|Partial packages||[German version]|
Partial packages consist of only the material which is absolutely essential to provide adequate protection to the package contents. In some cases, it is only the presence of the partial packaging which makes it possible to handle the package contents. Partial packages are classified into the following types:
|Frameworks: Used when the package contents requires only partial protection.|
|Bundles: Mainly used for transporting tubular items. An „edge protector“ may be used to provide better protection for the ends.|
|Sleds: These consist only of a base structure onto which the item may be securely attached and transported.|
DIN 55 405 defines crates as follows: „Wooden packaging container in the form of a framework structure made from boards, battens or laths and usually strengthened by diagonal battens and/or parallel laths or battens with spaces between them. The corners are generally in the form of three-way corners. A distinction is made between open crates and (closed) crates lined with plywood, chipboard or fiberboard.“
Crates are used whenever complete protection of the contents is not required and the goods are to be made stackable.
The ratio of closed to open area is selected on the basis of the weight of the package contents. The boarding ratio is approx. 1:1 for weights up to 500 kg and 2:1 for weights up to 1000 kg. At weights of above 1000 kg, crates do not provide sufficient stability and boxes must be used instead.
The crate must be constructed so as to permit reasonable marking. This may be achieved by providing an area of continuous boarding.
In general, the ends, bottom, lid and side walls are of identical construction. However, the crate must be equipped with skids under the bottom if it is to be transported with forklift trucks or cranes.
Figure 1: Crate
Figure 2: Three-way corner