Lashing straps - an important topic

The most common type of load securing is lashing. As a rule, lashing straps are used for this purpose. They are particularly suitable for securing sensitive goods. Short lever ratchets, also known as pressure ratchets, generally achieve a pretensioning force of up to 350 daN. By contrast, a pretensioning force of 500 daN and more can be achieved with a long-lever ratchet (pull ratchet).

Diagonal lashing

You can perform diagonal lashing in different ways. Four lashing devices are always required.

 

About the lashing angle: The required permissible tensile force of the lashing equipment depends on the lashing angles α and β for direct lashing. The lashing angle α is the vertical angle between the loading surface and the lashing equipment. It should be in the range of 20 to 65°. The horizontal angle β is the angle between the longitudinal direction of the vehicle and the lashing equipment, which should be in the range of 6 to 55°. The best values for securing forces can be calculated by determining the two angles α and β with a protractor. This often means that smaller lashing equipment can be used or higher load weights can be secured with the same lashing equipment.

Tie-down lashing

The most commonly used method of load securing is tie-down lashing. In this process, you force the load through the lashing equipment onto the loading surface, which increases the "micro-interlocking" and thus also the friction. The frictional force holds the load firmly on the loading area. When lashing down, your lashing equipment passes over the top of the load in the overtensioning position, hooks it onto the loading surface on both sides of the load - preferably in the lashing points - and tightens it with the tensioning element (e.g. a ratchet). The term "pretensioning force" refers to the force that the lashing equipment exerts on the load. It is applied only by the tensioning element of the lashing equipment.

 

About the lashing angle: In addition to the pretensioning force of the ratchet, the lashing angle α is also decisive for the pretensioning force of a lashing means. You measure this lashing angle in the vertical between the loading area and the lashing equipment. The lashing angle strongly influences the effective pretensioning force of the lashing equipment used. The smaller the lashing angle α, the lower the effective pretensioning force. Optimum pretensioning force of the lashing equipment is achieved with a lashing angle α of 90°. When lashing down, you should avoid a lashing angle of less than 30°.

Head lashing

The head lashing is used as a "headboard substitute" if the load cannot be loaded against the headboard due to the load distribution. Consequently, it is a form-fit load securing device in the form of a direct lashing. However, with this type of load securing, which is still relatively unknown in road traffic, you must ensure that the lashing is always held in position by the load part during transport and that it is permanently fixed to the vehicle.

 

You can apply a head lashing according to the following principles:

  1. You place a round sling (sling) around the front edge of the load in the direction of travel. You hook a lashing device into this round sling on each side of the load and connect it to the vehicle at a lashing point on the loading area (Figure 1).
  2. Place one edge attachment each on the front left and right upper edge of the load in the direction of travel. This edge attachment serves as a holder for the lashing equipment, which you now guide from a lashing point on the left side of the load, held by the edge attachment, to a lashing point on the right side of the load and connect to the vehicle in this way (Figure 2).
  3. Alternatively, you can also use a pallet standing on edge (Figure 3). The lashing then acts in the strapping

So much for the introduction to the topic of load securing and correct lashing. If you would like to learn more about this topic, you can find information in our free online guide:

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