Contact US

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!

*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

Rebar designation - ca 1950

Rebar designation - ca 1950

Rebar designation - ca 1950

I'm trying to determine the characteristics of reinforcing steel from a building built around 1952.  I have a decent set of drawings, but the note designating the rebar is a little muddled. It looks like the call out is for "intermediate grade with deformations to conform to ASTM a-30E".  I'm not sure what "intermediate grade" would be for that time period.

RE: Rebar designation - ca 1950

Have you checked with CRSI?

Mike McCann
MMC Engineering
Motto:  KISS
Motivation:  Don't ask

RE: Rebar designation - ca 1950

I did and, so far haven't found anything on the "free" area.  It looks like the steel would have been under ASTM A-15 and most information I've gathered so far indicates "intermediate grade" would have had fy=40ksi.  I'll keep digging to verify.

RE: Rebar designation - ca 1950

I think the ASTM specification for the deformations should read A305.  And you are correct, intermediate grade would be 40 ksi yield.  This was the grade used until the early 60's, when it was gradually replaced by 60 ksi bars.

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! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close