Smarter Lashing

Securing containers safely is becoming a more complex endevour given the challenges introduced by larger containerships, higher container stacks, flexible bridges and increased stack weights. To address these complexities, ABS published the ABS Guide for Certification of Container Securing Systems (Lashing Guide) and offers companion software, ABS C-LASH®.



Central to the Lashing Guide is the nonlinear analysis procedure that represents a significant improvement over traditional formulas for container securing. Used with the ABS C-LASH software, the Guide helps users evaluate mixed, external and internal lashings at multiple tiers and multiple lashing points, twistlock gaps in both vertical and horizontal directions and the effect of lashing bridge flexibility.

The advanced ability to account for these variables allows owners and operators to make smarter and more informed decisions on cargo distribution and lashing arrangements.


ABS C-LASH uses a series of carefully developed and validated equations that take into account the nonlinearities due to lashing rods and twistlock clearances without the need for an iterative solution process.

The benefits of using the ABS C-LASH softeare include: 

  • Flexibility - All container, lashing rod, and twistlock properties and their connections are specified individually for each tier, providing the user with maximum flexibility in the analysis
  • Compatibility– C-LASH fully meets the requirements for nonlinear container stack analysis specified in the ABS Guide for Certification of Container Securing Systems and has been extensively tested against C-LASH Pro and state-of-the-art commercial finite element nonlinear solutions
  • Onboard application - Due to its accuracy, efficiency and reliability, the ABS C-LASH procedure is ideally suited for integration with onboard container loading instruments by means of a Dynamic-Link Library (DLL), allowing owners and operators to analyze hundreds of container stacks using a sophisticated nonlinear approach in just a few seconds




Applicable to any containership operating in the world today, ABS offers a service to analyze existing lashing systems utilizing ABS C-LASH software. By modeling an existing lashing arrangement using the most modern nonlinear analysis methodologies, we have the opportunity to identify possibilities for improvements in the cargo securing system.

ABS C-LASH supports designers, owners and operators in developing and maintaining smart lashing systems, reducing risks and increasing safety and operational efficiency.