a Pullout load of 23*4/5 = 17.5 kips (2 gusset plates at the center of the bolts stiffen the angle to pivot at its end).  There are 3 bolts near each beam spread out 12" to get full concrete pullout strength, so that amounted to approximately 6 kips/bolt in Pullout and 8 kips/bolt in shear.

I am wondering on stress in the angle.  I'm ok with the bending about the horizontal axis parallel the angle, since the stiffener acts as a stem and the plate of the angle as the flange.  Do you typically look at bending of the connected leg about the vertical axis for instance?  If so, a 6 kip tensile bolt load applied at a distance of 6 inches from the stiffener would be a 36 in-kip moment.  Since the angle is only 3/4" thick, its section would be small and a high stress would result.  I am wondering if this is extremely conservative as it is more of a 2 side supported plate (3 if two gussets surround bolt) or maybe deflection of this area would just put plate in some sort of tension mode?  

Any input is appreciated.

RE: angle bracket

You have to consider all these stresses, but I think your connection works.  The critical thing in these connections is the workmanship in installing the anchors.

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