The equipment comprises a tray 300 mm square which, when used in conjunction with a specially calibrated spring balance, will determine the rate of spread of coated chippings in terms of kg/m2. The spring loaded balance will accept rates of spread between 4 and 16 kg/m2.
Between 5 and 10 trays are positioned in the path of the spreading machine and after the machine has passed over, each tray is lifted, together with the retained chippings, by means of four chains. The chains are hooked to the spring balance and the rate of spread is read directly from the balance scale.
