×
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

About Post installed in Concrete

About Post installed in Concrete

About Post installed in Concrete

(OP)
I was trying to determine if a post is installed in concrete , what things i should consider in my design..
1) Pull out strenght..
Could you help me find the code requirements..
Thanks in advance

RE: About Post installed in Concrete

Check out Appendix D in your jurisdiction's ACI code.

RC
All that is necessary for the triumph of evil is that good men do nothing.
    Edmund Burke

RE: About Post installed in Concrete

(OP)
Thanks RC for the information,
So, I should design the post as it is an anchor/ bolt...
If my post is very close to the edge of concrete.. is there any min requirement that my post will not breakout the concrete at the edge..


Had a 2nd question: is there any requirement for base plate if i want to design using a base plate and anchors

RE: About Post installed in Concrete

Appendix D was implemented in the ACI 318-05 code. It is exactly what you are looking for with regard to designing for breakout strength of post-installed anchors for edge distance, spacing, etc.

2nd Question - You can look at AISC Design Guide #1 - Baseplate Design - there are a few examples which will walk you through using this similar design methods for baseplate and anchor design.

RC
All that is necessary for the triumph of evil is that good men do nothing.
    Edmund Burke

RE: About Post installed in Concrete

(OP)
Thanks RC;
I do have AISC code book somewhere..but surely i donot own the Design guide #1,
Is there any other ref guide ..online or in code book..
..

For Calculating the pull out strength using Section D5.3:-
Area of bearing doesnot consider the post depth..for anchors it might work ..but for post?

RE: About Post installed in Concrete

(OP)
RC:-
while designing the post as anchor, i donot have any pojection of my post at end of concrete...will it not affect my pull out strength..
and since my post is smooth , what precaution should i take too...

RE: About Post installed in Concrete

Attach a stiff horizontal member of some area to bear on concrete for vertical pull, (and calculation of pull out strength), add reinforcement to substitute for increased edge distance to resist side breakout.

RE: About Post installed in Concrete

(OP)
But my design is for precast concrete...
we have to drill hole in concrete to required strength and then.. install the post..(rectangle or square)
So i needed to cal the required embedment in concrete and required edge distance...

RE: About Post installed in Concrete

Can post a sketch of what you are trying to do? Is this a wall or double tee or something?

RE: About Post installed in Concrete

(OP)
ASSUME IF YOU WANT TO CONSTRUCT A POST ON STAIR CASE..
WHAT IS THE MIN EDGE DISTANCE REQUIRED AND MIN EMBEDMENT REQUIRED..SO THAT SHEAR AND TENSION FAILURE IS AVOIDED

RE: About Post installed in Concrete

Staed79, the criteria can change, depending on the load. If you have post and its heavily loaded, and also inducing a moment, it can change the design

RE: About Post installed in Concrete

(OP)
Jrisbo
Could you send me some link or examples..where i could see my options in designing..
My post is not much heavyly loaded..

RE: About Post installed in Concrete

(OP)
The best way to visualize my problem is , assume you are to design a post/ railing along the stairs. only load is 200 lbs in any direction on the top rails. the post carry yhe reaction load from the rail to concrete..
What will be the min edge distance i need to provide..
Can you help designing the post on concrete..

RE: About Post installed in Concrete

Why don't you just put a baseplate and some post installed anchors?

RC
All that is necessary for the triumph of evil is that good men do nothing.
    Edmund Burke

RE: About Post installed in Concrete

(OP)
That's the design requirement...to use the post embedded on concrete

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