Zambo, you are hereby awarded a black-belt in Google-Fu!
I pride myself on my search abilities, but I missed that one.
Thanks a lot!
www.hliconsulting.com
Specialists in Heavy-Lift and Transport Planning
The casing weighs 40,000 Lbs
The 275t crane is actually rated for 165,000 Lbs
I certainly will not allow them to pull that much, as a sudden release would have unpredictable consequences.
I really just trying to put a conservative, safe procedure together for something that appears to happen...
Thanks for your replies.
We suggested the jacking idea to our client, and he will do that if he cannot get permission to "dry pull" This is merely a contingency in case they lose their hammer. It is not meant to be a common practice.
He says they routinely pull casings like this, and the only...
I have a client who has asked us to write a procedure for "dry" pulling casings with a crane (i.e. no extraction hammer will be used)
His client and the crane manufacturer have their doubts, but I believe it's possible to proceduralize the process and perform the maneuver safely.
Do anyone...
Hokie,
You're right in the sense that the support method was to blame, and should have been better designed.
From carrying out hundreds of lifts, I've found it's often the case that a problem can be mitigated by the response of the crew.
I have to say I think they could have responded better...
Err, they did use Pontoons. The problem was with the underlying ground.
Not only was the existing ground saturated by being adjacent to water, but the fill they placed had been subject to torrential rains in the days preceding the lift.
Also, the signaler and operator took far too long to...
While I appreciate your taking the time to answer, you say "Once you determine the force at that angle" and "then you need to determine the coefficient of friction"
If I know how to do that, I wouldn't have asked the question.
Anyway, thanks for your time, I got my answer elsewhere...
This may be too vague a question, but here goes:
I have to get a 420 tonne (GVW Load & trailer) load up a 13% grade. How much tractive force would the tractor unit need to have?
Not much I know, but that's all the information I have for now.
Chicopee, I have searched for the thread you mentioned but cannot find it, can you enlighten me?
www.hliconsulting.com
Specialists in Heavy-Lift and Transport Planning
I have loading software for many crane models. Let me know which crane you are using and the lift data. maybe I can help.
Also remember, due to the profile of the tracks on many crawler crane models (a lot of them "turn up" at the edges), the loadings are higher on concrete or steel than on a...
I have yet to find a 32bit program that won't run on a 64 bit machine. 64 bit applications work best though. Drivers, now that's a different matter.
If you have old hardware, you might run into trouble.
www.hliconsulting.com
Specialists in Heavy-Lift and Transport Planning
I heard also that in the days of pen plotters, draftsmen would draw multiple lines to achieve different line thicknesses.
When the pen got to one of these lines, the pen would go back and forth and the ink would spread, thus getting thicker!
www.hliconsulting.com
Specialists in Heavy-Lift and...
Erickson now have a model that will lift 25,000 Lbs
http://www.ericksonaircrane.com/img/aircranespecs-designandperf.jpg
Their web site: http://www.ericksonaircrane.com/index.php
www.hliconsulting.com
Specialists in Heavy-Lift and Transport Planning
You can expect to pay $150k for a helicopter lift like this.
Also, they are very weather sensitive. One breath of wind and they cannot go to work.
Contact me through the website below. We'd love to take a look at lift options for your job.
www.hliconsulting.com
www.hliconsulting.com...
Export the file as a PNG image. This works especially well for drawings as AutoCAD automatically inverts the colors. This makes it much easier to work with, especially if you want to trace it.
www.hliconsulting.com
Specialists in Heavy-Lift and Transport Planning
Autodesk's licence agreement doe not allow the selling of older versions. There has been quite a lot of discussion about this over the web.
There are even stories of companies getting legal warnings just for asking if they can donate, yes donate, older versions to schools etc.
There used to be...
In 2007
Tools---> Options ---> Profiles
Select current profile then click export and save .ARG file
In 2009
Tools---> Options ---> Profiles
Import profile
Manitowoc provide "list charts" for their cranes when used on barges. They assume an out of level crane.
Call a dealer and ask.
De-rating a crane by 50% is very conservative.
Also waiting for the crane to tip to know when yo have reached it's limit is EXTREMELY DANGEROUS!
Also, to a1a1a, the...
