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


Wood Beam Fv’

Wood Beam Fv’

Wood Beam Fv’


I have a question regarding shear stress parallel to grain of a wood beam, Fv’. My loading condition consists of a wood beam with a continuous beam cantilever over one of the supports (two total) and has a distributed load on it. There are also point loads acting from above the two support locations acting downward from columns above on top of the beam at each support location. Also there is a point load at the end of the cantilever.

Do the point loads acting downward on top of the beam, at the supports, contribute to the shear parallel to grain or is that only perpendicular to grain at those locations?

Sketch attached. The ultimate question is what shear valve should be used when calculating shear stress parallel to the grain, Fv’.

RE: Wood Beam Fv’

Quote (Lake06)

...what shear valve should be used when calculating shear stress parallel to the grain, Fv’.

I assume the wood beam has a constant rectangular cross section:

1) You have sketched a nice free body diagram.

2) Draw the shear diagram.

3) The greatest shear value on the shear diagram (either positive or negative) is the maximum vertical shear.

4) Multiply the maximum vertical shear value (from Step 3) by 1.5.

That's all, the answer from Step 4 is the maximum horizontal shear (parallel to the grain).

www.SlideRuleEra.net idea

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!


eBook - Efficient and Effective Production Support with 3D Printed Jigs and Fixtures
Jigs and fixtures offer manufacturers a reliable process for delivering accurate, high-quality outcomes, whether for a specific part or feature, or for consistency across multiples of parts. Although the methodologies and materials for producing jigs and fixtures have evolved beyond the conventional metal tooling of years past, their position as a manufacturing staple remains constant due to the benefits they offer. Download Now
Overcoming Cutting Tool Challenges in Aerospace Machining
Aerospace manufacturing has always been on the cutting edge, from materials to production techniques. However, these two aspects of aerospace machining can conflict, as manufacturers strive to maintain machining efficiency with new materials by using new methods and cutting tools. 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