calculation example based on practical case 1
DESCRIPTION
Calculation Tools There are various calculation tools available. This example illustrates how to determine the number of lashings required to safely secure a load, based on 2 calculation tools: Quick Lashing Guide Quick Calculation ChartsTRANSCRIPT
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Cargo Securing
Calculation example based on practical case 1
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Calculation Tools
• There are various calculation tools available. This example illustrates how to determine the number of lashings required to safely secure a load, based on 2 calculation tools:1. Quick Lashing Guide2. Quick Calculation Charts
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1. Quick Lashing Guide
• Availability– Appendix 2 of the
EUROPEAN BEST PRACTICES GUIDELINES ON CARGO SECURING FOR ROAD TRANSPORT
– Annex 3 of the International Guidelines on Safe Load Securing for Road Transport
– App for iOS and Android devices (search for keyword “Securing Cargo TYA”)
– Printed version (can be ordered on TYA’s website)
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1. Quick Lashing Guide
The values in the Quick Lashing Guide are based on the following assumptions:– Lashing points resist 2000 daN– Webbings have a Lashing Capacity (LC) of 1600 daN– Webbings have an STF of 400 daN– Lashing angles are between 75 and 90
If values are different, the results must be adjusted by a multiplication factor (indicated in the guide).
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Input Required – Part 1
• Check if the load restraint system meets the default values of the Quick Lashing Guide, i.e. for top-over lashing:– check that STF = 400– check that angle is between 75 and 90
In this case, both conditions are met, so no multiplication factor is required.
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Input Required – Part 2
Friction coefficient
Cargo weight
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Friction Coefficient
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Calculation – Step 1
The friction coefficient is
0.3
The cargo is not blocked
forwards
1 lashing secures 0.38
tons
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Calculation – Step 2
• Cargo weight front block: 6 tons– 1 lashing secures 0.38 tons– X lashings secure 6 tons– X = 6 / 0.38 = 15.8 = 16 lashings required
• Cargo weight rear block: 7 tons– 1 lashing secures 0.38 tons– Y lashings secure 6 tons– Y = 7 / 0.38 = 18.4 = 19 lashings required
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2. Quick Calculation Charts
• Availability– Available from AD Formation
• Notes– Multiple charts cover a variety of load mass and
lashing strength combinations, so there is no need to calculate any multiplication factor
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Front block
16 lashings secure the load
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Rear block
19 lashings secure the load
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Other calculation tools
Excel calculator (available to IRU Academy Accredited Training
Institutes, in English, Russian and French)
SpanSet App