Section 1 Offshore Crane Units

101. General

1. Application

The requirements in this Section apply to offshore work units.

2. Definition

Offshore crane unit is a unit engaged in the operation for the lifting of heavy loads in oil and production operations or offshore construction.

drilling

102. Hull Construction and Equipment

1. Hull construction and equipment of the offshore crane units are to be in accordance with quirements in Ch 3 to 6, depending on the type of the unit.

the re-

2. In longitudinal strength calculation of a barge type offshore crane units, where calculating ĚĪ of the ship for any operating condition of the cranes, the bending moment by waves, which is the first

term in ｛ ｝in the formula ĚĪ in

may be taken as zero. In this case,

3. Details and strength calculations of

Ch 4, 201. 1 of "Rules for the Classification of Steel Barges" however, the coefficient is to be taken as 8.36 instead of 6.63.

crane pedestal and supporting structure are to be submitted for

review. Allowable stresses are defined in Ch 4, Sec 3.

103. Machinery

1. The machinery of offshore crane units is, in general, to be in accordance with the requirements in

Ch 10.

2. As for the machinery of barge-type offshore crane units, the relevant requirements in Ch 10 may be applied, as a restricted service unit.