First, and for most, is the safety aspects the trailer offers. In tests undertaken by MIRA for tipping stability, it remained planted on the ground at 8.5 degrees, exceeding the requirement set to obtain class A certification by 13%, its outstanding ability to remain upright on adverse ground conditions makes it the only trailers allowed on many sites. The trailer stability is due to the sliding bogies wide chassis centre and shorter chassis length in the tipping position.
With the trailer in its running position, it meets all legal requirements, and in the shortened position it can out manoeuvre an 8×4 in tight spaces, with the trailer in the shortened position it gives a reduced wheelbase to the kingpin of 7 metres, which is roughly the same as an 8×4 tipper.
With the trailers low unladed weight, the payload with a steel body is approximately 28.5 tonne with a GVW of 44 tonnes (subject to the tractor unit ULW). With an aluminium body the payload is approximately 29.5 tonne. Compared with a 19.7-tonne payload an 8×4 tipper, this offers you 9.8 tonne greater payload, which reduces miles on the road for the same product movement and greater income. On average for every 3 journeys made by an 8 x 4, you will only need to do 2 journeys with the sliding tipper.
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