[Title 46 CFR 42.25]
[Code of Federal Regulations (annual edition) - October 1, 2006 Edition]
[Title 46 - SHIPPING]
[Chapter I - COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)]
[Subchapter E - LOAD LINES]
[Part 42 - DOMESTIC AND FOREIGN VOYAGES BY SEA]
[Subpart 42.25 - Special Requirements for Vessels Assigned Timber]
[From the U.S. Government Publishing Office]
46SHIPPING22006-10-012006-10-01falseSpecial Requirements for Vessels Assigned Timber42.25Subpart 42.25SHIPPINGCOAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)LOAD LINESDOMESTIC AND FOREIGN VOYAGES BY SEA
Subpart 42.25_Special Requirements for Vessels Assigned Timber
Freeboards
Sec. 42.25-1 Application of this subpart.
(a) The provisions of this subpart 42.25 apply only to vessels to
which timber load lines are assigned.
[CGFR 68-60, 33 FR 10067, July 12, 1968]
Sec. 42.25-5 Definitions of terms used in this subpart.
(a) Timber deck cargo. The term ``timber deck cargo'' means a cargo
of timber carried on an uncovered part of a freeboard or superstructure
deck. The
[[Page 49]]
term does not include wood pulp or similar cargo.
(b) Timber load line. A timber deck cargo may be regarded as giving
a vessel a certain additional buoyancy and a greater degree of
protection against the sea. For that reason, vessels carrying a timber
deck cargo may be granted a reduction of freeboard calculated according
to the provisions of Sec. 42.25-20 and marked on the vessel's side in
accordance with the provisions of Sec. 42.13-30(c) and (d). However, in
order that such special freeboard may be granted and used, the timber
deck cargo shall comply with certain conditions which are laid down in
Sec. 42.25-15, and the vessel itself shall also comply with certain
conditions relating to its construction which are set out in Sec.
42.25-10.
[CGFR 68-60, 33 FR 10067, July 12, 1968, as amended by CGFR 68-126, 34
FR 9016, June 5, 1969]
Sec. 42.25-10 Construction of vessel.
(a) Superstructure. (1) Vessels, shall have a forecastle of at least
standard height and a length of at least 0.07L. In addition, if the
vessel is less than 328 feet in length, a poop of at least standard
height, or a raised quarter deck with either a deckhouse or a strong
steel hood of at least the same total height shall be fitted aft.
(b) Double bottom tanks. (1) Double bottom tanks where fitted within
the midship half length of the vessel shall have adequate watertight
longitudinal subdivision.
(c) Bulwarks. (1) The vessel shall be fitted either with permanent
bulwarks at least 39\1/2\ inches in height, specially stiffened on the
upper edge and supported by strong bulwark stays attached to the deck
and provided with necessary freeing ports, or with efficient rails of
the same height and of specially strong construction.
[CGFR 68-60, 33 FR 10067, July 12, 1968, as amended by CGFR 68-126, 34
FR 9016, June 5, 1969]
Sec. 42.25-15 Stowage.
(a) General. (1) Openings in the weather deck over which cargo is
stowed shall be securely closed and battened down. The ventilators shall
be efficiently protected.
(2) Timber deck cargo shall extend over at least the entire
available length which is the total length of the well or wells between
superstructures. Where there is no limiting superstructure at the after
end, the timber shall extend at least to the after end of the aftermost
hatchway. The timber shall be stowed as solidly as possible, to at least
the standard height of a superstructure other than a raised quarter
deck.
(3) On a vessel within a seasonal winter zone in winter, the height
of the deck cargo above the weather deck shall not exceed one-third of
the extreme breadth of the vessel.
(4) The timber deck cargo shall be compactly stowed, lashed, and
secured. It shall not interfere in any way with the navigation and
necessary work of the vessel.
(b) Upright. (1) Uprights, when required by the nature of the
timber, shall be of adequate strength considering the breadth of the
vessel; the spacing shall be suitable for the length and character of
timber carried, but shall not exceed 9.8 feet. Strong angles or metal
sockets or equally efficient means shall be provided for securing the
uprights.
(c) Lashings. (1) Timber deck cargo shall be efficiently secured
throughout its length by independent overall lashings spaced not more
than 9.8 feet apart. Eye plates for these lashings shall be efficiently
attached to the sheer strake or to the deck stringer plate at intervals
of not more than 9.8 feet. The distance from an end bulkhead of a
superstructure to the first eye plate shall be not more than 6.6 feet.
Eye plates and lashings shall be provided 23\1/2\ inches and 4.9 feet
from the ends of timber deck cargoes where there is no bulkhead.
(2) Lashings shall be not less than \3/4\-inch close link chain or
flexible wire rope of equivalent strength, fitted with sliphooks and
turnbuckles, which shall be accessible at all times. Wire rope lashings
shall have a short length of long link chain to permit the length of
lashings to be regulated.
(3) When timber is in lengths less than 11.8 feet the spacing of the
lashings shall be reduced or other suitable
[[Page 50]]
provisions made to suit the length of timber.
(4) All fittings required for securing the lashings shall be of
strength corresponding to the length of the lashings.
(d) Stability. (1) Provision shall be made for a safe margin of
stability at all stages of the voyage, regard being given to additions
of weight, such as those due to absorption of water and icing and to
losses of weight such as those due to consumption of fuel and stores.
(e) Protection of crew, access to machinery spaces, etc. (1) In
addition to the requirements of Sec. 42.15-75(e) guardrails or life
lines spaced not more than 13 inches apart vertically shall be provided
on each side of the deck cargo to a height of at least 39\1/2\ inches
above the cargo.
(f) Steering arrangements. (1) Steering arrangements shall be
effectively protected from damage by cargo and, as far as practicable,
shall be accessible. Efficient provision, shall be made for steering in
the event of a breakdown in the main steering arrangements.
[CGFR 68-60, 33 FR 10067, July 12, 1968, as amended by CGFR 68-126, 34
FR 9016, June 5, 1969]
Sec. 42.25-20 Computation for freeboard.
(a) The minimum summer freeboards must be computed in accordance
with Sec. Sec. 42.20-5 (a) and (b), 42.20-13, 42.20-15, 42.20-20,
42.20-25, 42.20-30, 42.20-35, 42.20-60, and 42.20-65, except that Sec.
42.20-60 is modified by substituting the percentages in Table 42.25-
20(a) for those given in Sec. 42.20-60:
Table 42.25-20(a)--Percentage of Deduction for Superstructure
[Total Effective Length of Superstructure]
----------------------------------------------------------------------------------------------------------------
0 0.1L 0.2L 0.3L 0.4L 0.5L 0.6L 0.7L 0.8L 0.9L 1.0L
----------------------------------------------------------------------------------------------------------------
Percentage of deduction for all 20 31 42 53 64 70 76 82 88 94 100
types of superstructure \1\.......
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\1\ Percentages at intermediate lengths of superstructures shall be obtained by linear interpolation.
(b) The winter timber freeboard shall be obtained by adding to the
summer timber freeboard one thirty-sixth of the molded summer timber
draft.
(c) The winter North Atlantic timber freeboard shall be the same as
the winter North Atlantic freeboard prescribed in Sec. 42.20-75(d)(1).
(d) The tropical timber freeboard shall be obtained by deducting
from the summer timber freeboard one forty-eighth of the molded summer
timber draft.
(e) The fresh water timber freeboard shall be computed in accordance
with Sec. 42.20-75(e) (1) or (2) based on the summer timber load
waterline.
[CGFR 68-60, 33 FR 10067, July 12, 1968, as amended by CGFR 68-126, 34
FR 9016, June 5, 1969; CGD 79-153, 48 FR 38650, Aug. 25, 1983]