×
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

Foundation tie beams - monolithic or separate placement?

Foundation tie beams - monolithic or separate placement?

Foundation tie beams - monolithic or separate placement?

(OP)
I've usually detailed the tie beam to be cast monolithically with the slab on grade. My rationale was that one concrete placement would be cheaper. The owner of the building I'm currently working on has required us to provide contraction joints on 45-60 degree angles to the column lines so fork lift traffic crosses the joints on an individual wheel basis and not per axle. The more I think about it though, no crack is going to cross that large of a section due to path of least resistance.

Do you see any issues if I place the tie beam with the t/beam at my b/slab elevation and run the vapor retarder continuous between the two to act as a bond breaker? Or alternately, drop the tie beam the depth of my granular sub-base so other disciplines can run piping and conduit without interfering with my tie beams.

RE: Foundation tie beams - monolithic or separate placement?

Provide a sketch.

BA

RE: Foundation tie beams - monolithic or separate placement?

Not sure of the purpose or layout of your tie beams, but restraint by monolithic beams will certainly be a factor in slab on ground shrinkage cracking.

The owner's approach is novel in my experience, but at least he's thinking.

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