×
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

Impact factor for Gantry

Impact factor for Gantry

Impact factor for Gantry

(OP)
Anyone have any clue what is used for an impact factor on outdoor gantry crane wheel loads?  

RE: Impact factor for Gantry

This has been discussed many times - but I think it is 1.5 or 2.  Check your local code book.

RE: Impact factor for Gantry

(OP)
I'm not having much luck Mike.
Any of the major codes have provisions for this?

RE: Impact factor for Gantry

Why wouldn't the impact factor be the same as for an indoor crane?

RE: Impact factor for Gantry

(OP)
I was just pointing out that it was an outdoor gantry.
I have worked with cranes a fair amount but to this point, I have never had to design and supporting structures for a gantry.  

RE: Impact factor for Gantry

The outside gantry crane we use has a wheel load impact allowance of 15 percent, added to the static loads. (I assume it's dependent on CMAA Class Service)

RE: Impact factor for Gantry

IBC 2009 1607.8.2 says 100% for elevators, 50% for power driven units

I would probably use 100% - steel is cheap!

RE: Impact factor for Gantry

I'd say treat it the same as an overhead crane and use the impact factor for cab, pendant or remote operated.   

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