FA Gangway Replacement B.docx

Gangway Replacement

1. Scope

1.1. Provide a replacement gangway while utilizing the existing ships stair tower, and replacing the connections to the ship.

1.2. Provide replacement Port and Starboard gangway Davits that suit the new gangway.

2. References

2.1. IMO MSC Circular 1331 Guidelines for Construction, Installation, Maintenance and Inspection/Survey of Means of Embarkation and Disembarkation

2.2. Drawing: FA –S0201-1: Booklet Of General Plans

2.3. Drawing: NOAA 48 Brow Platform PWC 21A-20 REV A

2.4. Drawing: FA-603-00X: Gangway in Juneau, Ak

2.5. ISO 7061: 2015: Ships and marine technology- Aluminum Shore gangways for seagoing vessels

3. Government Furnished Material

3.1. None

4. Requirements (Gangway)

4.1. Provide and a complete gangway of the following type and construction:

4.2. All marine grade Aluminum, unless noted otherwise, welded construction.

4.2.1. Designed, constructed and tested IAW Reference 2.1 and 2.4.

4.2.2. Fabricated in one continuous length.

4.2.3. All fasteners, attachments, chains, pins, etc shall be 316L Stainless Steel, unless noted otherwise or required for load rating.

4.3. The gangway shall at a minimum be provided with the following features:

4.3.1. Length: 28’ – 30’, maximum width: 36”, minimum clear opening between handrails: 30”, minimum tread clearance between rails: 30”.

4.3.2. Handrails shall be removable, welded 1-1/2” Aluminum pipe in 4 removable sections per side. The top of the handrail shall be 42” above the walking surface, and an additional horizontal rail shall be provided mid-height. Three equally spaced staples shall be provided on each handrail at the ship and shore ends for the connection of safety chains as needed.

4.3.3. Removable safety net panels shall be provided in three approximately 6’ panels on each side of the gangway starting at the ships end and rated for a minimum of 600 lbs. When in use the safety nets shall be angled approximately 30 degrees up from the walking surface. All safety net material, lashings, lanyards, etc. shall be synthetic, high strength, marine grade and UV resistant.

4.3.4. Curved type Aluminum steps with integral slip resistant surface and shall allow for safe personnel transit along the gangway from -7 to +40 degrees from horizontal, see reference 2.4.

4.3.5. Bottom side of the gangway shall be closed in with continuously welded ¼” Aluminum expanded mesh.

4.3.6. End connections shall mate with GFM ship and shore side connections, see references 2.3. End connections shall be pinned. Ships connections will be of a padeye style.

4.3.7. Four welded lifting padeyes with 1” ID holes and reinforced bosses, two on each side of the gangway approximately 6’ from each end. Each padeye shall be angled inward to allow lifting straps to lead inboard of the handrails.

4.3.8. Two welded lifting padeyes with 1” ID holes and reinforced bosses, two on each end of the gangway approximately 6” from termination. Pad eyes are to be oriented vertically such that the end can be lifted from an overhead crane.

4.3.9. Removable solid PTFE dockside roller with removable, hinged cover plate to prevent personnel injury, to be used when the dockside platform is not in use. Roller shall be provided with sealed stainless steel bearings.

4.4. The gangway shall mate with, and operate properly under all conditions with the three current gangway location port and starboard on the ship: platform on the E-deck (boat level), G-deck (bridge) and F-deck (flybridge) (see reference 2.1 and2.4).

4.5. All sharp edges to be ground or broken smooth.

4.6. The gangway and all attached parts and accessories shall be provided with a minimum one year manufacturer warranty.

4.7. The maximum total weight of the gangway full assembled may not exceed 1300 LBS.

4.8. Design and build a turntable as an optional ship connection point, it needs to be easily stored and installed on the ship. Manufacture from marine grade Aluminum.

5. Requirements (Gangway Davits)

5.1. Design and provide a complete gangway davit system that is capable of lifting the gang way to all 3 positions; platform on the E-deck (boat level), G-deck (bridge) and F-deck (flybridge) (see reference 2.1 and 2.4). There will be a davit on the port side and one on the starboard and both will be mounted on g deck.

5.2. It must be able to lift the pier end of the gangway when attached to E or F deck to allow 5 foot stair tower to be attached.

5.3. Each Davit will have its own winch that is weatherproof. Power to the system will be 110 vac at 60 HR.

5.4. Each davit station will have a weatherproof hand held control unit. The cable will be long enough to reach each of the three connection points to each side of the ship.

5.5. Each Davit will be rated for 2 times the maximum load under the above stated conditions.

6. Quality Assurance

6.1. Provide a design package to the COR for review.

6.2. Provide weight test certification

6.3. Provide a written test procedure for ship use during every 5 year survey. Test procedure should be provided in hard copy and electronically.

6.4. Provide a technical manual, if applicable, as well as detailed gangway drawings, in hard copy and electronically.

7. Notes

7.1. COTR to approve final design prior to fabrication.

7.2. Vendor must demonstrate experience in building marine gangways under ISO 7061 requirements.

8. Delivery Date and Address

8.1. Deliver to NOAA Ship Fairweather 2002 SE Marine Science Drive Newport, Oregon 97365 no later than October 30, 2020.

END OF ITEM