Design and construction requirements
The general design and construction requirements of this sub-section are deemed to be met if the bulk
container complies with the requirements of ISO 1496-4:1991 "Series 1 Freight containers-
Specification and testing – Part 4: Non pressurized containers for dry bulk" and the container is
Containers designed and tested in accordance with ISO 1496-1:1990 "Series 1 Freight containers-
Specification and testing - Part 1: General cargo containers for general purposes" shall be equipped
with operational equipment which is, including its connection to the container, designed to strengthen
the end walls and to improve the longitudinal restraint as necessary to comply with the test
requirements of ISO 1496-4:1991 as relevant.
Bulk containers shall be siftproof. Where a liner is used to make the container siftproof it shall be
made of a suitable material. The strength of material used for, and the construction of, the liner shall
be appropriate to the capacity of the container and its intended use. Joins and closures of the liner shall
withstand pressures and impacts liable to occur under normal conditions of handling and carriage. For
ventilated bulk containers any liner shall not impair the operation of ventilating devices.
The operational equipment of bulk containers designed to be emptied by tilting shall be capable of
withstanding the total filling mass in the tilted orientation.
Any movable roof or side or end wall or roof section shall be fitted with locking devices with securing
devices designed to show the locked state to an observer at ground level.
Filling and discharge devices shall be so constructed and arranged as to be protected against the risk
of being wrenched off or damaged during carriage and handling. The filling and discharge devices
shall be capable of being secured against unintended opening. The open and closed position and
direction of closure shall be clearly indicated.
Seals of openings shall be so arranged as to avoid any damage by the operation, filling and emptying
of the bulk container.
Where ventilation is required bulk containers shall be equipped with means of air exchange, either by
natural convection, e.g. by openings, or active elements, e.g. fans. The ventilation shall be designed to
prevent negative pressures in the container at all times. Ventilating elements of bulk containers for the
carriage of flammable substances or substances emitting flammable gases or vapours shall be
designed so as not to be a source of ignition.
Inspection and testing
Containers used, maintained and qualified as bulk containers in accordance with the requirements of
this section shall be tested and approved in accordance with the CSC.
Containers used and qualified as bulk containers shall be inspected periodically according to the CSC.
Containers used as bulk containers shall be marked with a Safety Approval Plate in accordance with