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

Timber design - stress grading

Timber design - stress grading

Timber design - stress grading

I have not done a lot of timber design to US codes but...is structural timber stress graded in the USA and can i verify that on a site. That is, can i pick up a piece of lumber on a project site and clearly see what stress grading it is via a grading stamp?

Same with plywood - does the US stamp plywood sheets and provide stress grades for the sheets?

My previous timber design was to Australian standards where we would see say "F14" stress grade that designates 14 MPa (2ksi) allowable bending stress.


PS - i call it timber but US engineers call it WOOD - sorry i am from the south, as in down-under south! I have always thought that wood comes from a tree, but timber comes from a mill :)

RE: Timber design - stress grading

The answer to your question is yes, the lumber, plywood is stamped.

By the way we call wood here because back in our day us engineers were responsible for the felling, milling, engineering, and constructing of all our timber structures!

Well, what did you expect after we walked three miles (one way and up hill both ways) four feet deep snow to get to school!  By the time we graduated from school we were pretty hard up to top some of those earlier feats!

RE: Timber design - stress grading

thanks Qshake...

i guess you also mined our own ore, smelted you own steel, rolled your own sections, then had breakfast...etc

seems like the lumber and plywood i have seen is from asia and probably not rated...certainly no APA or equal stamp. I will investigate further. again, thanks.

RE: Timber design - stress grading

Qshake...this has nothing to do with engineering, but your fabulous rantings reminded me of a great dialog from Monty Python where four fellows rant on about the "bad old days".


RE: Timber design - stress grading



Great stuff...fond memories...those were the days...don't make comedy today like they used to....

..."But you try and tell the young people today that... and they won't believe ya'..."

RE: Timber design - stress grading

Thats great!! I haven't stopped laughing yet!!

RE: Timber design - stress grading

Refer AITC “ Timber Construction Manual” Chapter 6- Design of Structural Systems. All the details are available includes Design, Erection and connections etc.,. For design of timber structural systems both Glued laminated Timber and swan lumber as per AITC provisions are available in STAAD.Pro.

RE: Timber design - stress grading

Wood to me are any 2x stock.  Timber to me are stock like 6x6, 8x10, etc.  I think NDS gives a description of what qualifies as "timber".  Up here in the Northeast, most homes are stick framed with conventional 2x.  There has been a push lately back to Post and Beam construction.  A lot of mortise and tennon connections with wood pegs and such.  We usually call this Timber Construction.  There are even companies that specialize in just this type.  Vermont Timber Works is one.

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


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