Cargo lash to bar

Abstract

A beam which is a cargo lash to bar for connecting mobile equipment and other cargo to the deck of a roll on-roll off ship, which is a with multiple D-rings and apertures along its length for lashing to using twist lock connection.

Description

BACKGROUND OF INVENTION[0001] 1. Field of the Invention[0002] The present invention relates to a new mechanism, a bar which is a beam to lash cargo to, herein called the cargo lash to bar, for the fastening and restraining cargo to a transport vessel or vehicle, especially as used in lashing down mobile equipment to the deck of an intermodal cargo carrying roll-on / roll-off ocean going ship known as a RoRo, or for fastening to a tanker ship's weather deck. This application claims the benefit of Provisional Patent Application Ser. No. 60 / 071,648 filed Jan. 16, 1998.[0003] 2. Description of Prior Art[0004] The action of the sea imparts seven motions of force in three directions against a ship and its cargo. Where on land cargo lashing frequently encounters loading and unloading of dynamic forces, on the ocean cargo lashing experiences a reversal or combination of dynamic force loading. The consequence of such extreme conditions is that the load must be fastened down very well. Currentl...

AI Technical Summary

Problems solved by technology

As a result the cargomen who are stevedores, longshoremen, and ship's crew on the ship are frequently faced with the problem of inadequate tie down locations adjacent to the fastening points of most mobile equipment.

This results in multiple chains being stretched at odd angles to reach a single mounting location.

This agrivates the problems of lashing and can lead to lashing gear, D-ring, or deck sockets and bases breaking or tearing with the equipment dangerously coming loose at sea.

Many problems are encountered by ships cargomen when they attempt to fasten irregular shaped loads to a ship's deck.

All of these embodiments suffer from the same problem, that they mount and seat into the sockets built into the deck that are spaced too far apart for convenient, safe, and secure lashing in all cases at distances usually eight feet apart athwartship and twenty and forty feet apart fore and aft.

When a twist lock mounted D-ring breaks because multiple pieces of mobile equipment are lashed to a single overloaded point, all the equipment comes loose.

The result can be the dramatic loss at sea of adjacently fastened armored tanks or other cargo that break loose their rigging in rough seas.

When D-rings are welded to a ship's deck problems are incurred.

Welding to the deck is a permanent attachment which can be an encumbrance later on and be an obstruction for man and machines that causes a safety hazard.

Also, dragging a welder and all of it's equipment around a ship's deck to weld down and retrofit individual D-rings or repair broken D-rings is slow and labor intensive.

Welding is a severe optical hazard to ship's crew about the deck.

Welding also heats the metal of the deck in excess of 3,000 degrees F., which causes localized changes in the crystal structure of the base metal making it brittle and reducing the strength.

A ship's deck cannot be readily annealed.

Weld on D-rings are not able to be welded to the lower deck of most ships because the bottom side of the lower deck is the fuel hold or fuel tank.

To weld to the lower deck requires the costly procedure of evacuating the space with an inert gas or risking major fire or explosion.

However the shoring beam system of Allen has a single securing set screw fastener which is too light duty to be of consequence to the heavy shipping industry.

People in the mobile equipment shipping industry are clear, there is a whole lot of money being spent shoreside for load preplanning and logistical processes to make efficient stowage but when mobile equipment cargo gets to the ship it is not loaded according to the plan because of the impediments of the use of old style lashing gear exacerbating the problems of inadequate deck tie down lashing points.

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