I have recently carried out an accident investigation into a tractor overturn accident whilst grass cutting. One of the contributory factors was the gradient on which the tractor was cutting but I cannot gain any definitive information or guidance from manufacturers as to a safe angle. This is apparently due to the number of factors which may vary the safe angles or could it be a sales issue? For ride on mowers the general guidance seems to be 15 degrees but no figure for a tractor. If anyone has credible guidance could you please post a response.

Hi, BS 4428 (Code of Practice for general landscaping), gives a angle of 1:3 (18 degrees) as the maximum gradient for "suitable tractor mounted mowers" (subject to the manufacturer's recommendations).