SEC Bremen: оборудования для крепления контейнеров
Longitudinal arrangement of containers on deck July 2014 © Technical alterations reserved 2.12 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. According to new CSS code (IMO 1352) a minimum gap of 750 mm has to be provide between containers resp. 600 mm between lashing plates. Thus the minimum gap between containers at typical 20’ lashing gap is 860 mm (1063 mm offset distance).
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