API STD 2CCU pdf free download

API STD 2CCU pdf free download.Offshore Cargo Carrying Units.
4 Design 4.1 General 4.1.1 A CCU shall have sufficient strength to allow loading and unloading in open seas from a ship deck with a sea state up to a significant wave height, H s , as follows: — for PSL 1 , lift from/to vessel in max H s = 3 m (1 0 ft); — for PSL 2, lift from/to vessel in max H s = 6 m (20 ft). 4.1.2 The design and minimum operating temperature for CCUs designed and fabricated to this standard shall be in accordance with 5.2. 4.1.3 CCU designs shall be assessed and confirmed to meet the minimum requirements—to include engineered drawings with the AISC Steel Construction Manual or international design and analysis calculations—verified, and stamped by a licensed professional engineer, class society, or recognized regional authority.4.2 Stability Against Tipping 4.2.1 To prevent CCUs from overturning (tipping) on a moving deck, they shall be designed to withstand the following minimum tilt angles in any direction without overturning as follows: — for PSL 1 , 1 5 degrees; — for PSL 2, 30 degrees. Cargo may be assumed to be evenly distributed, with center of gravity at one-half the height of the CCU. 4.2.2 For dedicated-purpose CCUs with a fixed center of gravity (e.g. bottle racks, service container, or tank container), the actual center of gravity shall be used. 4.3 Protruding Components 4.3.1 Protrusion on the outside of the CCU frame that can snag other structures should be avoided. Protrusions on the sides may be allowed if they will not result in snagging any other structure. Deflector plates may be used to mitigate potential snags. 4.3.2 Doors, handles, hatch cleats, etc., shall be placed or protected such that they do not snag the lifting set. 4.3.3 If supporting pads and fork pockets protrude below the bottom frame of the CCU, deflector plates shall be installed to prevent snagging. The CCU design should have provisions to minimize trapping of debris and to offset the potential of dropped objects. 4.3.4 Pad eyes may protrude above the top level of the CCU frame (see 4.7.6.1 .1 ).4.3.5 Stacking fittings, guides, and other structures that protrude above the top of the CCU frame shall be designed and located such that they will not catch on structures on the ship or on other deck cargoes during lifting operations. Stacking fittings should be designed such that they minimize the risk of damage to other CCUs or cargoes. They shall also be designed such that the damage to the stacking fittings does not cause damage to the pad eyes and lifting set. 4.4 Structural Design 4.4.1 CCUs shall be designed as structural frames (primary structure), with non-load-bearing cladding where necessary (secondary structure). Only the primary structure shall be considered in the design calculations. 4.4.2 For CCUs such as waste skips, tool boxes, etc., with quadrilateral shapes (with or without parallel sides) and with open-top or only a non-stressed cover above the bracing where the pad eyes are attached, the whole structure may be considered a primary structure, and the skip may be designed as a monocoque construction. 4.4.3 Connections between primary members shall be designed to provide continuity of the load path. 4.4.4 CCUs may be constructed such that part of the primary structure is removable. 4.4.5 Removable beams, walls, or covers shall be secured in such a way that they will not fall off, even if the securing device is damaged.API STD 2CCU  pdf download.