×
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

Expansion or Isolation Joints for concrete

Expansion or Isolation Joints for concrete

Expansion or Isolation Joints for concrete

(OP)
Does anyone know where I can find specifications and/or details on expansion joints for concrete? I'm looking fo dimensions,placement, etc. If a code or standard exists, I need to reference it.

RE: Expansion or Isolation Joints for concrete

All documents concerning this are fairly vague.  One of the less vague is "Expansion Joints in Buildings" by the National Academy of Sciences Building Research Advisory Board/Federal Construction Council Technical Report No. 65.  It's dated 1974.

RE: Expansion or Isolation Joints for concrete

If you are looking for joints for concrete slabs on grade, one of the better references is "Concrete Slabs on Grade", published by the Portland Cement Assoc.

Expansion joints are rarely needed.  Control joints are almost always needed.  General rule of thumb is the joint spacing should be about 24 to 36 times the slab thickness (that will be in inches).  Joints should be saw-cut to a depth of about 25 percent of the thickness and should be cut THE DAY OF PLACEMENT!  If you wait until the next day, it's too late.  Cut the joint as quickly as you can get the saw to cut without raveling the joint.

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