×
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

foundation design for a 1000 ton press, what is the load?
6

foundation design for a 1000 ton press, what is the load?

foundation design for a 1000 ton press, what is the load?

(OP)
Hi guys,

I ran into this foundation design for a 1,000 ton press. I am just curious what is the design load I should use:

I understand 1,000 ton is the press capacity. However, should I design the FTG for a live load of 2,000 kips???

RE: foundation design for a 1000 ton press, what is the load?

The 1,000 tons will be an internal load and will not be transferred to the footing.  One caveat is if the load is applied very quickly and there are inertial loads.  Other than that, the foundation should be designed for the weight of the machine plus what's being pressed.


If you "heard" it on the internet, it's guilty until proven innocent. - DCS

http://www.eng-tips.com/supportus.cfm

RE: foundation design for a 1000 ton press, what is the load?

Get the operating weight from the manufacturer.  No need to second guess what the machine is doing.

RE: foundation design for a 1000 ton press, what is the load?

(OP)
Thanks guys.

I got this "equipment dead load of 100 kips plus 50% impact" specification. So I only need to consider 150 kips dead load in design? No more live load?
 

RE: foundation design for a 1000 ton press, what is the load?

Get a copy of ACI publication 351.3R-04 "Foundations for Dynamic Loads".  Also be sure to get all the information the manufacturer can give you including any special design parameters, as others have suggested.

RE: foundation design for a 1000 ton press, what is the load?

Do you have any photos or diagrams of the press?  Normally, that's a machine with upper and lower beds, and that force is exerted between them, not between the machine and the foundation.

One example here:
http://www.youtube.com/watch?v=ppEy7wiOpYk
Note that the 4 posts are tension members, the ram is the compression member.

RE: foundation design for a 1000 ton press, what is the load?

David -

The press capacity has little bearing (pun) on the foundation design.

If it is just the weight, it could be just a car or bunch of people.

If is dynamic and cyclical, where there are many cycles and vibration, that gets into a different world that really has little to do with the statics and structural design.

In my experience with heavy individual pieces of equipment (40,000#+) and cycling (6 - 10 cycles per minute and ramped up), the more mass you can prodive is well justified. The reason is that a few yards of concrete and the stability go a long way toward making the equipment operate correctly and last longer. Since this is an industrial situation, the extra construction cost is minimal if it leads to a better operation and reliability.

Just a "seat of the pants" observation.

Dick

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