×
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

J-Series Joists

J-Series Joists

J-Series Joists

(OP)
I am trying to nail down a capacity for existing floor system that the architect wants to use for an alternate loading condition. I am looking for total and live load capacities for the following J series joists:  

14J5's spanning a maximum of 20'-7"
14J4's spanning a maximum of 18'-2 1/2" + 1'-7" top chord extension.

I understand that these joists used A36 steel, and no design live load is listed on the 1963 drawings. I have a capacity estimate but I am looking for something more accurate.

Any help would be appreciated.

Thank you for your time and help.

RE: J-Series Joists

14J5, 21' span:  287 plf total
14J4, 18' span:  311 plf total (no mention of tcx)

From the SJI 60-Year Manual, pg. 256.

RE: J-Series Joists

(OP)
Thank you so much. The joist ended up being the limiting component on the strength of the floor system.  The architect has since expanded the area to be modified and now I am also looking for information on:

18J8's spanning 27'-2", and
16J6's spanning 20'

RE: J-Series Joists

You need to purchase the 75-year joist manual it seems.

RE: J-Series Joists

(OP)
Yes, I do. It is in fact on order.

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