Transcript Lesson 6 decks and hatches

Lesson 6 Decks and Hatches
Contents
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Decks at different levels in a ship.
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Deck construction.
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Deck plating.
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Deck stiffening.
Lead-in
Look at the picture and point out the following places: main deck,
second deck, compass deck, boat deck, bridge deck, poop deck.
Language knowledge
1.
compass deck
2.
bridge deck
3.
boat deck
4.
accommodation deck
5.
poop deck
6.
forecastle deck
7.
cargo deck
1.
watertight deck
2.
strength deck
3.
freeboard deck
4.
lighter deck
各种船型英文缩写
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BC:Bulk Carrier 散货船
COT:Cargo Oil Tanker 货油轮
DFF:高速渡轮
ERRV:救援船
FLNG:浮式液化天然气船（科代
替岸上传统的液化天然气工厂）
FPSO:浮式生产储油船
FPV:浮式生产设备
G-Cargo Ship:杂货船
LNG:液化天然气船
Roll-on/Roll-off ship:滚装船
UCLL: Ultra Large Crude Carrier:
超大型原油轮
LEG:液化乙烯汽船
LPG:全压式液化石油汽船
LSV:驳运支援船
LR成品油轮:stands for large
range,远程成品油轮
MR成品油轮:stands for
medium range,中程成品油轮
OSV:Offshore Support Vessel,
海洋工程船
PSV:平台供应船
PC:重型石油化学制品运输船
PCC:Pure Car Carrier 汽车运输
船
PCTC:Pure Car & Truck
Carrier 大型轿车卡车专用船
RO-RO SHIP:客滚船
WORD FORMATION
Prefix: dis1. disable
2. disadvantage
3. disagree
4. disappear
5. disapprove
6. disclose
7. disconnect
8. displace
en1. enable
2. encourage
3. encounter
4. enclose
5. endanger
6. engulf
7. enrich
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Grammar:
Ellipsis
1. The stringer plate (i.e. the strake of deck plating
adjacent to the sheer strake) of ships less than 260m in
length is of Grade B steel if the thickness is more than
15mm, Grade D if more than 25mm thickness over the
amidships region and within the cargo hold region of
container ships.
2. and on superstructure decks the plating thickness
may be further decreased within deckhouses, if
sheathed, before fitting any form of sheathing the deck
is treated to prevent corrosion between the deck plating
and sheathing.
Grammar
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Independent Nominative Structure
1. The weather decks of ships are cambered, the
camber being parabolic or straight.
2. Within the forward 7.5 percent of the ship’s length,
the forecastle and weather deck transverses are closely
spaced and the longitudinal scantlings increased, the
additional transverse and longitudinal stiffening forward
being designed to avoid buckling of the deck plating on
impact when shipping seas.
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Watertight decks are fitted to maintain the integrity of the main
watertight hull and the most important is the freeboard deck which is
the uppermost deck having permanent means of closing all openings
in the exposed portions of that deck. Although all decks contribute to
some extent to the strength of the ship, the most important is that
which forms the upper flange of the main hull girder, called the
‘strength deck’.
Weather decks may be covered with wood sheathing or an approved
composition, which not only improves their appearance, but also
provides protection from heat in way of any accommodation.
Both longitudinal and deck beam scantlings are increased in way of
cargo decks where forklift trucks, and other wheeled vehicles which
cause large point loads, are used.
In ways of the hatches fore and aft side girders are fitted to support
the inboard ends of the half beams, and transverses. At the ends of
the hatches heavy transverse beams are fitted and these may be
connected at the intersection with the hatch side girder by horizontal
gusset plates. Where the deck plating extends inside the coamings of
hatches amidships the side coaming is extended in the form of tapered
brackets.
Bird’s view of deck
construction
Assignment
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1.
2.
Memorize the language points .
Extended readings
Where will the heaviest deck plating be
found?
Name the decks at different levels in a ship?