×
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!
  • 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

Jobs

Flate plate Design

Flate plate Design

Flate plate Design

(OP)
I have a 100x50x6 RHS with another splitting it in the middle all welded together making a "T"Shape but flat. This is for a lifting basket for a forklift and the RHS is for the Forks to slot into but i need to design the Frame for lift by crane also.
If there is a UDL along the top How do i go about designing the top and bottom plates of the RHS to take the load through the plates top and bottom? Any examples or method would be of great help.  

RE: Flate plate Design

Can you not simply keep the existing wall and full pen butt weld the new section against it?  IE: Does the joint have to be hollow?

A sketch might help, but I think your question is clear.  

If you can't keep the web, you might just have to consider the top plate as a beam element, or the entire section as a frame.

Cheers,

YS

B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...

RE: Flate plate Design

(OP)
The joint has to be hollow to allow the forks to enter but the RHS sections either side will be butt welded to the end i just need to prove the open RHS in the middle will transfer the moment through its top and bottom plate so its sort of acting like a UB with a web section cut out the middle with a UDL along the top.  

RE: Flate plate Design

Do you mean the forks enter through the RHS you're designing?  So there are two holes, one on each side of the RHS, to allow the forks to pass through into the 'T' butted RHS?

I'm sorry, but I'm affraid I don't see that working... Load dependant, of course, but without any web you don't have a shear tranfer, except around the outside of the penetration.  You can try to line the hole with a tube capable of taking the load around, but this would be quite a thick tube.

Sound like you might have a situation where you're creating a hinge.  Post a sketch if you want more help.

Cheeers,

YS

B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...

RE: Flate plate Design

For similar cases I've previously just welded a short stub of HSS above or below, and at right angles to, the main HSS section. In some cases I have also used a "box" consisting of three plates and the bottom face of the HSS, which avoids the rounded corners HSS generally have.

Cutting through the section may be giving you the lowest resistance under the highest demand depending on loads and geometry.

RE: Flate plate Design

Stu:

Respectfully, you'll need help to make this work if you can't analyse is on your own.  Are you a Structural Engineer?

The forces may pass through the joining SHS sections, but I don't think it will be as effective as you would hope.  Depending on exactly where the loads come onto the frame this may or may not work.  Also lining the palet with a SHS section might be able to make it strong enough.

I think you need some help, and more than anyone can provide online.  Gwynn's suggestion would be easier to make work with much less analysis.

Good luck,

YS

B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...

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