Page 153 - Ship Construction.DJ Eyres 6Ed

Ch14-H8070.fm Page 142 Wednesday, October 18, 2006 6:56 AM
142 Ship Construction

Unit Erection ้เพื่อการศึกษาเท่านั้น---

งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี

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FIGURE 14.4 Cabin/toilet module

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When any panel and the block assemblies are complete there will be some
time buffer before their erection at the building berth, building dock or
within the building hall to allow for any mishaps in the production schedule.
Stowage is generally adjacent to the berth, dock or building hall and will
vary in size according to the yard’s practice, some yards storing a large num-
ber of units before transferring them to the berth or dock for erection in
order to cut the berth/dock time to a minimum.
Sequences of erection for any particular ship vary from shipyard to shipyard
and depend on a number of factors. Experience of previous ship erection
schedules and difficulties given the yard’s physical and equipment con-
straints leads to standard practices being established. These are taken into
consideration at the structural design stage as are the desirability of mini-
mizing positional welding and fairing. In general it is common practice to
make a start in the region of the machinery spaces aft, obviously working
from the bottom upwards, and also forward and aft. In earlier times this
was done to give the engineers and other outfit workers early access to
these spaces, but with the amount of pre-outfit this might not be considered
so important. However, this area does still require the larger amount of