Crane Question

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Anonymous Poster	Crane Question 02/26/2008 6:15 PM
	Four rollers are carring a 40 ton unbalanced weight- What must be the minimum capacity of each roller?
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#1 Re: Crane Question 02/26/2008 6:37 PM
	40 tons. __________________ "Love justice, you who rule the world" - Dante Alighieri
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Labyguy Guru Join Date: Dec 2006 Location: Charlotte, NC USA Posts: 791 Good Answers: 17	#2 Re: Crane Question 02/27/2008 12:09 PM
	Funny, but not correct, The load is distributed evenly, each roller only needs to safely handle 20 tons. That said, the load is only unbalance to the point were it is not yet picked up by the crane. After the full load in on the hook, the crane will only see a balanced load, how the load travels is a condition of the slings or chains. If you watch a crane pick an "unbalanced" load, it either moves over the center of g, or it slides the load to move the center of g to directly under the hook. __________________ Be careful of what you wish for .....
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#3 In reply to #2 Re: Crane Question 02/27/2008 1:57 PM
	Where does the crane come into it? OK, it was in the thread title, but the OP just stated that "Four rollers are carring a 40 ton unbalanced weight ...". __________________ "Love justice, you who rule the world" - Dante Alighieri
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Labyguy Guru Join Date: Dec 2006 Location: Charlotte, NC USA Posts: 791 Good Answers: 17	#4 In reply to #3 Re: Crane Question 02/27/2008 3:13 PM
	True, if "Four rollers are carring a 40 ton unbalanced weight ..." the way you read it, I'd say, Yup, the rollers need to support 40 tons. But when I saw 'Crane' I thought about two rollers on the left and two rollers on the right, bridge in the middle, which is why I answered the way I did. So, I think we are both right... __________________ Be careful of what you wish for .....
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#5 In reply to #4 Re: Crane Question 02/27/2008 4:31 PM
	Cool. __________________ "Love justice, you who rule the world" - Dante Alighieri
	Reply Off Topic (Score 5)

These comments received enough positive votes to make them "good answers".

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