502 EM 385-1-1 Sections 14-19

16.L.02 Design & Construction Standards. The lifting equipment on floating cranes, crane barges and on ships (shipboard cranes) must be designed and constructed in accordance with one of the following standards:

1. ANSI/ASME B30.8;
2. American Bureau of Shipping (ABS) Guide for Certification of Cranes, or
3. American Petroleum Institute (API) Specification 2C.

16.L.03 LHE Manufacturer's Floating Service Load Chart.

1. Manufacturer's Floating Service Load Chart. A LHE Manufacturer's Floating Service Load Chart must be provided. The Load Chart must be in accordance with all criteria from the selected standard in Section 16.L.02.
• (1) The Floating Service Load Chart must provide a table of rated load vs. boom angle and radius.
• (2) The Floating Service Load Chart must also provide the maximum allowable machine list and trim associated with the tabular loads and radii provided.
2. Floating Service Load Chart if Manufacturer's Floating Service Load Chart is not available, a floating service load chart may be developed and provided by a qualified RPE, competent in the field of floating cranes. The Load Chart must:
• (1) Be in accordance with all criteria from the selected standard in Section 16.L.02;
• (2) Provide a table of rated load vs. boom angle and radius;
• (3) Provide the maximum allowable machine list and machine trim associated with the tabular loads and radii provided;
• (4) Be stamped by a RPE, qualified and competent in the field of floating cranes. The RPE, competent in the field of floating cranes must, stamp and certify (sign) that the Naval Architectural Analysis (NAA) meets the requirements of Sections 16.L.03.

16.L.04 Stability During Lift Operation.

1. During lift operations, the stability of the floating LHE, or vessel and shipboard crane must meet the requirements for "lifting" as set forth in 46 CFR 173.005 through 46 CFR 173.025, over the full range of crane slewing angles.
2. During lift operations, the stability of the floating LHE, or vessel and shipboard crane must limit floating platform heel and trim such that the resultant LHE list and trim over the full range of LHE slewing angles are within the limits identified in the LHE Floating Service Load Chart.
3. A minimum of 12 in (0.3 m) of freeboard must be maintained during lift operations, over the full range of crane slewing angles.
4. The entire bottom area of the floating platform must be submerged for all lifts, over the full range of crane slewing angles.

16.L.06 Floating Service Structural Analysis.

1. The floating platform structure must be adequate for the loads applied from lifting over the full crane slewing range.
2. For vessels which are not built for the application, a structural analysis must be provided to document the structural adequacy of the floating platform in conjunction with applied LHE loads, for the lift amounts as developed in the NAA. Deck loads and environmental loads must be applied as part of the structural analysis.
3. Where established floating platform design structural capacities, such as allowable deck loads, are available, these may be used in support of the structural analysis.
4. The structural analysis must be stamped by an RPE, competent in the field of floating LHE. The RPE must stamp and certify (sign) that the Floating Service Structural Analysis meets the requirements of Sections 16.L.04 and 16.L.05.
5. The lift amounts developed in the NAA must be reduced if the structural analysis shows insufficient structural capacity at the NAA loads. The amount of reduction must be as required for the structural capacity.

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