Transport Guidance for Steel Cargoes
Stowage principles by cargo type
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- Figure 5.4 ; (8) any small gaps found between stacked coils should be filled with wooden chocks (wedges) as shown in Figure 4.1
| 5.5 Stowage principles by cargo type
5.5.1 See Table 3.1, Common steel products transported by ship, descriptions and general stowage considerations. 5.5.2 Additional stowage measures for particular types of steel cargoes. 5.5.2.1 Steel coil 2 . Coils are normally loaded and stowed from “outboard to inboard”, i.e. starting from the vessel’s side shell moving inward towards the center of the hold with each coil being placed against the next outboard coil already in place, with the “eye” of the coil pointing in a fore and aft direction. When stowing steel coils, the following considerations should be taken into account: (1) the heaviest, longest and largest coils should be loaded on the lower tier to prevent damage to any smaller coils that may be stowed on tiers below. Usually the coils with the same length should be stowed in the same row, if possible; (2) the number of tiers of steel coil to be loaded is dependent upon a number of factors including the vessel’s longitudinal strength, double bottom strength, local inner bottom 2 The stowage, lashing and securing of steel cargoes in containers is not addressed in this guidance. For further information regarding the stowage of steel coils in containers, please refer to Transport of Steel Materials in Containers. TT Club, StopLoss 13 -2016. American Club: Transport Guidance for Steel Cargoes 47 strength and the weights and dimensions of individual coils. The number of tiers for various coil weights may be set out in the vessel’s Loading Manual; (3) athwartships rows of coils should be spaced in the longitudinal, fore and aft direction anywhere between 4 inches (10 cm) to 6 inches (15 cm) apart; (4) with regard to the distances between the cargo hold’s longitudinal stiffeners, ensure that the distribution of the coils, as seen in Figure 4.1, ensures that as many of the contact points of the bottom tier coils are stowed over longitudinals as possible (so the longitudinals become “loaded”) and limit, as much as possible, the number of coils stowed between longitudinals (“unloaded”); (5) if it is intended to stack heavy coils, in excess of 15 tons (15 tonnes), in more than a single tier, the vessel’s Loading Manual or the classification society should be consulted to ensure the vessel has sufficient tank top strength to carry such heavy coils in more than one tier; (6) if only a single tier of coil is loaded, a “key” or “locking” coil should be placed in the space between non-adjacent coils as shown in Figure 5.2 that locks the tier in position. The key/locking coil is most effectively placed at the center of the row unless otherwise unable to do so, but should not be placed on the sloping surface of the hopper/sloping wing tanks; (7) as a rule of thumb, if the gap between the two coils to be locked is greater than 60% of the diameter of the locking coil, it is recommended that two locking coils are used as shown in Figure 5.3. If the width of the gap is too great and the locking coil will sink lower, then wooden dunnage can be placed between the coils to reduce the gap and raise the position of the locking coil. The locking coil’s diameter should not be more than one-third (1/3) of its diameter into the gap of the two adjacent coils below as shown in Figure 5.4; (8) any small gaps found between stacked coils should be filled with wooden chocks (wedges) as shown in Figure 4.1; (9) if additional cargo is to be stowed on top of steel coils, consideration should be given to the weights of that cargo so as to not deform the coils beneath or exceed the allowable weight limit at that point. Also, any additional cargo stowed on top should be stable and necessary lashing and securing to the cargo properly arranged. tải về 1.97 Mb. Chia sẻ với bạn bè của bạn:
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