Calculation example based on practical case 1

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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)

http://bookshop.europa.eu/en/cargo-securing-for-road-transport-pbMI0614080/?CatalogCategoryID=h4QKABstrmIAAAEjv5EY4e5L

http://bookshop.europa.eu/en/cargo-securing-for-road-transport-pbMI0614080/?CatalogCategoryID=h4QKABstrmIAAAEjv5EY4e5L

http://www.iru.org/en_bookshop_item?id=378

http://www.iru.org/en_bookshop_item?id=378

http://www.tya.se/home/in-english/quick-lashing-guide


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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

http://www.formation-arrimage.com/contact/


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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)

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Calculation example based on practical case 1

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