×
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

Load Factors used in 318-63
2

Load Factors used in 318-63

Load Factors used in 318-63

(OP)
I'm looking for information concerning the load factors used in ACI 318-63.  I have a copy of the 318-77 and references to the 318-71 where they indicate the older 1.4D and 1.7L were the norm.

My question is this - were the load factors different in the 318-63 document?  We are trying to pin down an existing structure load capacity built in 1968 and an older engineer that was involved in it seems to recall using 1.5D and 1.8L.

With these higher load factors I would then question whether the 318-63 used a Φ factor as well....or was it LFD instead of LRFD initially and then changed in the 71 code.

 

RE: Load Factors used in 318-63

(OP)
hokie66?  I seem to recall you might have a copy.

RE: Load Factors used in 318-63

(OP)
ash060 - thank you.

Also - did 318-63 have a prestressed concrete section?  If so, did these load factors apply and did the same Φ factors apply?

 

RE: Load Factors used in 318-63

JAE,
Yes, there was a prestressed concrete section.  Chapter 26--Prestressed Concrete.  Pages 113 to 125.  The load factors and capacity reduction factors were the same as in the pages which ash060 posted.

RE: Load Factors used in 318-63

(OP)
Thank you both.  Appreciate it.

RE: Load Factors used in 318-63

Yea...  1.5 & 1.8 in mine too along with phi of .9 for flexure, .85 for DT, bond and anchorage, .75 spiral and .7 for tied compression.

Mike McCann
MMC Engineering

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