8.217. A fence must be erected around a bulk plant and(1) be not less than 1.8 m high;
(2) be of firmly meshed metal wire of a gauge not smaller than USSMSG No. 9, if it is made of steel with mesh openings not greater than 150 mm on the side;
(3) be not less than 150 mm from the ground, including its gates;
(4) be fixed to metal poles driven solidly into the ground; and
(5) have at least two gates to enable traffic of road vehicles that meet the requirements of paragraphs 1, 2 and 4, as remote from each other as practicable and that have locking devices.