CONSTRUCTION OF 02 NOS STEEL PONTOONS (DUMB BARGE) FOR ICG JETTY VADINAR

Amount

Design, construction, transportation, installation at location where directed, testing, commissioning & vetting complete steel pontoons (Dumb Barge) as per following specifications:- (a) LOA - 30 mtr (b) Breadth - 06 mtr (c) depth molded approx - 02 mtr (d) Loaded draught approx - 01 mtr (e) GRT approx – 80 Tons (f) NRT approx -25 Tons (g) Number of W/T Bulk Head – 08 (h) LSA/FFA availability as per class (j) Material: IS 2062-2006 E-250 Quality B (k) Cylindrical fenders with Chains (l) 08 bollards and 08 fair leads (A) Structural steel (MS) Plate Material:- IS 2062-2006 E 250, Quality 'B' or equivalent as per class recommendations. (B) Fenders:- Sufficient fenders for berthing operations to be catered as per class regulations considering cylindrical fenders with chains, length-1200 mm, outer diameter 200 mm, inner Dia-100 mm at outer and inner end of Pontoons. Material-Neoprene Rubber. (C) Bollards and fair leads:- The pontoon will have minimum 08 bollards and 08 fair leads. Further, bollards are to be adequately dimensioned for the estimated towing pull considering the displacement. The thickness of the deck plating under the Bollard and other fittings need to be satisfying the class regulations. (D) Sacrificial Anodes:- Sacrificial Anodes as approved by classification society with appropriate size will be fabricated and provisioned on the Hull by the Yard. (E) Load testing:- Load Testing of all fixtures is to be performed in accordance with a recognized standard and the procedures, together with acceptance by class. Load test certificates and maintenance schedule for the steel pontoons and associated fittings required to be submitted by contractor for future reference. (F) Hard securing point:- Provision for laying of chain cable from floating pontoons shall be catered for securing with hard securing point on land. (G) Statutory Requirements:-(i) Class Certification (ii) Load certificate as applicable for bollards and fairleads. (iii) LSA/FFA Plan (iv) Builders Certificate (v) Trim & Stability Booklet/Certificate of Tonnage measurement

(vi) Original drawing for GA, shell expansion, tank layout, bilge ballast and de-flooding arrangement. (vii) Material specification certficate for Hull and sacrificial anodes. (viii) Inclining experiment report (H) Hull form & structure: (i) The pontoon should be of mono box hull type. The pontoon hull should be a completely welded structure with suitable fendering installed along its external perimater suitable for energy absorption. (ii) The structural arrangement framing system, floor, web, stiffeners etc of pontoon and scantling details to be duly approved by class. (iii) The weld strength/deposition of joints in the area of bollards and fititings would be adequate for safe usage of these fittings during various operations. The designed deck area is to be clear, uncluttered and well- laid out for ease of operations and movement. (iv) The hull structure of the pontoons should be designed to withstand the impact of the ship during the berthing alongside. The strenth of the structure and deck should be sufficient for the loads generated due to average initial impact load during berthing of the ship and also for the loads/stresses generated while rolling of the ship's hull due to wind/waves.

(v) The fendering of the pontoon should be based on rubber fenders. The berthing pontoon should be provided with suitable number of rubber fenders. Functionally, fenders should abosrb the berthing energy or impact of vessels and transmit a designed or calculated force to the structure, which shall not exceed the allowable hull stress of IBS. (J) Stability requirements:- (i) Stability standard of pontoon should be based upon the stability standard of classification society, a member of IACS/GMB (ii) International code of intact stability and inclining experiment should be based upon latest IMO resolution/Class Regulations (iii) Pontoon should be highly stable for breasting of jetty for berthing of multiple IBs (03-IBs) (iv) Should be highly stable for embarking/ disembarking of 75 persons from vessels on/off pontoons. (v) Highly stable for embarking/disembarking of pay loads up to 20-30 tonnes from jetty to IBS via pontoon or vice versa. (vi) Should withstand high sea swells and sea state up to 4 during mooring. (vii) The pontoons should have sufficient stability under normal operating conditions of cruising. (viii) Ballasting of the pontoons should be catered such that upon flooding of any single compartment, water tight integrity can be maintained in other unaffected compartment.

suryadipta Projects Pvt ltd (BID ID -3135932)