2.9.1 The basic principle for the safe carriage
of timber deck cargo is to make the stow as solid, compact and stable
as practicable. The purpose of this is to:
-
.1 prevent movement in the stow which could cause
the lashings to slacken;
-
.2 produce a binding effect within the stow; and
-
.3 reduce to a minimum the permeability of the
stow.
2.9.2 Openings in the deck exposed to weather
over which cargo is stowed should be securely closed and battened
down. The ventilators and air pipes should be effectively protected(19).
2.9.3 Deck cargo should be stowed so that access
is provided to and from designated escape routes and spaces essential
to operation of the vessel, such as machinery spaces and crew's quarters,
as well as to safety equipment, fire-fighting equipment and sounding
pipes(18). It should not interfere in any way with the
navigation and necessary work of the ship(19).
2.9.4 When cargo is loaded voids may occur in
the stow between packages as well as between bulwarks or gantry crane
rails, etc., and other fixed constructions such as the hatch coaming.
2.9.5 Care should be taken to avoid the creation
of voids or open spaces when loading cargo. Voids, where created,
should be filled with loose timber or blocked by vertical H-frames
with required strength to avoid cargo shifting. The MSL for double
H-frames of different widths and dimensions are given in the table
below. The values apply to H-frames made of sound softwood timber
without knots.
Table 2.1 MSL (maximum secure
load) of H-Frames for different dimensions
Dimensions of battens
mm
|
MSL in kN of double H-frames with different widths
|
|
|
0.5 m
|
1.0 m
|
1.5 m
|
2.0 m
|
| 50 x 50
|
75
|
53
|
30
|
17
|
| 50 x 75
|
113
|
79
|
46
|
26
|
| 50 x 100
|
151
|
106
|
61
|
34
|
| 50 x 150
|
226
|
159
|
91
|
51
|
| 75 x 75
|
186
|
153
|
119
|
85
|
| 75 x 100
|
248
|
203
|
159
|
114
|
| 75 x 150
|
|
305
|
238
|
171
|
| 75 x 200
|
|
|
317
|
227
|
| 100 x 100
|
|
301
|
256
|
212
|
2.9.6 Timber deck cargo which substantially overhangs
(one-third of the package length) hatch coamings or other structures
in the longitudinal direction, should be supported at the outer end
by other cargo stowed on deck or railing or equivalent structure of
sufficient strength to support it.
2.9.7 For ships assigned and making use of a timber
load line, additional practices apply in accordance with the applicable
Load Lines Convention(19).