Оборудование для морских перевозок SEC Bremen

Longitudinal arrangement of containers on deck Ship`s Equipment Centre Bremen GmbH May 2011 © Technical alterations reserved 2.14 In general there are two solutions for the longitudinal arrangement of containers when 20’ containers shall be stowed with lashing gap in between. Very often it can be seen that containers are arranged asymmetrically with 5 rows of foundations per 40’ bay only. Despite of the cost saving effect for a minimum quantity of foundations and reinforcements this solution has several disadvantages. 40’ lashing at asymmetrical end has to be made 3- dimensional which can have negative effect on the efficiency of lashings. The lashing plates have to be inclined about 10° or even more in direction of containers. The wider the lash-ing gap between 20’ containers is, the more difficult it is to cover all lashing positions with unified length of lashing rods. In some cases it might be necessary to install additional lashing plates at asymmetrical end between 20’ and 40’ foundations, if so stevedores have to shift turnbuckles each time when loading 20’ instead of 40’ and opposite. For this reason we recommend to arrange the containers symmetrically in longitudinal direction resulting in 6 rows of foundation per 40’ bay. This solution brings best results concerning the arrangement of lashing plates and unified lashing length. Even in case of large lashing gap between 20’ containers no additional lashing plates have to be arranged and no shifting of turnbuckles by stevedores is required. Australian Maritime Safety Authority (AMSA) specifies a minimum gap of 550 mm between 20’ containers regardless of the lashing but at the same time they recommend a clear width of 550 mm between lashing plates. Despite of safety authorities SEC recommends a minimum gap of 750 mm between containers for proper lashing operation.