Amendment 5-20220826.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

Answers to RFI's 92-106 (RFI Group 5) Revised Sections C101, C150, C155, C330, C601, H12 and H14 Corrected sections will be included in a "cut-and-paste" format. The affected sections will be corrected in the final award. All other terms, conditions, specifications and requirements remain the same.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 35

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street , County, State and Zip Code) X W912BU22R0045

X 9B. DATED (SEE ITEM 11)

26-May-2022

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO.

5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

26-Aug-2022

CODE

US ARMY ENGINEER DISTRICT, PHILADELPHIA

CONTRACTING DIVISION

WANAMAKER BUILDING

100 PENN SQUARE EAST

PHILADELPHIA PA 19107-3390

W912BU 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912BU22R0045

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE

The following have been added by full text:

AMENDMENT 5

RFI Group 5

92. As-Builts - The contractor will need to develop production design deliverables consisting of a 3D production design model and extracted drawings. Some of these are required Phase II deliverables such as the 3D Structural Model (849-C300-01), the scanting plan installation drawings (849-C305-01, etc.), and the piping system installation drawings (849-C630-01, etc.). However, some of production design deliverables are not required Phase II deliverables such as the 3D production model, pipe spool drawings, bending templates, stock reports, and electronic NC cutting files. The RFP does not require the contractor to submit these production design drawings as part of Phase II Engineering; they are not part of the RFP required Phase II drawing list. The Phase III H14 section however requires any drawing developed by the contractor to be updated to as built condition and submitted to the USACE. Does the USACE require the 3D production model, pipe spool drawings, bending templates, stock reports, and electronic NC cutting files as part of the H14 as built requirement?

a. USACE Response: Drawings developed by the Contractor refers to the drawings produced as part of Contract Paragraph H12. Additional drawings developed by the Contractor for their production purposes are not required to be updated to as-built level and are also not required to be submitted to the Government for review and approval.

93. As-Builts - Amendment 002 added native calculation files as a deliverable requirement.

Native calculation files often include proprietary calculation procedures; for example GHS run files include proprietary macros and class scantling Excel files calculations are initiated using proprietary Excel file templates. Also, many calculations are performed as part of designing a ship and all its associated equipment but only some of these calculations are required by the H12 Phase II deliverable list. Can you please provide a list of what specific native calculations are required to be submitted?

a. USACE Response: Native files are only files associated with the dredge constructed through this solicitation, the Government will at its own expense purchase any software required to run native files. Please see revised Contract Paragraphs C101, C150, and C155 for clarified requirements.

b. Proprietary information may be excluded from native files, however the Government will require sufficient information to validate contract requirements and to support future maintenance, repair, and modification of the dredge for the life of the dredge.

94. As-Builts - Regarding Amendment 2 bidder’s question 40:

a. What are the safety related drawings?

b. What are the scientific calculations?

c. What is considered sufficient information for future maintenance and modifications for:

i. Structural systems? Sufficient could mean (A) just update the as built scantling plan layouts, or (B) do all of A plus update the 3D Structural Model and installation drawings, or (C) do all of A and B plus update the bending templates, stock reports, and electronic NC Cutting files. In this case, we recommend option A since that is typical in the shipbuilding industry.

ii. Piping systems? Sufficient could mean (A) just update the as built piping diagrams (mechanical schematics) for branch relationships, valve types and pipe sizes and the arrangement and details drawing to show where the valves are within +/- 2 feet, or (B) do all of A plus update the installation drawings for any piping hanger location changes, or (C) do all of A and B plus update the 3D production model and pipe spool drawings based on any pipe spool length changes. In this case, we recommend option A since that is typical in the shipbuilding industry."

d. USACE Response: Safety drawings refer to any drawings required to be posted throughout the dredge per regulatory requirements (ABS, USCG, and SOLAS), and drawings that are directly related to those drawings (e.g. the fire main drawing should accurately show locations of fire hoses and fire axes). Scientific drawings in this context refer to any drawings that affect the stability of the vessel and accurate representation of sizing is necessary for the operation of the dredge (e.g. the hopper capacity, fuel oil tank capacity, etc. shall be updated after incline). All other drawings in Contract Paragraph H12 shall be updated for the as-built condition, however tolerances within these conditions are allowable. The identified requirements in Item “B” for structural systems and Item “A” piping systems is sufficient for this requirement. Dredge system piping supports shall be included in as-built drawings in addition to this level of detail.

95. ASME Y14.24 - RFP Section H12 requires 849-C305-01 Scantling Plans, and also requires all the other C300 drawings. What content is unique to C305?

a. USACE Response: Question is unclear. Drawing 849-C305-01 shall include details and arrangements for the scantlings in the dredge as described by the drawing title. The drawings in the C300 Contract Paragraphs have been identified and are intended to capture the entire structural package for the dredge. These drawings are intended to validate contract performance requirements, regulatory design requirements, and facilitate future maintenance, repair, and modification of the dredge for the life of the dredge.

96. ASME Y14.24 – RFP Section H12 requires numerous ASME Y14.24 Installation Type drawings. ASME Y14.24 is not a common drawing standard in the shipbuilding industry.

The shipbuilding industry has developed industry specific construction processes and associated deliverable conventions over time. The ASME Y14.24 Installation drawing type is different in numerous ways and if applied will significantly increase shipbuilding construction deliverable costs with marginal added value.

a. The shipbuilding industry standard structural construction deliverable package includes stock reports, electronic NC plate cutting files with mark lines, profile plots, bending templates and Structural Assembly Drawings. One difference between industry standards and ASME Y14.24 is how structural parts are located.

Standard structural construction packages rely on mark lines on cut plate parts to locate other structure. ASME Y14.24 Installation drawings however require locating dimensions for all structural components. This would be a significant increase in drafted dimensions resulting in more drawing views and drawing sheets.

b. The shipbuilding industry standard piping construction deliverable package includes stock reports, spool drawings, and a Piping Arrangement and Details Drawing. Another difference between industry standards and ASME Y14.24 is how piping is installed. Standard piping construction packages rely on shipyard personnel to locate, size, and install most pipe hangers during construction.

ASME Y14.24 Installation Drawings however require location, size, and installation details for all pipe hangers. This would be a significant increase in drawing details resulting in more drawings view and drawing sheets.

c. A similar, recent ASME Y14.24 related requirement on another ongoing government maritime program resulted in the Contractor creating two complete installation drawings packages at great expense and with little value added, one for construction and one to satisfy the ASME Y14.24 requirements.

d. The RFP does not require any Phase II deliverables to only be provided as an Installation type. In all cases the Installation type drawing is an add on to another ASME Y14.24 drawing type. Further, RFP Section H14 requires any drawing developed by the Contractor to be submitted and therefore all Contractor format construction deliverables will be required to be submitted as part of the as-builts.

Considering all this, can the Installation Type drawing requirement be removed from the RFP?"

e. USACE Response: Per ASME Y14.24 “An installation drawing provides information for properly positioning and installing items relative to their supporting structure and adjacent items, as applicable.” The Government does not see these requirements as being contradictory with the stated shipbuilding industry practice from this RFI and therefore does not intend to remove this requirement.

f. These comments only apply to the drawings required per Contract Paragraph H12.

Other drawings developed by the Contractor are not required to be submitted to the Government for review. Government required drawings are intended to validate contract performance requirements, regulatory design requirements, and facilitate future maintenance, repair, and modification of the dredge for the life of the dredge. Please see revised Contract Paragraph H14 for clarified requirement.

97. ASME Y14.24 - RFP Section H12 requires 849-C305-01 Scantling Plans (and other C300 scantling drawings) to be ASME Y14.24 Installation type drawings. Shipyards typically build the hull structure using drawings referred to as Structural Assembly drawings based off a 3D structural model. These Structural Assembly Drawings are broken down by structural unit rather than by the drawing title associated with drawings C301-01 through C330-09. If the USACE insists on installation drawings broken down as listed from C301- 01 through C330-09 then the Contractor will need to create two sets of installation drawings, one set to build the ship (i.e. the Structural Assembly Drawings) and one set to satisfy the RFP C300 Installation Drawing requirements. It is recommended to reduce cost that the ASME Y14.24 Installation type be removed for all deliverables. However, if that is not possible then can the requirement for C301-01 through C330-09 installation drawings be removed? Can a new C300-05 Structural Assembly Packages deliverable instead be required of the Installation Type under which the Contractor can provide all the structural Installation type drawings in accordance with the Contractor determined structural unit breakdown?

a. USACE Response: The Government does not intend to remove the requirement for the required content in drawings C301-01 through C330-09, however the Contractor may satisfy these requirements through the submission of their structural assembly drawings. Structural assembly drawings submitted in this manner shall be reviewed per the same requirements as all drawings required in Contract Paragraph H12. Additionally, the Government will remove the requirement for these drawings to be Installation Type per ASME Y14.24. These drawings shall be revised to be Layout Type drawings, with the added note that they shall be “detailed design” drawings per ASME Y14.24 Paragraph 16.2(c).

Please see revised Contract Paragraph H12.

98. ASME Y14.24 - RFP Section H12 requires 849-C305-01 Scantling Plans (and other C300 scantling drawings) to be ASME Y14.24 Layout and Installation type drawings. The Layout type requires dimensional data to the extent necessary to convey the design solution used in preparing other engineering drawings. Installation drawings require positioning information. Neither requires drafted dimensions for hull or foundation cut plate part shapes or extruded member lengths. It is recommended to reduce cost that the ASME Y14.24 Installation type be removed for all deliverables. However, if that is not possible then please confirm that drafted dimensions for hull and foundation cut plate part shapes and extruded member lengths are not required.

a. USACE Response: Please see response to RFI 96 above for clarification on installation drawing submission.

99. ASME Y14.24 - RFP Section H12 requires 849-C305-01 Scantling Plans (and other C300 scantling drawings) to be ASME Y14.24 Installation type drawings. ASME Y14.24 Installation type drawings need to provide information for proper positioning. Shipyards typically build the hull structure using drawings referred to as Structural Assembly drawings based off a 3D structural model. These Structural Assembly Drawings often do not need to include dimensional data because the nest tapes include mark locations. It is recommended to reduce cost that the ASME Y14.24 Installation type be removed for all deliverables.

However, if that is not possible then can the USACE confirm that locating dimensions are not required on the 849-C305-01 Scantling Plans of the Installation type?

a. USACE Response: Please see response to RFI 96 above for clarification on installation drawing submission

100. ASME Y14.24 - RFP Section H12 requires piping system arrangement and detail drawings to be ASME Y14.24 Installation type drawings. ASME Y14.24 Installation type drawings need to include piping system hanger details. Piping system hanger details are not normally included in shipyard piping arrangement and detail drawings. It is recommended to reduce cost that the ASME Y14.24 Installation type be removed for all deliverables. However, if that is not possible then are piping system hanger details required in the piping arrangement and detail drawings?

a. USACE Response: If this in reference to ASME Y14.24, optional item 7.3(h), then for most piping systems hanger details shall not be required—in excess of typical details—however for dredging, hydraulic, and systems with piping greater than or equal to 4 inches in nominal diameter the pipe hangers or supports shall be included. Please see revised Contract Paragraph C601.

101. ASME Y14.24 - RFP Section H12 requires piping system arrangement and detail drawings to be ASME Y14.24 Layout type drawings. ASME Y14.24 Layout type drawings require envelop dimensions. Piping valve bodies are not normally depicted or dimensioned in shipyard piping arrangement and detail drawings. Instead, valves are depicted symbolically but with accurate flange sizes, flange locations and operator envelopes. Requiring valve bodies would require significant additional effort with negligible value. Are piping valve bodies require in the piping arrangement and detail drawings?

a. USACE Response: Piping valve body envelopes shall be provided for valve bodies greater than or equal to 6 inches in nominal diameter. Please see revised Contract Paragraph C601.

102. RFP Section C330 requires foundation drawings for all equipment. Shipyards typically only create foundations drawings for equipment above a certain weight or size minimum. Small bulkhead and ceiling mounted equipment do not generally get foundation drawings. Can a minimum equipment weight and size threshold be set below which foundation drawings are not required?

a. USACE Response: Equipment and machinery requiring foundation drawings shall only include any components weighing greater than 200 pounds, any overhead components weighing greater than 100 pounds, and any components mounted on vibration isolators. Please see revised Contract Paragraph C330.

103. RFP Section C330 requires structural calculations for all foundations. Shipyards typically only submit major foundation calculations for review by clients and class. Can the required foundation calculations required be identified?

a. USACE Response: Foundation calculations shall only include any components weighing greater than 200 pounds, any overhead components weighing greater than 100 pounds, and any components mounted on vibration isolators. Please see revised Contract Paragraph C330.

104. RFP page 387 to 389 Phase II drawing list entries 849-C670-02 and below drawing types may be incorrect. Should the 849-C670-02 type 'MS' be deleted, all type entries below that shifted up 1 row, and then 849-C800-01 be a type 'R'?

a. USACE Response: Please see revised Contract Paragraph H12

105. There are several USACE MCHD deliverables that specifically call for EasyPower software; C715 (Fault Current Analysis), C715 (Circuit Breaker Coordination), and C715 (Arc Flash Analysis). ETAP can do everything that the RFP requires EasyPower to do for this project. Can ETAP be used to perform this work as an alternative to EasyPower? Can ETAP file format be delivered as an acceptable alternative to EasyPower *.dez files?

a. USACE Response: USACE uses the software EasyPower and will not revise this requirement.

106. Section C770 Specific requirements state that “the contractor shall prepare 849-C770-02 RF SYSTEM DESIGN STUDY and 849-C770-03 ANTENNA ARRANGEMENT DRAWING in order to show minimization of antenna interference.” Can the Government please specify for the RF System Design Study what the requirement evaluation method and pass/fail criteria are?

a. USACE Response: The report shall consider mutual interferences between the multiple radio frequency systems installed on the vessel to evaluate the potential degraded operational performance. The manufacturer’s recommendations for antenna location, along with radiation patterns, transmitter power levels, isolation characteristics, and receiver selectivity and sensitivity shall be utilized to develop an acceptable arrangement and report. The report shall demonstrate each antenna is located in accordance with the manufacturer’s requirements (height, line of sight, obstructions, radio wave/bandwidth interference, etc.) and to avoid interference from other antenna, power and control sources. Please see updated attachments for Reference Drawing 793-D233-02.

C101 STABILITY CALCULATION SOFTWARE

GENERAL DESCRIPTION

None.

REQUIREMENTS

All stability calculations for the vessel shall be performed using General Hydrostatics (GHS), developed by Creative Systems, Inc. of Port Townsend, WA. The Contractor shall develop the geometry (.gf) file for the vessel. The same geometry file shall be used in all stability calculations. Stability related submittals shall include the GHS Run Files (.rf) used to set up the calculations, the GHS output Print Files (.pf), and a copy of the geometry file used for the calculations. The geometry file and all GHS calculations shall use Imperial units (feet, inches, long tons, etc.). A preliminary geometry file shall be reviewed and approved by ABS and the COR during Phase II. Following the inclining experiment, the geometry file shall be updated to reflect the final as-built condition and shall receive final approval from ABS.

SPECIFIC REQUIREMENTS

The geometry file defines the shape of the entire vessel. The hull form shall be developed from the Hull Lines & Offsets (see Contract Paragraph C105). The hull form shall be divided into watertight compartments as delineated by the vessel’s structural drawings.

The structure of the geometry file shall follow the recommendations of Creative Systems, including but not limited to the following:

a. The geometry file shall be organized in a hierarchy Parts are the highest level. There are three kinds of parts – Displacers (hull), Containers (compartments/tanks), and Sails (portions modeled only for the purpose of generating wind heeling moments) Each part is made up of one or more components (e.g. Hull, keel, skeg, etc.)

Components are defined by shapes Each shape is defined by one or more sections (2-D curves)

b. Components on the port side shall have the .p extension

c. Components on the starboard side shall have the .s extension

d. Components which span the centerline of the vessel shall have the .c extension.

The origin used in the geometry file shall match that of the Trim and Stability Book (see Contract Paragraph C161).

The geometry file shall contain definitions for all watertight compartments of the hull, including all integral and independent tanks. Watertight compartment definitions shall include the assigned permeability in accordance with USCG Rules. Tank definitions shall include the geometry of each tank, the assigned permeability, as well as the standard specific gravity of the tank contents.

The sounding tube for each tank shall be modeled in accordance with the as-built drawings.

Where curved sounding tubes are used on the vessel, they shall be modeled as such in the geometry file.

The geometry file shall contain deductions for all non-buoyant areas of the hull such as sea chests, cooler voids, thruster wells, etc. The geometry file shall also contain appendages for all buoyant additions to the hull.

The superstructure, cranes, stacks, and other areas contributing to the vessel’s wind profile shall be modeled as “Sail” parts. Such parts do not contribute to the vessel’s buoyancy/displacement but are considered for wind heeling moment calculations.

Shell thickness shall be included for all hull parts and components to ensure accurate displacement and volume calculations.

The geometry file shall contain any and all “Critical Points” used in the stability analyses.

The deck edge shall be marked at each station in the geometry file.

SPECIAL FEATURES

The hydrostatics and stability data generated by GHS and the vessel’s stability program (see Contract Paragraph C161) shall match within the tolerances specified by ABS MVR Part 3, Chapter 3, Appendix 7.

Following the API Survey of the hopper (see Contract Paragraphs C002 and C130), the Contractor shall adjust the geometry of the hopper in the GHS file as required to ensure that the volume and centers of gravity of the GHS file and the actual as-built hopper match within 1% over the entire range of hopper filling levels.

DELIVERABLES

849-C101-01 GHS GEOMTERY FILE (only to include geometry and output files)

STANDARDS

ABS Rules for Building and Classing Marine Vessels, Part 3, Chapter 3, Appendix 7: Computer Software for Onboard Stability Calculations

C150 DAMAGE STABILITY

The vessel shall meet all applicable damage stability criteria at all operational loading conditions as required per the regulatory bodies. The Contractor shall develop a damage stability analysis, damage control booklet and damage control plan in accordance with 46 CFR Subchapter I and

ABS MVR

REQUIREMENTS

Damage Stability Analysis During Phase II, the Contractor shall develop the damage stability analysis for all required loading conditions, with bi-monthly updates including among others any changes/updates in weight estimate & center of gravity, watertight boundaries and/or location of openings.

The analysis shall be reported in a file named and numbered as 849-C150-01 DAMAGE STABILITY ANALYSIS and be submitted to the COR for review and approval.

The initial version shall be submitted to the regulatory bodies as 849-C150-01 DAMAGE STABILITY ANALYSIS for review and (preliminary) approval.

The damage stability analysis will result in a max VCG or min GMT curve to prove that all loading conditions in the intact stability booklet (See Contract Paragraph C160) comply with the damage stability regulations.

The Contractor shall also develop and submit a preliminary damage control booklet and damage control plan to the COR and regulatory bodies during Phase II as 849-C150-02 DAMAGE CONTROL BOOKLET and 849-C150-03 DAMAGE CONTROL PLAN for review and (preliminary) approval.

Final Damage Stability Analysis Upon Delivery of the vessel, after the inclining experiment is complete and lightship values approved, the Contractor shall update the damage analysis and develop the damage control booklet with final weights and centers of gravity and as-built information.

The Contractor shall develop and submit a final damage stability booklet, to the COR and regulatory bodies named and numbered 849-D150-01 DAMAGE STABILITY ANALYSIS during Phase IV of the Contract for review and approval.

The damage stability analysis will result in a max VCG or min GMT curve to prove that all loading conditions in the intact stability booklet comply with the damage stability regulations.

The information in the damage control booklet and on the damage control plan, such as watertight boundaries, openings, etc. shall be updated during the design of the vessel and be verified after construction.

The Contractor shall develop and submit a final damage control booklet and damage control plan to COR and regulatory bodies as 849-D150-02 DAMAGE CONTROL BOOKLET and 849- D150-03 DAMAGE CONTROL PLAN during Phase IV of the Contract for review and approval.

SPECIFIC REQUIREMENTS

The analysis shall show compliance with the damage stability criteria of Chapter II-1 of SOLAS 1974, as amended by DR68.

Special attention shall be given to regulation 9 Chapter II-1 of SOLAS 1974 (“Reg. 9”). If an exemption from USCG is required for this vessel in order to comply with Reg. 9, the Contractor is responsible for receiving such an exemption during Phase II.

The damage stability analysis shall be executed using GHS (see Contract Paragraph C101).

Contractor shall provide all the native files (GHS model only to include geometry and output files) for the stability analysis with the COR.

SPECIAL FEATURES

None.

DELIVERABLES

849-C150-01 DAMAGE STABILITY ANALYSIS

849-C150-02 DAMAGE CONTROL BOOKLET

849-C150-03 DAMAGE CONTROL PLAN

849-D150-01 DAMAGE STABILITY ANALYSIS

849-D150-02 DAMAGE CONTROL BOOKLET

849-D150-03 DAMAGE CONTROL PLAN

STANDARDS

Chapter II-1 of the International Convention for Safety of Life at Sea (SOLAS), 1974 Guidelines for the Assignment of Reduced Freeboards for Dredgers, DR-68 rev. 1

C155 TRIM & INTACT STABILITY

The vessel shall meet all applicable intact stability criteria at all operational conditions as required per the regulatory bodies. The Contractor shall develop an intact stability analysis in accordance with the rules and regulations of Class and Flag.

REQUIREMENTS

Intact Stability Analysis During Phase II, the Contractor shall develop the intact stability analysis for all required loading conditions, with bi-monthly updates including among others any changes/updates in weight estimate & center of gravity and/or location of openings.

The analysis shall be reported in a file named and numbered as 849-C155-01 INTACT STABILITY ANALYSIS and be submitted to the COR for review and approval.

The initial version shall be submitted to the regulatory bodies as 849-C150-01 INTACT STABILITY ANALYSIS for review and (preliminary) approval.

At a minimum the analysis shall show:

a. Compliance of the vessel for all loading conditions as provided in Contract Paragraph C160.

b. A loading condition summary table including all loading conditions from Contract Paragraph C160 showing as a minimum: the name of condition, displacement, draft aft, draft mid, draft fore, trim, heel, GM and VCG.

The analysis shall show that for all operational loading conditions the vessel’s propellers, thrusters, weir boxes and sea inlets are submerged, and the inlet of the dredge pumps is below the waterline. Forward trim shall be not more than 3 feet. Heel shall be less than 0.5 degrees Port or Starboard for all operational loading conditions Final Intact Stability Analysis After the inclining experiment is complete and lightship values approved, the Contractor shall update the intact stability analysis with final weights and centers of gravity, and as built openings and watertight boundaries.

The Contractor shall develop and submit a final intact stability analysis to the COR and regulatory bodies named and numbered 849-D155-01 INTACT STABILITY ANALSYSIS during Phase IV of the Contract for review and approval.

SPECIFIC REQUIREMENTS

The stability analysis shall be executed using GHS (see Contract Paragraph C101). Contractor shall provide all the native files (GHS model only to include geometry and output files) for the stability analysis with the COR.

SPECIAL FEATURES

The vessel shall include “empty hopper” conditions for empty/dry hopper and also for hopper free flooded.

DELIVERABLES

849-C155-01 INTACT STABILITY ANALYSIS

849-D155-01 INTACT STABILITY ANALYSIS

STANDARDS

IMO International Code on Intact Stability 2008 Guidelines for the Assignment of Reduced Freeboards for Dredgers, DR-68 rev. 1

C330 FOUNDATIONS

None.

REQUIREMENTS

Suitable foundations shall be provided for all units of equipment and machinery to properly mount the item, to introduce the operational loads into the hull structure, and to avoid undue stresses and vibrations in the foundations and the hull (refer to Contract Paragraph C180).

Foundations shall be included in foundation drawings and calculations for all components and equipment weighing greater than 200 pounds, any overhead components and equipment weighing greater than 100 pounds, and any components and equipment mounted on vibration isolators.

Foundation members shall be provided with openings as necessary to permit access to all parts of the foundation for fabrication, inspection, drainage, and maintenance.

Web plates of foundations shall be duly stiffened at holding-down bolts and other points of load concentration.

During Phase II, the design drawings for all foundations, their integration into the vessel structure and any vibration and noise isolation system shall be developed and be submitted to the COR and ABS for review and approval.

The associated structural calculations shall be part of either 849-C399-01 STRUCTURAL CALCULATIONS REPORT or 849-C399-02 GLOBAL FEA REPORT pending Contractor’s choice to integrate the particular foundations structural analysis into the Global FEA Model.

For foundations of large items of equipment, dedicated individual FEA’s may be performed and be reported in dedicated individual documents typically numbered as 849-C330-XX FEA

REPORT XXX FOUNDATION.

SPECIFIC REQUIREMENTS

Fasteners Where there are no specific requirements are given by ABS or equipment manufacturers, all equipment and machinery shall be bolted to foundations using Grade #8 fasteners or better. The threaded portion of bolts shall be clear of the foundation or equipment pads. Heavy gauge flat and lock washers shall be used under all nuts. Elastic stop nuts may be substituted for lock washers except for securing rotating machinery. The nuts shall match the Grade #8 fasteners.

The Contractor shall provide and install machined fitted bolts where required by equipment manufacturer’s or regulatory requirements.

Vibration Isolators Vibration isolators shall be installed where required to meet Contract Paragraph C180 requirements.

Drip Pans Where dripping of water or oil can be expected, drip pans shall be provided below the equipment. These shall be fitted with drain plugs in accessible locations at the lowest point and quick disconnect fittings.

Diesel Engine Foundations The Contractor shall develop foundations for the diesel engines as identified in Contract Paragraphs C180 and C602.

The geometry of the diesel engine foundations shall permit the engine oil pan to be dropped down and positioned to allow access from below the engine for maintenance and repair.

Deck Crane(s) Foundations

The Contractor shall develop structural integration(s) for the pedestal(s) of the deck crane(s) identified in Contract Paragraph C455. The structural integration(s) shall be capable to support the loads specified by the Crane(s) Vendor and effectively distribute these into the vessel structure.

Dredge Equipment Foundations The Contractor shall develop local reinforcements for machinery and equipment dedicated to dredging, such as Dredge Pumps, Pump Drives, Dragarm Winches, Gantries, and the Bow Coupling Winch as identified in Contract Paragraph C500 and considering the requirements of Contract Paragraph C180.

The scantlings of the structures for attachment of the equipment intended for dredging operations (e.g. connection of the suction pipe to the hull, foundation of the dragarm gantries) are to be based on the service load of such equipment, as specified by the Designer or Vendor. In determining the above service load, the Contractor shall take into account additional loads imposed by ship movements (in particular pitch and heave) in the most unfavorable sea and weather conditions expected during service.

Deck Machinery Foundations The Contractor shall develop local reinforcements for deck machinery, such as but not limited to, the Anchor Windlasses, Mooring Winches, capstans, bollards, and davits.

Vessel Machinery Foundations The Contractor shall develop local reinforcements for all Machinery and Equipment of the Vessel systems, such as but not limited to Pumps, Filters, Compressors, Major Piping Electrical Transformers and Switchgear.

Lifting Provisions (see Contract Paragraph C200 and C290) Lifting pads shall be provided throughout the vessel for lifting of equipment as required during foreseeable removal for maintenance and repair or replacement.

Lifting provisions shall also be provided over sea chest hatches, transducer hatches, overhead deck hatches to facilitate equipment removal from below deck.

The Contractor shall prepare a proposal for positioning lifting provisions as required to facilitate removal of equipment and further mechanical handling. During construction, the COR may require additional lifting provisions to be installed.

The lifting padeyes and their supporting ship structure shall be designed to withstand the minimum ultimate load of the attached rigging assembly, based upon allowable stresses taken with respect to the structure's material yield strength, as defined in the latest version of the ABS Guide for Certification of Lifting Appliances.

Padeyes shall be specifically analyzed for stresses due to axial tension on gross and net sections, shear stresses including those due to tear-out, in-plane and out-of-plane bending stress, bearing and combined stress. The shear stresses, including those due to tear-out shall not exceed 0.4Fy.

The allowable bending stress shall not exceed 0.6Fy for in-plane (strong axis) bending moment, and 0.75Fy for out-of-plane (weak axis) bending moment, for solid rectangular sections.

Allowable tension stress shall not exceed 0.6Fy on gross section and 0.5Fu on net section.

Interaction ratio sum of actual to allowable axial tension and bending stress ratios, shall be evaluated, their sum shall not exceed 1.0. Bearing stress shall not exceed 0.9Fy. Combined stress shall be calculated in accordance with Hencky-von Mises (HVM) criteria. HVM combined stress shall not exceed 0.75 Fy. Supporting calculations shall be submitted with the lifting provisions drawing as 846-C330-10 LIFTING PROVISIONS CALCULATIONS during Phase II.

All lifting pads shall be identified and marked with their Safe Working Load.

SPECIAL FEATURES

None.

DELIVERABLES

849-C330-01 DIESEL ENGINES FOUNDATIONS

849-C330-02 DREDGE EQUIPMENT FOUNDATIONS

849-C330-03 ANCHORING & MOORING EQUIPMENT FOUNDATIONS

849-C330-04 LIFE SAVING EQUIPMENT FOUNDATIONS

849-C330-05 DECK CRANE(S) FOUNDATION

849-C330-06 VESSEL MECHANICAL EQUIPMENT FOUNDATIONS

849-C330-07 VESSEL ELECTRICAL EQUIPMENT FOUNDATIONS

849-C330-08 ENGINES EXHAUST FOUNDATIONS AND SUPPORTS

849-C330-09 LIFTING AND MECHANICAL HANDLING PROVISIONS

849-C330-10 LIFTING PROVISIONS CALCULATIONS

849-C330-XX VESSEL XXX SYSTEM FOUNDATIONS

849-C330-XX … FOUNDATIONS AND SUPPORTS

849-C330-XX FEA REPORT XXX FOUNDATION

STANDARDS

ABS Guide for Certification of Lifting Appliances.

API Specification 2C – Offshore Pedestal-mounted Cranes

C601 GENERAL REQUIREMENTS FOR PIPING SYSTEMS & MACHINERY

All machinery and piping systems shall be in accordance with the regulatory bodies referenced in Contract Paragraphs C003 and C004, and shall also comply with additional regulatory bodies and standards where specified. Specific requirements concerning the dredge systems are included in the C500-series Contract Paragraphs. References made to specific sections of codes, rules and standards in these specifications are intended to emphasize specific salient items.

REQUIREMENTS

All equipment shall be suitable for sea-going marine duty service. Piping, fittings and valves shall be provided and installed in accordance with the regulatory bodies, ASTM F708-92, ASTM F722-18 and ASTM F1155-10. All pipelines shall have a minimum wall thickness according to the requirements of the ABS and USCG.

Unless otherwise specified, all pumps shall be rated for 122-degrees F, provided with mechanical seals, and shall be direct coupled to the drive. V-belt drives are not acceptable. Flex joints shall be provided at suction and discharge connections of each fixed and hard-piped pump. All pumps connected to an electric motor of 5 HP and greater shall be fitted with resilient mounts. Means for lifting (for maintenance or replacement) to be provided to pumps and electric motors with parts weighing more than 55 lb.

All centrifugal pumps shall be long couple, horizontal type and, as much as possible, horizontal split case type. The required NPSH for the selected pumps shall be checked against the available NPSH for each service and reported in the calculations as requested in the specific system Contract Paragraphs.

Machinery guards shall be provided over all rotating and hazardous machinery. The guarding shall be consistent with that required by the U.S. Army Corps of Engineers, EM 385-1-1 “Safety and Health Requirements Manual.”

Manufacturer’s recommendations, concerning fabrication and installation of equipment, shall be followed in addition to these specifications. The Contractor shall provide sufficient accessibility for and space around equipment and piping for monitoring, maintenance, removal and reassembly in accordance with ASTM F1166-07 and the manufacturer’s specified maintenance envelopes.

SPECIFIC REQUIREMENTS

Pressure & Temperature Gauges All pressure gauges shall give readings in psig and all temperature gauges shall give readings in degrees Fahrenheit. The gauges shall be selected so the operating point is in the middle of the gauge range. All gauges shall be fitted with gauge isolation valves.

Pressure gauges shall be provided on the discharge of all pumps, and pressure/ vacuum gauges shall be provided on the suction side on all positive displacement pumps and the bilge pumps.

Temperature gauges shall be provided on all piping that transfers a medium in excess of ambient temperature and as identified in other Paragraphs of this Specification.

Piping – General Requirements The use of the designation “line” in this specification is defined as all pipe, fittings, and valves in a piping system run between the points indicated.

All piping shall be sized and arranged to obtain optimum operating conditions for the equipment and intended service. Velocities in pipelines in general shall be in accordance with the requirements indicated by the ABS Rules. Items of piping not covered in these specifications but required for proper installation and operation shall be furnished and installed the same as if specified.

System design shall route all piping as directly as practicable (avoiding pockets as far as possible); shall not interfere with machinery access or handling gear; and shall be sufficiently flexible and supported to account for thermal expansion, shock, vibration and the working of the vessel. Piping subject to mechanical damage shall be adequately protected. Where pipes penetrate structure reinforcement of the opening may be required, for details see Contract Paragraph C300. Wherever practicable, piping shall be run below the grating or sole level. No piping runs shall be made through access openings or across.

A sufficient number of take-down joints shall be installed in all pipe lines (for applicable systems as identified in Part 3 of this Contract Paragraph) to permit dismantling of the lines and equipment, and rigging that equipment out of the space for repair or replacement. The use of treaded unions shall be avoided as much as possible. Valves shall be installed in sufficient quantity to isolate any piece of equipment in the systems. All flange diameters and drillings shall be in accordance with ASME and ANSI standards.

Sufficient drains shall be provided to permit draining of all lines within the vessel in an even trim condition. The drains shall be provided at low spots (and pockets if applicable) in the piping, located so that they shall be readily accessible. Deaeration points to be provided on spots in systems where air can get trapped (for instance by filling of the medium).

Pipes passing through decks, watertight or oil tight bulkheads, shall have penetrations made which maintain the integrity of the bulkhead or deck and meet the applicable requirements of the regulatory bodies. Where pipes pass through watertight bulkheads or decks, the penetrations shall be watertight. Where pipes penetrate bulkheads, decks or tank-tops which are required to be fire tight or smoke tight, the penetrations are to be made by approved methods which will maintain the same degree of fire tight or smoke tight integrity.

Heat sensitive materials shall not be used in piping systems that penetrate watertight subdivisions where deterioration of such systems would, in the event of a fire, impair the watertight integrity of such bulkheads. Copper tubing that penetrates watertight bulkheads and decks shall use a suitable stuffing tube. Spool pieces with flanges shall be provided for all galvanized pipe penetrations to prevent the destruction of galvanizing due to welding.

All piping exposed in unheated spaces or to the weather and carrying fluids that can freeze shall be electrically heat traced, except that the fire main piping may be designed to be a dry system when not pressurized. Freeze protection shall be provided by installing drain plugs at all low points in all piping systems carrying fluids that can freeze.

Piping – Specific Requirements All piping shall be Sch 40, ASTM A-53, Type S or E except where otherwise indicated or required by ABS and/or USCG.

Piping shall be sized and arranged to obtain optimum operating conditions for the equipment and intended service. Items of piping not covered in these specifications but required for proper installation and operation shall be furnished and installed the same as if specified.

All piping between the side shell and the first inboard valve shall have a minimum wall thickness as stated by the regulatory bodies. All tank penetrations shall be through Sch 80 welded sleeve unless specified elsewhere.

No cast iron valves or wafer type valves shall be used at shell connections i.e. as the first inboard valve.

All steering system hydraulic lines and fuel oil lines shall be welded or have flanged connections (flange type to be accepted by the ABS Rules). Threaded connections on these systems are prohibited. Spray shields are to be fitted around flanged joints located near or above machinery air intakes, high temperature units or other sources of ignition.

When three or more valves are located together for the same service, they shall be combined in a manifold. Manifold plans, including the general system layout/ schematic, and manifold/ valve alignment instructions shall be provided at each manifold. Refer to the specific system Contract Paragraphs contained in this Contract for further details.

Manually operated valves shall be readily operable by one person, directly or through mechanical advantage type operators.

All overboard discharge valves shall have “lock-out” ability.

Remotely operated valves shall also be operable locally. All valves must be outside stem and yoke (OS&Y) and rising stem type or fitted with open/ close indicators. They shall be clockwise closing.

Check valves shall be of a type best suited for the service condition, especially the flow velocity to ensure that the valve will fully open. A check valve shall be installed where a reversal of flow is possible and would be detrimental to the proper functioning of the system, or might be injurious to equipment.

Gate valves are intended to be fully open or fully closed and shall not be used for throttling the flow, except for gate valves installed in the dredge pipe system, see Contract Paragraph C525.

Piping valve body envelopes shall be shown in all applicable (C500 and C600 level) drawings required in Contract Paragraph H12 for valves on piping greater than or equal to six (6) inches in nominal diameter.

All lines leading to the overboard discharges shall be angled downward sloping toward the water line, the pipe part connected to the hull to have a sloped angle of 60-70-degrees or better.

At the written request of the Contractor, the Government will consider the use of grooved mechanical pipe joining systems and valves for the potable water system, drainage system, raw water system, bilge and ballast systems, fire main system and cooling systems. The system must be ABS and USCG approved and specific system drawings updated to reflect the pipe joining system components, and resubmitted to ABS for review and approval. The COR has final approval authority on the use and implementation of grooved mechanical pipe joining systems.

When grooved mechanical pipe couplings are used on roll grooved, the grooving tool shall be of the same manufacturer as the pipe couplings, and a spare grooving tool provided with the vessel.

At the written request of the Contractor, the Government will consider the use of mechanical press pipe joining systems for the potable water system. The system must be ABS approved and specific system drawings updated to reflect the pipe joining system components, and resubmitted to ABS for review and approval. The COR has final approval authority on the use and implementation of mechanical press pipe joining systems. When mechanical press pipe couplings are used, the press tool shall be of the same manufacturer, and a spare press tool with the appropriate size clamps provided with the vessel.

Pipe Routing Instructions Piping shall not be run over or in the vicinity of switchboards, distribution panels, or other electrical equipment unless unavoidable, in which case flanged joints, valves, etc. shall not be installed in the vicinity. If unavoidable, all fittings in the vicinity shall be welded in accordance with ASTM F722-18 and drip trays or shields shall be provided over the equipment.

Piping conveying flammable materials shall not be routed adjacent to or over hot surfaces unless unavoidable, in which case adequate shields shall be provided.

Pipe Hangers Rigid hangers shall be designed and located in accordance with ASTM Practices for the Design and Installation of Rigid Pipe Hangers, F708-92. The hangers shall safely support the weight of the piping, its operating or test fluid (whichever is heavier), and its insulation and lagging (where installed).

The number of supports installed, the type selected and their location shall prevent excessive vibration of piping under all system operating conditions, but they shall not constrain the piping to such an extent as to cause excessive transfer of load from support to piping or from support to support.