Page 222 - Ship Construction.DJ Eyres 6Ed

Ch19-H8070.fm Page 211 Wednesday, October 18, 2006 6:58 AM
Decks, Hatches, and Superstructures 211
Bulwark
Bulwark stay

Deck plating
Beam knee
--- ใช้เพื่อการศึกษาเท่านั้น---
Hatch Deck
coaming beams
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี

(a) TRANSVERSELY
FRAMED DECK
Side frames
Hatch side girder
Deck plating Hatch end beam
Pillar
ึ Deck longitudinals
Deck plating

Hatch
coaming

(b) LONGITUDINALLY
FRAMED DECK
Deck transverses

FIGURE 19.2 Deck construction

DECK PLATING The heaviest deck plating will be found abreast the
hatch openings of the strength deck. Plating which lies within the line of the
hatch openings contributes little to the longitudinal strength of the deck
and it is therefore appreciably lighter. As the greatest longitudinal bending
stresses will occur over the midship region, the greatest deck plate thickness
is maintained over 40 per cent of the length amidships, and it tapers to a
minimum thickness permitted at the ends of the ship. Locally the plating