Containership operation: 2 in 1 (Two in One) Loading Operations The term 2 in 1 operation is normally used when two 20feet units are loaded in one 40feet bay underdeck. When such loading operation is being conducted, it must be ensured that the terminal staff is aware of the vessels lashing system. In most cases twist stackers or equivalent lashing gear will require to be used for such loading Under Deck. Two very typical kinds of damages may result from 2 in 1 loading operations if not planned and executed carefully. Firstly, as per cargo securing manual, some vessels will require to place Sliding Base Cones at the bottom for loading containers in hold. When changing from 40feet stowage to 20feet stowage or vice versa, stevedores will have to go down inside the hold for inserting/removing sliding base cones as required. If Sliding Base Cones are not inserted before loading 20feet containers, the stack will not be secure and may be liable to shift enroute. Alternatively, if Sliding Base Cones are not removed before loading 40feet containers (after discharging 20feet containers), bottom rails of the 40feet container will be damaged by these base cones. Secondly damages may occur due to 20feet containers not being set properly on the base cone. If a 40feet container is loaded over a stow of 20feet containers underdeck, this 40feet container will be damaged if the 20feet containers below are not properly set on the base cones and therefore protruding upwards. Cargo holds where 2 in 1 operations are in progress, must be monitored by cargo Watch personnel and they themselves must be familiar with the peculiarities of such operation and possible damages that may result. Vessels cargo securing manual and loading manual shall be consulted to obtain such information as to maximum tiers of 20feet containers that may be loaded underdeck before capping by a 40feet container. Any other stipulated restrictions also must be complied with. Related articles How to load maximum number 20 feet container on deck ? What are the extra precaution should be taken prior loading a 45 feet container on deck ? Container damage in ''2 in 1'' cargo Operation Modern containership & loading of various container types How to load containers coming in different forms/sizes Our additional pages contain somewhat larger lists of resources where you can find useful informations Other Info Pages Home Our home page Container Ship Operation Basic guidance Cargo stowage and planning How to plan effctively Cargo care at sea Precautions to be taken Reefer cargo handling Troubleshoot and countermeasures DG cargo handling Procedures & Guidelines Cargo securing Check items prior departure port Safe Cargo operation Various guidelines Hull strength & stability Prior loading how to ensure hull strength & stability of ship stevedores injury How to prevent injury onboard Site Map Page listing for this site. Site Use and Privacy - Read our privacy policy and site use information. Contact us Copyright © 2009 Ships business.com All rights reserved.