×
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

Concrete over Raised Wood Floor @ Garage

Concrete over Raised Wood Floor @ Garage

Concrete over Raised Wood Floor @ Garage

(OP)
I saw somes posts regarding subject at this thread:
http://www.eng-tips.com/viewthread.cfm?qid=227077

Mike mentioned using l/1000 as deflection limit. Would this be dead & live deflection or only live?

Thanks,

Smokii

RE: Concrete over Raised Wood Floor @ Garage

Only briefly took a look at the thread but I would imagine that limit would apply to loads that are applied after the concrete has hardened. That may include a portion of the dead and all of the live depending on the construction sequence.

RE: Concrete over Raised Wood Floor @ Garage

(OP)
I'm sorry I don't undertand. Yes to one of three options posted :)

RE: Concrete over Raised Wood Floor @ Garage

Sorry.

I normally would set the limit to the live load deflection at L/1000 as that is what will be working the concrete vertically after it cures, as SteelPE mentioned.

That being said, I would still set the total load deflection at L/600 so as not to have too much ponding of concrete, increasing the load further to the floor joists, if you know what I mean.

Mike McCann
MMC Engineering
http://mmcengineering.tripod.com

RE: Concrete over Raised Wood Floor @ Garage

(OP)
Ah...thank you, Mike. Yes...that helps. I understand the concept, but how did you arrive at 600 for total load as opposed to some other number?

RE: Concrete over Raised Wood Floor @ Garage

It does depend on whether the wood support is temporarily shored or not. Once the shoring is removed, the concrete will "feel" its own self weight as well as the live load later.

RE: Concrete over Raised Wood Floor @ Garage

Unshored JAE, unless the span is too great for the depth of lumber that can be tolerated.

L/600 is the standard for brick masonry walls, so I just adopted that and it has worked just fine.

Mike McCann
MMC Engineering
http://mmcengineering.tripod.com

RE: Concrete over Raised Wood Floor @ Garage

(OP)
Thanks. I appreciate the help!

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