scope:

1 Scope

1.1 This specification details the requirements for design, construction, and testing of pedestal mounted elevating and rotating lift devices of the types illustrated in Figure 1 for transfer of materials or personnel to or from marine vessels and structures. This specification is not intended to be employed for the design, fabrication, and testing of davits, and/or emergency escape devices.

1.2 Included are methods for establishing rated loads based on allowable unit stresses for load supporting components, as differentiated from power transmitting mechanisms. Also included are minimum requirements for equipment, materials, manufacturing procedures, and testing. Additional detailed requirements are included in the body of the specification.

1.3 Structural components covered by this specification are listed below, including some shown in Fig. 1.

a. Crane boom

b. Boom point sheave assembly

c. Boom tip extension or jib

d. Floating harness or bridle

e. Gantry, Mast or A-frame

f. Revolving upper structure

g. Swing circle assembly

h. Boom foot pin(s)

i. Sheave pin(s)

j. Boom splice bolts or connectors

k. Foundation bolts or fastenings

l. Pedestal or base

m. King post or Center Post

1.4 RECORD RETENTION

The manufacturer shall maintain all inspection and testing records for 20 years. These records shall be employed in a quality audit program of assessing malfunctions and failures for the purpose of correcting or eliminating design, manufacturing, or inspection functions which may have contributed to the malfunction or failure.