0118_A_PUMP_ROOM_LADDER_FABRICATE_AND_INSTALL_(TALT_098).docx

USNS TRENTON (T-EPF 5)

PUMP ROOM LADDER FABRICATE AND INSTALL (TALT 098)

1.0 ABSTRACT

1.1 This item describes the requirement to fabricate and install an aluminum ladder in accordance with reference drawing to be installed on Pump Room 7 and 8.

2.0 REFERENCES/ENCLOSURES:

2.1 1749113 Inclined Ladders, Aluminum Assemblies & Details

2.2 8443364 F General Arrangement

2.3 ENCLOSURE (1) Picture of Space indicating ladder location.

3.0 ITEM LOCATION/DESCRIPTION

3.1 Pump Room 7 and 8, 1-51-1 and 1-51-2

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICE: None.

5.0 NOTES: None.

6.0 QUALITY ASSURANCE REQUIREMENTS

6.1 The contractor shall perform static weight test of the installed ladder using 300 lbs. test weight placed in each ladder steps. Prior to and after weight test, perform PT testing on weld joints.

6.2 All welding shall be done in accordance with the references and specifications outlined in the 0101 level Structural items in this work package.

7.0 STATEMENT OF WORK REQUIRED

7.1 Furnish services of Marine Chemist to certify spaces for “Safe for Man” and “Safe for Hot work”. Ladder installation is welded to the top of the lube oil tank, with fuel storage forward of the lube oil tank.

7.2 Perform actual measurements on Pump Room 7 and 8 for the location of the ladder to ensure ladder fabrication shall be in accordance with Reference 2.1 to ensure that ladder shall conform with the form, fit and function.

7.3 Contractor shall perform modification on the handrails on the upper platform to be able to install the ladder as indicated on the enclosure (1).

7.4 Contractor shall utilize an ABS certified aluminum welder to perform the ladder fabrication and installation of all appendages onboard. 5083 or 5086 aluminum is suitable for fabrication.

7.5 Using reference 2.1 as guidance, fabricate the ladder using aluminum as material on all components of the ladder including ladder connection lug on the top and bottom of the ladder connection.

7.6 Contractor shall install staples between stanchions located on top and mid-section of the stanchions on the ladder opening on top platform and install stainless steel removable chain. Chain shall serve as a fall protection when ladder is not in use.

7.7 Upon completion of ladder assembly on Pump Room 7 and 8, perform static weight test using 300 lbs. of weights placed on each ladder steps. Hold weights for 15 minutes. Remove weights and perform PT test on all weld joints of the ladder steps and connections lugs on upper and lower of the ladder to check for weld cracks or indications.

8.0 GENERAL REQUIREMENTS: None.

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