Utilisateur:CocoAdventure/Brouillon

Lashing Bridge

Definition

A robust metal shape hooked up among hatches to allow the stowage of a further tier of packing containers or heavier packing containers withinside the top tier. Lashings may be carried out at a better degree however also can continue to be short.

History

In the evolution of maritime cargo handling, the concept of lashing bridges has emerged as a pivotal solution to the challenges posed by the increasing dimensions of container ships. In the earlier days of container shipping, vessels were relatively small, and container stacks on the deck could be adequately secured by lashing them directly to the deck. However, as container ships grew in size and capacity, the height of container stacks escalated proportionally, reaching heights that exceeded the feasibility of direct lashing to the deck.

To address this challenge, the concept of lashing bridges was introduced. The concept of lashing bridge emerged in the late 20th century , as an intermediate structure designed to facilitate the secure lashing of container stacks, which could potentially reach towering heights of up to 12 tiers per stack. These structures provided a practical solution, allowing for efficient and secure cargo stowage and securing on the deck of increasingly larger vessels.

Lashing configuration

Internal Lashing

In internal lashing, lashing rods are anchored from the inside of the container.

External Lashing

Over the past five years, there has been a notable shift towards external lashing as a quasi-standard practice, particularly on larger vessels. External lashing not only enables operators to transport heavier loads but also offers enhanced flexibility and efficiency in cargo handling. In external lashing, lashing rods are anchored from the outside of the container.

Lashing bridge stiffness and reinforcment

Lashing bridge stiffness and solidity is important to maintain the anchor point of the lashing rods in place. If the lashing bridge is flexible, it will deformed under the loads of the moving container stacks.

The vertical stiffness is mainly due to pillars. The transverse stiffness is most of the times reinforced by bracings and shear plates.