Section 7: Technical Documentation

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Floating Cranes

MIL-HDBK-1038

Section 7:

TECHNICAL DOCUMENTATION

7.1

Purpose. The purpose and extent of technical documentation required by

Navy Crane Center in its contracts is to ensure that the crane design is the

product of competent designers and that adequate drawings and calculations are

available for future needs to verify or re-evaluate design details, assess or

repair damage, and facilitate alterations or improvements. Custom designed

assemblies and components must be supported by detailed calculations and drawings;

serially produced items must be adequately described by published commercial

literature.

7.1.1

Design Responsibility. All portions of the crane design must be

performed by, or under direct supervision of, a registered professional engineer

(PE) competent in the particular engineering discipline. Alternatively, the

completed crane design may be reviewed and approved by a PE who is the

contractor's employee or a consultant retained by the crane contractor for that

purpose. In either case, the PE must be intimately familiar with the crane

contract specification and the details of the proposed crane design. Every

drawing and set of calculations must be stamped and signed by a PE. The stamp and

signature must be original, or otherwise comply with the rules or regulations

pertaining to their reproduction in the state of the PE's registration.

PE licensing must be by a board or agency authorized to license and

7.1.2

Scope. The crane design calculations must, as a minimum, include

analyses for each identified load combination and operating condition or

configuration. The selection of standard, serially produced, components and

assemblies must be supported by their manufacturers' selection procedures. All

material must be fully identified including their condition, mechanical

properties, and allowable stress levels. Calculations must demonstrate that the

calculated stresses do not exceed the allowable values. Similarly, selection of

standard purchased assemblies and components, following the published methods of

selection or sizing, must demonstrate their adequacy for the imposed loadings.

The standard purchased items must be fully identified by manufacturer and part

number; and any additional information, such as material or test results, must

also be provided.

Additionally all alignment, torquing, and other assembly

procedures must be clearly specified on the drawings.

Drawings and calculations should be organized in a logical manner by

engineering discipline and level of detail. The technical documentation should

include drawings for assembly/disassembly of the crane or major components,

lubrication, and jacking arrangements.

Selection of critical items, such as rotate bearings, must include the

manufacturer's certification of proper selection for the intended service and the

identified load cases. Diesel engine-generator sets must be accompanied by a

torsional vibration analysis and certification that the set is free of critical

torsional frequencies in the normal operating speed range. Other items which are

required to comply with national, state, or local regulations (for example,

compressed air storage tanks) must be provided with appropriate certifications.

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