Load security through restraint relies on intensifying the friction forces between the load and the loading surface. The pressure on the load is increased with the aid of lashing equipment, hence the load is more strongly pressed onto the loading surface, retaining its position.
Restraint as the load securing method: When lashing down a load, the restraint equipment does not directly secure a load, but increases the contact pressure. Friction alone prevents the load from slipping.
Load securing through containment is based on limiting the loading area, meaning that every item of freight rests on another item or against the limits of the cargo area, for instance the front or rear wall, leaving no gap.
In practice, the cargo needs to be positioned tightly against the front wall, rear wall or side walls (impact edge of the pallet), with no gaps between the individual elements.
Gaps between individual load elements cannot be completely prevented, however, they must not be more than a few centimetres, otherwise they do not provide containment The gaps must then be accordingly filled, or the load must be secured using restraints.
Normally, a combination of containment and restraint is the easiest and most effective, as the elements of both methods complement each other.
Each trailer provides different prerequisites to contain loads, even if the load type does not normally permit this, such as pallets with sacks or fragile goods.
Aids include perforated rails in the floor of the vehicle, Joloda rails integrated and lowered into the floor, insertable stanchions, cross-beams etc. However it is also possible to block the load by means of belts or the trailer body
Rollcages enable different goods to be secured quickly, because the uniform sizes enable perfect form-fitting loads. In addition to the structural stability of the body, these include pallet stops for side fixing, transverse beams and telescopic rods to restrain through gaps in the load and within a height of 3m, a lifting roof to enable quick loading of 3 boxes placed on top of one another.
For certified tyre transport, the equipment must be complemented by 6 rows of support laths and 2 rows of steel slats on each side, in accordance with the Code XL certificate. A tensioning strap cross at each stanchion field holds the loose tyres longitudinally. Additional retention is provided by steel laths with a narrow perforated grid. Here, engaged transverse beams establish restrain a partial load.