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

Brownbuilt C812 purlins (about 1974)

Brownbuilt C812 purlins (about 1974)

Brownbuilt C812 purlins (about 1974)

I am looking at a roof layout(about year 1974) with C812 purlins. Has anyone any span tables or dimensions of this C812 purlin? Would appreciate your comments.

RE: Brownbuilt C812 purlins (about 1974)

Loxton south Australia. Thanks JAE

RE: Brownbuilt C812 purlins (about 1974)

I used to have some tables for brownbuilt purlins but can't find them.

It's an 8" deep purlin, the 12 likely refers to 1.15mm base metal thickness metal. This is based off current 200/12 purlins being made from 1.15mm bmt metal sheet. So I'd expect if the purlin has stiffeners then it's performance might be similar to a current 200/12 purlin. If there are no stiffeners you might need to look at it from first principles.

RE: Brownbuilt C812 purlins (about 1974)

Note should say I'm not sure what steel grade they were back then but if comparing to current charts you would need to factor in the differences. But I now remember they were a plain Cee shape.

Brownbuilt was bought out by lysaght I believe (before my time), so their current plain Cee section range probably has similar geometry for what it's worth.


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