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TIE-DOWN STRAPS

How do I calculate the amount of lashing straps needed? (with and without an anti-slip mat)

During transportation, forces act on the load, especially during braking. As much as 80% of the weight of the load moves forward during braking. 50% of the weight breaks out to the left, right, and rear. An anti-slip mat (with a coefficient of friction of at least 0.6 μ) has a significant effect on the behaviors of these forces.


An example based on a load of 8,000 kg (center of gravity in the middle of the load).

Metal on wood
80% of 8000 kg                                     6400
0,4 μ (coefficient of friction) x 8000 kg    3200
Total forces to be absorbed:                    3200

   The necessary amount of tie-down straps*:
   3200: 320 = 10 tie-down straps

*To know the amount of tie-down straps, divide the total forces to be absorbed by the pre-tensioning force (Stf) of the tie-down strap.

Metal on anti-slip mat
80% of 8000 kg                                    6400
0,6 μ (coefficient of friction) x 8000 kg   4800
Total forces to be absorbed:                   1600

  The necessary amount of tie-down straps:
   1600 : 320 = 5 tie-down straps

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