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kane343
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Join Date: Aug 2009
Posts: 5

p&h

11/04/2009 9:26 AM

on a p&h-670wlc crane,what is the difference between the stability capacity and the gross capacity?
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#1

Re: p&h

11/04/2009 9:28 AM

The safety margin!

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The Prof
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#2
In reply to #1

Re: p

11/05/2009 10:38 PM

Don't think so, the safety margin is built into the load charts.

Do not know the specific crane load charts to which the OP is referring, but lifting capacity is limited by two factors:

  • Structural strength - usually at small radius and
  • Stability usually - at large radius

The load chart is usually split by a bold line, indicating to the operator which capacities are limited by structural strength and which by stability of the crane.

I guess that Gross capacity shows the structural strength limitation and Stability capacity tells you when the structure will survive but the silly thing may fall over..

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