Strengthening devices such as timber supports to increase stacking performance may be used but shall
be external to the liner.

Where IBCs are intended for stacking, the bearing surface shall be such as to distribute the load in a
safe manner.

Specific requirements for wooden IBCs

These requirements apply to wooden IBCs for the carriage of solids which are filled or discharged by
gravity. Wooden IBCs are of the following types:
11C Natural wood with inner liner
11D Plywood with inner liner
11F Reconstituted wood with inner liner.

Wooden IBCs shall not incorporate top lifting devices.

The strength of the materials used and the method of construction of the body shall be appropriate to
the capacity and intended use of the IBC.

Natural wood shall be well seasoned, commercially dry and free from defects that would materially
lessen the strength of any part of the IBC. Each part of the IBC shall consist of one piece or be
equivalent thereto. Parts are considered equivalent to one piece when a suitable method of glued
assembly is used (as for instance Lindermann joint, tongue and groove joint, ship lap or rabbet joint);
or butt joint with at least two corrugated metal fasteners at each joint, or when other methods at least
equally effective are used.

Bodies of plywood shall be at least 3-ply. They shall be made of well seasoned rotary cut, sliced or
sawn veneer, commercially dry and free from defects that would materially lessen the strength of the
body. All adjacent plies shall be glued with water resistant adhesive. Other suitable materials may be
used with plywood for the construction of the body.

Bodies of reconstituted wood shall be made of water resistant reconstituted wood such as hardboard,
particle board or other suitable type.

IBCs shall be firmly nailed or secured to corner posts or ends or be assembled by equally suitable
devices.

The liner shall be made of a suitable material. The strength of the material used and the construction
of the liner shall be appropriate to the capacity of the IBC and the intended use. Joins and closures
shall be siftproof and capable of withstanding pressures and impacts liable to occur under normal
conditions of handling and carriage.

Any integral pallet base forming part of an IBC or any detachable pallet shall be suitable for
mechanical handling with the IBC filled to its maximum permissible gross mass.

The pallet or integral base shall be designed so as to avoid any protrusion of the base of the IBC that
might be liable to damage in handling.

The body shall be secured to any detachable pallet to ensure stability in handling and carriage. Where
a detachable pallet is used, its top surface shall be free from sharp protrusions that might damage the
IBC.

Strengthening devices such as timber supports to increase stacking performance may be used but shall
be external to the liner.
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