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!

*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.

Jobs

Wooden beam scarf design

Wooden beam scarf design

(OP)
Hi!
Does anyone maybe have an solved egsample of how to design a wooden beam splice?
Ive modeled an situation of 2 bay wooden beam that needs to be connected with another beam.
Picture attached.

Joint is positioned at zero bending moment position so the joint is only loaded with vertical force.
Conection using metal bolts.

Thank you.

RE: Wooden beam scarf design

What does the rest of the structure look like, i.e. how far away from the support does the splice happen, what are the two span lengths, beam size, etc.

I honestly see this situation more as a cantilever beam and a drop-in beam. Looking at it this way you have to check one beam as simple span, the other as cantilevered. and then check the cantilevered beam for shear at the bearing point of the simple span beam (the reduced cross section area).

If the shear of the cantilevered beam at the reduced cross section is fine, and is also fine for negative moment at the support, then the bolts are just there to keep the beams in place and wouldn't do a whole lot from a loading perspective. Although with the slope bearing you are showing there will be an induced axial force so they would need to be sized for that shear.

Personally, I'd prefer a butt-splice with a steel knife plate for an aesthetically pleasing strictly shear connection. Reducing the cross section of wood beams still doesn't sit right with me. If it needs to be notched then I prefer square cuts as opposed to the sloped one you've shown.

RE: Wooden beam scarf design

(OP)
Hi jayrod.
Please see picture attached for more information.
The joint (lap) is located at zero bending moment location.
Shear force is NOT zero at this location.

Bending stresses checks at internal support are OK
Shear stresses at internal support are OK
Bending stresses ar first bay span are OK.


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


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