×
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 I-Joist Floor System

Concrete I-Joist Floor System

Concrete I-Joist Floor System

(OP)
I am trying to identify an existing concrete floor system for an existing Commercial Strip Plaza Retail building constructed in 1957 in CT.
The floor system consists of a 4.5" thk cast-in-place concrete slab over a series of pre-cast concrete I-Joists. The I-Joists span 25' and are 14" deep x 4.5"W flanges (T&B). Reinforcement appears to be either (2) #5 or (2) #9 T&B. There are no welded end plates that would indicate pre-stressing. Reinforcing bars appear to run horizontally (not draped), (4) bars per I-Joist section. Joist spacing is 30"OC.

Can you tell me what type of floor system this might be and how would you recommend to analyze for floor load capacity?

RE: Concrete I-Joist Floor System

(OP)
Thanks for replying, albeit briefly. I am looking for an identification of this type of system framing (ie. something like the Lithi-Bar Joists, etc.) that would have been the type used in 1957. I am also looking to see if anyone had any experience with analyzing this type of system. Thanks again.

RE: Concrete I-Joist Floor System

I have seen a similar product in Canada, but the manufacturer is no longer in business. The top flange was roughened and the cast-in-place slab was considered to act compositely with the joist forming a tee section. The analysis was similar to any reinforced joist system.

BA

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