0108__TOW_MODIFICATION_TLT-026_Specification.doc

USNS SPEARHEAD

( EPF 1 )

1.0 ABSTRACT

This item describes the installation of forward mooring and towing bitts and chocks along with the associated structural deck and hull modifications necessary to provide adequate structural support.

2.0 REFERENCES/ENCLOSURES

2.1 References

2.1.1 MSC DWG 582-8496116 Rev -, FORWARD TOWING AND MOORING FITTING INSTALLATION.

2.1.2 MSC Drawing 803-7080803_A CAD Drawing Standard

2.1.3 NSTM Chapter 634, Deck Coverings, General, S9086-VG-STM-010

2.1.4 Austal Test Report 630-582-09-201TR, Mooring and Fitting Static Load Test Instruction

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location / Quantity

3.1.1 Location: 01 Level, Fr C to Fr 1, Port and Starboard.

3.1.2 Quantity: Two (2) towing and mooring bitts and two (2) bulwark mounted Panama chocks.

3.2 Item Description/Manufacturer’s Data

3.2.1 Bill of Materials:

a. See List of Material in Reference 2.1.1.

b. Self-adhesive non-skid conforming with Reference 2.1.3, 3M 710 Safety Walk Black or equal, 100 sqft total.

3.2.2 Quantities are considered estimates. The contractor shall provide exact quantities and additional material such as weld material, cable hangers, cable tags, bus work, etc., which are not included in the Bill of Materials, in order to install a fully functional system which meets the requirements of this specification.

4.0 GOVERNMENT-FURNISHED EQUIPMENT/MATERIAL/SERVICES:

4.1 Government Furnished Equipment (GFE):

4.1.1. QTY two (2), cast aluminum bulwark mounted Panama chocks shown as Item #1 in Reference 2.1.1.

4.2 Government Furnished Material (GFM): None.

4.3 Government Furnished Services (GFS): None.

4.4 Government Furnished Information (GFI): None.

5.0

NOTES

5.1 The Contractor and all Subcontractors, regardless of tier, must consult the General Technical Requirements (GTRs, to determine applicability to this work item. In performance of this work item, the Contractor and all Subcontractors, regardless of tier, must comply with the requirements of all applicable GTRs, including but not limited to GTRs 1-7, 28, and 29.

5.2 The Contractor and all Subcontractors, regardless of tier are advised to review all other work items under this contract to determine their effect on the work required under this work item.

5.3 This ship contains High Voltage (HV) electrical systems. The Contractor and all Subcontractors shall obey all posted and verbal instructions regarding safety and exclusion from High Voltage areas. At no time shall a Contractor or Subcontractor approach, work on, or enter a High Voltage area without proper authorization.

5.4 Materials not listed as Government Furnished in Part 4.0 shall be furnished by the Contractor. The Contractor shall provide all labor and material required to accomplish this work item including but not limited to staging, space certification, contamination containment, full penetration welds, fire watches, removal and reinstallation of all interferences including insulation and deck coverings in way of repairs to effect a complete and finished end result.

5.5 Minor deviations from the drawings are authorized if the appearance, function, and strength are not impaired. Submit a Request for Deviation (RFD) to the MSCREP for approval for any areas that appearance, function, and strength are impaired.

6.0 QUALITY ASSURANCE REQUIREMENTS:

6.1 All work, testing and materials shall be in accordance with the latest SOLAS regulations, ABS Rules, USCG Requirements, IEEE-STD-45 and to the satisfaction of and in the presence of the ABS Surveyor (if required, Manufacturer’s Representatives (as necessary), and MSC Representative (MSCREP).

6.2 All welding requirements shall be accomplished by certified welders and meet ABS requirements. All welders shall be certified to perform the type of welding required and documentation of such shall be current. Fire watches shall be posted by the Contractor during hot work.

6.3 ABS and MSC Representatives are to be notified prior to conducting tests in Section 7.7.

7.0 STATEMENT OF WORK REQUIRED

7.1 Arrangements/Outfitting:

7.1.1 Removals: None.

7.1.2 Modifications:

a. Relocate pipe stowage fittings, twenty (20) per ship that are in way of the bitt and chock installation. Fittings are near frame B on both the port and starboard side. MSCREP will provide new location.

7.1.3 Installations:

a. Install the towing and mooring bitts and bulwark mounted Panama chocks using Reference 2.1.1 as guidance.

7.2 Structure:

7.2.1 Removals:

a. Cut and remove plating and supporting structure using reference 2.1.1 as guidance. Provide temporary support structure as needed to ensure the proper support and alignment for the overhead deck and bow during removal.

7.2.2 Installations:

a. Fabricate and install structure and plate using reference 2.1.1 as guidance.

7.3 Mechanical / Fluids:

7.3.1 Removals: None.

7.3.2 Installations: None.

7.4 Electrical:

7.4.1 Removals: None.

7.4.2 Modifications: Relocate electrical cable trays located under 01 Level deck as necessary to accommodate the installation of the new structure listed in Reference 2.1.1.

7.4.3 Installations: None.

7.5 Electronics: None.

7.6 Preparation of Drawings:

7.6.1 Update Reference 2.1.1 to reflect the As-built condition in accordance with Reference 2.1.2 and provide copies in both AutoCAD 2007 and .pdf formats to the MSCREP.

7.7 Inspection / Testing:

7.7.1 Inspection and acceptance of material and work shall be witnessed by the ABS Surveyor and the MSCREP. At a minimum the following testing shall be conducted. The bitts and chocks shall be load tested to the SWL of 100,000 lbs and held for 10 minutes while looking for signs of deformation and cracking. 100% of the welds shall be inspected using 5X visual inspection (VT). 50% of welds shall be inspected using penetrant testing (PT). 100% of the welds that create a watertight enclosure with the deck shall be tightness tested. The contractor shall also account for and perform any additional ABS required testing or inspection that may be required. Reference 2.1.4 is provided as guidance.

7.7.2 Provide materials and services for all of the required inspections and testing including (but not limited to) weld inspections, hull tightness inspections, and any required static load testing for newly installed fittings.

7.7.3 Provide written record of all testing performed to the MSCREP.

7.8 Painting and Insulation:

7.8.1 Install self-adhesive non-skid using Reference 2.1.3 and manufacture’s recommendations as guidance in way of new bitt and chock installation, approximately 100 sqft total for both sides. Non-skid shall cover the remaining deck forward of forward of frame 1 and the pattern/seams shall be consistent with the existing non-skid.

7.9 Marking:

7.9.1 Install name plates, notices, and markings for all new and modified systems (or areas). Provide bitt placards showing testing information and date. An additional placard shall also state Safe Working Load information (SWL: 100,000 lbs)

7.10 Manufacturer’s Representative: None

8.0 GENERAL REQUIREMENTS: None additional.

0108 - 1