Description Details :
SECTION 1 - GENERAL
1.1 Intent & Definition
This specification together with the drawing is to describe the construction of a double swing end
unmanned deck cargo and ballast tank barge suitably equipped for carrying deck for unrestricted
services.
1.2 General Description
The Barge shall be constructed as a steel deck cargo and ballast tank barge for unrestricted ocean
service. The hull shall be arranged with a shaped bow, anchor rack, raked stern with skegs.
The hull is to be divided by 7 transverse watertight bulkheads and 2 longitudinal watertight
bulkheads into 24 ballast compartments.
1.3 Principal Particulars
Length overall 250'-0〞（76.20m）
Bean moulded 80'-0〞 ( 24.384m )
Depth moulded 16'-0〞 (4.877m)
Deck Loading 20.0 T/M2
1.4 Classification
The vessel is designed suitable for registration as a deck cargo and ballast tank barge and
constructed in accordance with the latest rules and regulations of BV (hereinafter referred to as
Classification or Class) for Unrestricted Services and to their special survey to hull for class for
Unmanned deck cargo and ballast tank barge.
Notation Symbol: PONTOON I HULL.
1.5 Certification & Registration
The following Original certificates should be supplied to the Owner in duplicate before the
delivery of the vessel in Shanghai for the Buyer’s registration purposes. Should original and the
duplicated copies not available, certified true copy is not acceptable:
1) Builder Certificate;
2) Class Certificate;
3) Safety Construction Certificate;
4) Tonnage Certificate;
5) Loadline Certificate;
6) Stability Booklet.
1.6 Welding
Except where specified otherwise, electric welding shall be employed in the construction of the
vessel. All welded constructions shall be shown on the approved plans and in accordance with the requirements of the Classification Society for construction of steel vessels. The entire internals
shall be fully continuous welded both sides. All electrodes used shall be of approved by the
Classification Society.
1.7 Materials & Workmanship
All material and workmanship are of the good quality .All steel plates, section, full forging and
castings are to meet BV Classification.
1.8 Inspection
Throughout the construction period and at anytime prior to the delivery, the classifications Surveys
and Owner’s representatives are to be given free access, within normal working hours, to the
builder’s yard for supervision and inspection.
1.9 Test
Prior to the delivery, the hull and other fittings are to be thoroughly tested to be satisfaction of the
classification’s attending surveyor.
1.10 Stability
A lightship measurement will be conducted which will ascertain the lightship weight and the
vertical centre of gravity at lightship condition, is to be carried out by the Builder’s with the
presence of the classification surveyor. Based on these results, a stability report is to be prepared
by Consultant.
1.11 Delivery
Delivery of the vessel is to be taken afloat at a mutually agreed site after completion.
1.12 List of Drawings
The below listed drawings and documents to be sent to Class for approval. The original approved
plans and documents to be provided to owner.
i). General Arrangement;
ii). Specification
iii). Construction Drawing;
iv). Skeg Details;
v). Welding Schedule;
vi). Stability booklet;
vii). Draft Marks;
SECTION 2 - STRUCTURE
2.1 General
The steel hull and deck erection are of all welded construction. Longitudinal framing system is used.
The deck scantlings are to be designed to suit 20T/M2 loading.
2.2 Scantlings
Deck plate 16mm
Bottom plate 12mm
Side shell 12mm
Longitudinal BHD 10mm
Transverse BHD 10mm
Deck longitudinal L150X90X10
Bottom longitudinal L125X75X10
Side longitudinal L125X75X10
Long. BHD longitudinal L125X75X10
Transverse stiffener L125X75X10
Deck transverse FL500X12/150
Deck girder FL500X12/150
Bottom transverse (floor) L400X10/150
Bottom girder L400X10/150
Side web frame L500X10/100
Long.BHD web L500X12/150
Stanchion H200X200X8/12
Diagonals FL260X 260X16/L180X180X16
Bilges chine Φ50 round bar
SECTION 3 –Outfitting
3.1 General
All deck machinery and equipment are supplied by Seller and installed to meet Classification’s
requirements.
3.2 Deck Fittings
Mooring Bollards
8 Twin bitts, 10’’ N.B. Pipe recessed mooring bollards are to be fitted on main deck as shown on
the GENERAL ARRANGEMENT PLAN.
Towing Brackets
Towing bracket with SWL of 40T each at bow and aft of portside and starboard to be installed.
Anchor winch
One (1) diesel-driven anchor winch of approximately 10 tonnes capacity, the drum shall be
capable of stowing 150m x 36mm dia. galvanized wire rope.
Anchor
One (1) 1590kg Stockless Bower Anchor.
Winch house
Winch house with windows to be provided.
Anchor Wire Rope
150m x 36mm dia. Anchor galvanized wire rope with dia. 34mm x 3m, U2 anchor chain to be
supplied and installed.
Chain Stopper-One (1) unit chain stopper to suit the chain size to be fitted.
Manhole
1 manholes is to be provided for each tank, size of manhole to be 600mm x 400mm clear opening
and flush type. Studs and nuts to be 316 stainless steel.
Fender
Two (2) rows of 6’’ Φ, Sch. 80 half round pipe to be fitted on port and starboard sides
Navigation Lights
A complete set of navigation lights are to be provided as follows:
*stern light *Bow light (p&s)
SECTION 4 – PAINTING & CATHODIC PROTECTION
4.1 Raw Material – Plates, Angles, I beams, etc. (all steel) at shop (before fabrication)
Surface preparation
If necessary, degreasing and washing down with freshwater to remove oil/grease contamination.
Abrasive blasting to SA 2.5 Swedish Standard
Ensure that substrate is free from dust, dirt, salt, oil, other contamination.
Coating system D.F.T Recoating Time
1 F/C MUKL Z No. 2001 FW 30 microns 1 hour
At site (after fabrication)
Surface preparation
If necessary, degreasing with A-410 heavy duty alkaline cleaner and washing down with freshwater
to remove oil/grease and salt contamination.
Allow surface to dry thoroughly prior to mechanical power cleaning welding seams and damages
areas to ST3 Swedish Standard. Thereafter, wipe clean with solvent using cloth/rags.
Ensure that substrate is free from dust, dirt, salt, oil, other contamination.
4.2 Painting schedule
All steel surfaces (on both sides) are to be shot blasted SA2.5 and primed before fabrication with one
(1) coat of shop primer as above.
Paint in ballast tanks to be one year anti-rust guarantee.
Pint of out side below light weight water line to be three years anti-fouling guarantee.
Paint maker to be of JOTUN, IP, HEMPEL or other equivalence.
6.2 CATHODIC PROTECTION
50 pcs, 15Kg each, aluminum anodes to be welded on the immersed loaded hull as cathodic
protection.
2 pcs , 15Kg each, aluminum anodes to be welded in each ballast tank.
