Member Login

Remember Me
Forgot Password?
Join Us!

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!

Join Eng-Tips
*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.

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

Impact load for steel beam

Impact load for steel beam

I need to design a steel beam for impact load. Does AISC manual have a provision for this kind of design? I would appreciate any help.

RE: Impact load for steel beam

usually just involves factoring your load with an impact factor and in the case of repeated loading, checking for fatigue.  

RE: Impact load for steel beam


Thanks for the very quick response.

Do you know how to calculate impact factor (section in AISC 13th ed.)?

RE: Impact load for steel beam

A little more information will give you a more specific response.

RE: Impact load for steel beam

This is a pulley system (2000 lbs maximum load) to lift and move loads from one end to another end of the beam.

RE: Impact load for steel beam

You can find guide at a number of publications. For example the
AISC Steel Design Guide Series, number 7 Industrial Buildings Roofs to column Anchorage.

RE: Impact load for steel beam

like a monorail?  

RE: Impact load for steel beam

I don't know where it is in the 13th Edition, or if it is even in there.  

Unless it has changed recently, the "minimum" impact load is 1.15(W) where W includes the weight of the hoist itself.  

To this 1.15 number, you have to add 0.05 for every ft/min of your hoist lifting speed up to a "maximum" impact factor of 1.5

Try to locate the publication ANSI MH27.1  
It will be in there under section 6, I believe.

FYI, our company's design minimum impact factor starts at 1.25 and goes up to 1.5

Hope this helps!

RE: Impact load for steel beam

check ibc or asce

RE: Impact load for steel beam

MH27.1 is patented tracks, no?  

RE: Impact load for steel beam

Yes, but why would one want to design to less than what is considered acceptable by the manufacturers of the hoist equipment. Even though I've never patented any monorail I've designed, I've designed based on this publication.  I've been in a plant where the monorail's deflection exceeded the amount of slope the hoist could move the load.  It wasn't pretty.

My $0.02, and I guarantee anyone else who's been in the industrial business for long, would throw their $0.02 in on top of mine.

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!


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