70Z04018QP30864_SOW_Structural_Repair_Work_Item.doc

55-ANB Hull 55115 Structural Repairs

1. The purpose is provide aluminum structure repairs for 55-ANB Hull 55115 (B Class), which include structural deck and hull inserts between frames 6-11, replacement of port handrails, repair of side deck box, and repair of 1 mooring bit. All repairs are on the port side only.

2. References.

2.1. Coast Guard Drawing 55B-ANB-0103-001, Outboard Profile and Arrangements

2.2. Coast Guard Drawing 55B-ANB-1101-001, Construction Profile Plan & Sections

2.3. Coast Guard Drawing 55B-ANB-1101-002, Construction Details

2.4. Coast Guard Drawing 55B-ANB-500-001, Lines and Offsets

2.5. Coast Guard Drawing 55B-ANB-3901-001, Insulation Application & Details

2.6. Surface Forces Logistics Center Standard Specification 0000, General Requirements

2.7. Surface Forces Logistics Center Standard Specification 0740, Welding and Allied Processes

2.8. Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Coatings and Color Manual

2.9. NAVSEA S9086-CH-STM, Naval Ships Technical Manual (NSTM), chapter 074, Vol. 3, Gas Free Engineering

3. Requirements.

3.1. General. All work shall be completed in accordance with referenced drawings and documents.

3.2. Protective measures. The Contractor shall furnish and install suitable covering to seal off and protect all non-affected surfaces/equipment and spaces in the vicinity of the work area against contamination during the performance of work. Upon completion of work, remove protective material and inspect for the presence of contamination. Clean all equipment and spaces, contaminated due to improper protection, to original condition of cleanliness. Contractor shall obtain Gas Free certificate as required.

3.3. Temporary Access. No temporary access through structural members is required. However, insulation and other interferences shall be removed in the vicinity of hot work. After work is completed, insulation and other interferences shall be re-installed or replaced using Ref 2.5.

3.4. Environmental Compliance. Contractor shall dispose of all fluids and no longer used equipment and materials in accordance with all federal, state and local regulations.

3.5. Materials.

3.5.1. Government Furnished Equipment (GFE): None.

3.5.2. Unless otherwise noted, all materials except those listed as GFE shall be installed by the Contractor furnished and shall be as shown on the drawings listed in Section 2.

3.5.3. Aluminum material grades shall be the same as existing.

3.6. Removals

3.6.1. Remove D-ring fendering on port side in way of areas to be repaired, and retain for reinstallation. Also retain and reused fender fasteners and stainless steel flat bars that are not damaged or otherwise unusable.

3.6.2. Remove aluminum deck plating and side plating sheer bar as shown in Figure 1 and Figure 2 to accommodate structural inserts. This will also remove remainder of hand rail stanchions at the deck at FR 6.75 and FR 8.

3.6.3. Remove remainder of fillet weld at top of port side mooring bitt located at FR 6.25.

3.6.4. Remove remainder of port side hand rails stanchions at the deck at FR 4.25 and FR 5.5.

3.6.5. Remove port deck box lid and retain.

3.6.6. Remove all damaged deck box structure, leaving just the inboard longitudinal plating.

3.7. Repairs

3.7.1. Fabricate and install 3/16” thick aluminum deck plating insert, approximately 72” x 22”, as shown in Figure 1 using Ref 2.1 and Ref 2.2. Insert shall butt to existing bitt insert plate as shown. Insert longitudinal seam shall be at least 3 inches away from existing deck stiffener.

3.7.2. Install ½” x 6” aluminum sheer bar insert, 80” long (FR 8 to approximately center of mooring bit at FR 6.75), as shown in Figure 2 using Ref 2.1, 2.2 and 2.4.

3.7.3. Fabricate and install new port side hand rails between FR 8 and FR 4. It consists of aluminum 1.25” IPS for the 4 vertical stanchions and two horizontal rails as shown in Ref 2.1. Additionally, each stanchion has two aluminum flat bar brackets at the deck and a total of 4 staples to attached temporary chain. Template dimensions and material sizes from starboard side hand rail, which is mirror image.

3.7.4. Fabricate and install complete structure for port deck box, except for existing inboard longitudinal plating using Ref 2.2. Any missing details can be templated from starboard deck box.

3.7.5. Repair deck box lid as necessary and install to port deck box.

3.7.6. Reinstall D-ring fendering to sheer bar on port side using retained and new stainless steel hardware and 3/16” x 1.5” stainless steel flat bars as necessary using Ref 2.3.

3.7.7. Install new cap plate (3/8” thick) on top of port side mooring bitt located at FR 6.25 using Ref 2.2.

3.8. Quality Assurance.

3.8.1. Welding acceptance shall be performed in accordance with Ref 2.7.

3.9. Safety.

3.9.1. The Contractor is responsible for accomplishing the installations in a safe working environment. Before any hot work is begun, all areas are to be made SAFE FOR HOT WORK and certificates posted by the work area in accordance with NAVSEA S9086-CH-STM, Chapter 074, Vol. 3, Gas Free Engineering. Maintain the areas in a certifiable condition for the duration of the work.

Figure 1 – Deck Plating Insert, Stbd Side – Lkg Down

Figure 2 – Sheer Bar Insert, Port Side – Lkg Inboard

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12-06-2017 NAS for SBPL