What does 'de-rating' mean, and how do I calculate it?

'De-rating' is the term used to describe the decrease in a truck's nominal capacity. This decrease could be due to a number of factors:

  • the lift height (the higher the lift, the greater the de-rating
  • the load centre (the deeper the load centre, the greater the de-rating)
  • any attachments fitted (typically, the fitting of any attachment de-rates a truck)

Put simply, due to de-rating factors, a 4,000kg nominal capacity truck may not always lift 4,000kg.

The range of factors involved in de-rating means it is not straightforward to calculate the de-rating on a specific truck. If you are at all unsure as to what your truck is capable of lifting, get in touch for advice and guidance.

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