Page 137 - Practical Ship Design

104 Chapter 4

equally well be included in another group. The numbering is arranged so as to
leave group 1 for structure to conform to the cost estimate sheet in Chapter 18.

Group 2. Structure related
- structural castings or fabrications (sternframe, rudder, etc.)
- small castings or fabrications (bollards, fairleads)
- steel hatch covers
- W.T doors
This group is related primarily to overall ship size with length B.P., displacement
or steel-weight being suitable parameters.

Group 3. Cargo space related
- cargo insulation and refrigeration machinery
- cargo ventilation
- firefighting
- paint
- cargo fittings, sparring, ceiling eyeplates, etc.
- 3(a) plumberwork
This group is related to ship type but with this qualification cargo capacity may be
a suitable parameter.
Plumberwork was added to this group with some misgivings as its weight and
cost depend also on the accommodation, and it may be better to deal with it as a
separate item.

Group 4. Accommodation related
- joinerwork
- upholstery
- deck coverings
- sidelights and windows
- galley gear
- lifts
- HVAC
- LSA(lifeboats, davits, etc.)
- nautical instruments
- stores and sundries
- 4(a) electrical work
A suitable parameter for this group is the complement of crew and passengers, or
the deck area or volume of the accommodation spaces. Electrical work is tenta-
tively attached to this group but it may be better to treat this as a separate item as
suggested for plumberwork, as its weight and cost may be considerably affected by
the amount of deck machinery.