Contact US

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.

Students Click Here

Minimum Embedment depth bleow the Anchor Bolt

Minimum Embedment depth bleow the Anchor Bolt

Minimum Embedment depth bleow the Anchor Bolt


I need to know the minimum depth of Embedment below the Anchor Bolt also specify the reasons behind it. One of the factors is side face blow out.

RE: Minimum Embedment depth bleow the Anchor Bolt

You don't need a plate washer... just a heavy hex head nut. the depth is not to the end of the anchor rod, but, to the top of the nut... I typically use 18 x dia for 50 grade bars and 24 x dia for high strength bars, then, check them through my spreadsheet.


RE: Minimum Embedment depth bleow the Anchor Bolt

For anchors in tension, the only function of the concrete below the anchor rod is to protect it from moisture. My preference is 3", but in thin slabs I can live with 1".

RE: Minimum Embedment depth bleow the Anchor Bolt

I see you are concerned about side-face blowout. ACI 318-11 Section D.8 & RD.8 discusses this issue and addresses it by specifying a minimum edge distance for cast-in anchors (4*da for cast-in anchors that will not be torqued, and 6*da for cast-in anchors that will be torqued, where da is the diameter of the anchor). If you are concerned about an edge failure, provide anchor bolt edge reinforcement by using hairpins, ties, etc. in accordance with ACI 318-11 Section D.6.2.9. I was recently asked to review a splitting failure that occurred when a contractor was pre-tensioning anchor rods with sleeves for an equipment foundation. A splitting failure occurred during subsequent torquing and the edge distance provided was only 4*da. (Big lawsuit, be careful out there)

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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