7.1.1 When a unit is required to operate at a fixed location in ice conditions,
the designer/Builder is required to submit a rational analysis for determining the
maximum operating ice pressures on the structure based on acceptable environmental
data.
7.1.2 The minimum design temperature of the structure and steel grades will be
specially considered, see also
Pt 4, Ch 2 Materials.
7.1.3 The extent of additional strengthening will be specially considered by LR
and additional structural calculations for the primary structure will be
required.
7.1.4 When a unit operates in areas where there is the possibility of
collision with icebergs, appropriate data is to be submitted and the structure
suitably strengthened for the collision loads.
7.1.5 Special requirements will be required for sea inlet chests for machinery
cooling and fire pump suctions and reference should be made to the relevant text of
Pt 8, Ch 2 Ice Operations - Ice Class of the Rules for Ships. The design and
arrangement of sea inlet chests will be specially considered as applicable to the
type of unit.
7.1.6 When a unit has been reinforced and approved by LR for operating in ice,
a suitable descriptive note will be included in the Class Direct website.