20Q0250_Attachment_2_PWS.pdf

Revision: D Date: 17 June 2020

Performance Work Statement for a Relocatable Metal Enclosure

1. SCOPE

1.1. This specification provides the minimum requirements for Government purchase of one pre-engineered, relocatable, metal enclosure. The metal enclosure can be either modular, or a modified shipping container. Modification will not affect the structural integrity of the container.

2. BID SUBMITTALS

2.1. Provide submittals for assembled metal enclosure including shipment to Portsmouth Naval Shipyard

2.2. Building layout drawings: show layouts of metal framing and paneling, including methods of support.

Distinguish between factory and field assembled work.

2.3. Within 30 working days after contract award, the successful bidder will submit a complete set of drawings (including all structural, mechanical (showing all piping), and electrical (showing all power and automatic control circuits)) and complete list of materials with material specifications to

Portsmouth Naval Shipyard for review and approval.

3. REQUIREMENTS

3.1. DESIGN CRITERIA

3.1.1. Provide a completely assembled metal enclosure capable of withstanding structural and other loads, thermally induced movement, and exposure to weather without failure or infiltration of water into enclosure interior.

3.1.2. The enclosure will be shipped to Portsmouth Naval Shipyard in Kittery, ME fully assembled.

3.1.3. The enclosure will have an exterior footprint of 8 feet wide by roughly 20 feet long. 19 feet -

10-1/2 inches to 20 feet in length is acceptable The interior clearance will be at least 7 feet - 1 inch wide by 19 feet long by 7 feet - 8 inches high. If the enclosure’s roof is modular, the roof will be a minimum of 1/4:12 single slope. See Figure 5 and Figure 6.

3.1.4. The assembled enclosure will be designed to Building Code 2006 IBC or better and be sufficiently structurally rigid to withstand a wind load speed of 115 mph (3 second gust), roof load of 50 psf (Ground Snow Load), and a snow load of 0 psf when calculated in a category C seismic design and class D site soil classification.

3.1.5. The enclosure will be designed to be lifted and relocated.

3.1.6. The enclosure will have tie down tabs that provide the ability to be attached to a foundation or secured to the ground for high wind and unusual seismic activity, in the event it is required.

The number of tie down tabs will be double the number of tie down tabs required to withstand environmental loads.

3.1.7. All materials furnished under this specification will be new and will not have been pre-used.

3.2. WALLS, FLOOR, AND ROOF

3.2.1. The exterior walls will be sheathed with a minimum of 24 gauge, ribbed sheet metal. The exterior sheeting will have a galvanized coating meeting G90 of ASTM 653/A, or painted with rust inhibitive primer and one finish coat, grey in color. The paints used will not contain hazardous constituents in the cured form. The final coat will provide a smooth and uniform finish such as that produced by spray or powder coat application.

3.2.2. The structural steel portions of the walls and base plate will have a galvanized coating meeting G90 of ASTM 653/A, or painted with rust-inhibitive primer and one finish coat, grey in color. The paints used will not contain hazardous constituents in the cured form. The final coat will provide a smooth and uniform finish such as that produced by spray or powder coat application.

3.2.3. The wall and roof frameworks will be provided with insulation between the structural framing members and the exterior sheeting. The insulation will be closed cell foam, spray foam or mineral wool to achieve a minimum R value of 10. Insulation used will not contain hazardous constituents. The insulation will have a maximum flame-spread of 25 and a maximum smoke-developed rating of 425. The insulation will be covered on the interior with a minimum of 28 gauge steel liner with a galvanized coating meeting G90 of ASTM 653/A, or painted with rust-inhibitive primer and one finish coat, grey in color. The paints used will not contain hazardous constituents in the cured form. The final coat will provide a smooth and uniform finish such as that produced by spray or powder coat application.

3.2.4. One 12 inch wide by 12 inch high framed exterior wall penetration will be provided in the location specified in Figure 5 and Figure 6.

3.2.4.1. The framed exterior wall penetration will have a rubber flap, which sits flush with the exterior siding when not in use.

3.2.5. Two 6 inch diameter pass-through wall penetrations will be provided on the wall separating the two rooms in the location specified in Figure 7.

3.2.6. Floor will be diamond plate and fully sealed. The floor will be rated to a minimum of 100 psf.

3.3. DOORS

3.3.1. The enclosure will be provided with two weather-tight, sliding doors located as shown in

Figure 5. The doors will have a minimum clear opening of 3 feet wide by 6 feet - 8 inches tall with a minimum R-value of 2. The doors will be supported by a minimum 16 gauge cold rolled steel framework integral with the wall framework. Weather-stripping will be installed on the top and sides of the doors to minimize air infiltration. Foam type weather-stripping is not acceptable. The doors will be painted with factory applied manufactures standard primer and paint finish complying with SDI A250.3.

3.3.2. All doors will be equipped with light commercial, stainless steel handle with latches to secure the doors shut.

3.3.3. Pry-resistant lock hasps will be installed on each door to prevent access inside the enclosure when secured.

3.4. ELECTRICAL

3.4.1. The electrical package will consist of a main distribution panel, lights, and receptacles per the

2017 National Electrical Code. Install a minimum of four light fixtures on the inside ceiling.

Light fixtures to be New-Star VIC4NL2401CRWUNWH-EL1-DM1 or equivalent. Equivalency will be at the sole discretion of Portsmouth Naval Shipyard. Light fixtures will be 4k color temperature LED dimmable fixtures with emergency backup units integral to each fixture for no loss of lighting during a power outage. Wire fixtures as two circuits with dimmer switches so that each side of the enclosure can have the lighting dimmed independently of the other.

Provide lighted exit signs with integral battery backup over each of the doors.

3.4.2. Include a 100 Amp, 2-pole main breaker distribution panel as the electrical service. The main panel will be flush-mount in the interior of the enclosure adjacent to the primary personnel entrance. The panel will use bolt-on style breakers. The panel will be fed from an exterior-mounted IEC-60309, 120/250v 60A male inlet. Hubbell 460B12W brand-name mandatory.

Inlet will be mounted at a downward angle or on an angled enclosure. Include all necessary circuit breakers, and include 20% installed spare circuit breakers. Refer to Figure 9 for an electrical single-line diagram. Circuit breakers shall be non-GFCI, non-AFCI type breakers.

3.4.3. Install receptacles flush-mounted with the interior sheathing at a minimum spacing per the

NEC. All receptacles will be NEMA 5-20, 20-amp rated, commercial duty. Include dedicated circuits for quad receptacle boxes in the following locations:

3.4.3.1. One circuit behind the open shelf system.

3.4.3.2. One circuit which feeds 4 quad receptacle boxes, one in each corner of the personnel entrance section of the enclosure.

3.4.3.3. Two circuits for receptacles above the desk space. Install receptacle boxes with 3 foot spacing in between each receptacle box, and alternate the circuits between boxes.

3.4.3.4. Two circuits for receptacles below the desk space. Install receptacle boxes with 3 foot spacing in between each receptacle box, and alternate the circuits between boxes.

3.4.4. Furnish two flush-mounted telephone wall plates with integral telephone hanging points, one on each side of the divider between enclosure rooms. Wire telephone jacks with Cat5e wiring and terminate to a terminal strip inside an exterior-mounted, NEMA 4x junction box. Label the junction box TELEPHONE and ensure there is enough room on the terminal strip for each telephone to have its own line.

3.5. HEATING AND COOLING

3.5.1. The enclosure will have a fresh air intake, 208 volt, single-phase, A/C unit, capable of heating and cooling modes. The A/C unit must be able to accommodate an external temperature range of -30 degrees Fahrenheit to 120 degrees Fahrenheit and maintain the interior enclosure temperature at 72 degrees Fahrenheit with an expected occupancy of 6 persons.

3.6. DOCUMENTATION

3.6.1. The weight of the complete enclosure (+ 5%, -0%) will be provided to the Portsmouth Naval

Shipyard prior to shipment of the enclosure.

3.6.2. All calculations required for the design of the lifting padeyes will be performed by a structural engineer and/or certified by a registered Professional Engineer. Provide detailed drawings of installation and welding requirements.

3.6.3. Documentation, including MSDS, must be included for all paints and insulation materials used.

3.6.4. A lifting plan that includes a diagram for lifting the enclosure will be provided by the

Designer/Contractor and must be approved by Portsmouth Naval Shipyard prior to fabrication of the enclosure. This plan will include the enclosure’s weight (empty weight and full weight, if applicable), center of gravity location, Integral Lifting Attachment details and the locations of each Integral Lifting Attachment. The plan will also include any basic lifting restrictions and any special allowances, including, but not limited to, minimum sling length, minimum sling capacity, or allowance for out-of-plane pulling on padeyes (if applicable), etc.

3.6.4.1. Lifting plans and Integral Lifting Attachment designs require written approval from

Portsmouth Naval Shipyard Lifting and Handling Department Technical Division

(C710) for any Enclosure which weighs 96,000 lbs. or greater.

3.6.5. An as-built drawing will be provided to the Portsmouth Naval Shipyard prior to shipment of the enclosure.

3.6.6. Operation manuals must be included with shipment of the enclosure for all items that are provided with one from factory (e.g., A/C unit).

3.7. LIFTING PADEYES

3.7.1. DEFINITIONS

3.7.1.1. Integral Lifting Attachment (ILA): A lifting point that is permanently attached to or part of the Enclosure being lifted such as a padeye, lifting eye, integrally mounted ring, threaded hole, or a hole in a structural element, etc.

3.7.1.2. Enclosure: The item or load being lifted to which ILAs are permanently mounted.

3.7.1.3. PNSY: Portsmouth Naval Shipyard

3.7.1.4. Contractor: The entity fabricating the Enclosure.

3.7.1.5. Designer: The Qualified Engineer or entity designing the Enclosure including the ILA installation to the Enclosure.

3.7.1.6. Base of Support: That portion of the Enclosure’s structure that contacts the ground and supports the Enclosure when the Enclosure is on the ground (i.e., footprint).

3.7.1.7. Qualified Engineer: An engineer who is competent in the practice of structural and/or mechanical engineering as a result of education and experience.

3.7.1.8. Working Load Limit (WLL): The maximum allowable load that can be applied to a designed structural component without infringing on its safety factors defined herein, aka: design capacity.

3.7.2. GENERAL

3.7.2.1. If the metal enclosure is a modified ISO shipping container, a certified statement will be required from the structural engineer attesting that the modification has not affected the structural integrity/capacity of the container.

3.7.2.1.1. The integral corner fittings of the container are sufficient, no additional

ILAs are required. The integral corner fittings do not require extra testing, certification, or marking.

3.7.2.1.2. The new center of gravity (CG) of the modified shipping container should remain close to the location of the original CG of the shipping container.

3.7.2.2. Any deviations to this specification that pertain to ILAs or other crane lifting and handling related functions must be approved in writing by PNSY, with concurrence from the PNSY Lifting and Handling Department Technical Division (Code 710).

3.7.2.3. Threaded holes intended to be used as ILAs will not be lubricated and will be protected by removable threaded plugs or similar when not in use.

3.7.2.4. The padeye is the preferred ILA and it should be used when possible, provided it can be incorporated into the design of the Enclosure in a practical way. Examples of padeyes and the preferred rigging configuration using padeyes are provided in

Figure 1 and Figure 2.

3.7.2.5. Material used for the purposes of manufacturing an ILA will be steel or aluminum.

Figure 1. Typical padeyes.

Figure 2. Standard (preferred) lifting configuration.

3.7.3. MARKING

3.7.3.1. The total weight (empty and full, if applicable) of the Enclosure will be permanently marked on each side of the Enclosure with 2-inch high lettering (or larger) with a contrasting color from the Enclosure (yellow unacceptable).

3.7.3.2. Each ILA will be permanently identified with its WLL, [e.g., WLL=10,000 LB] by stamping, etching or by placing on a permanently attached label plate.

3.7.3.3. Any ILA receiving a load test will also be permanently marked with the test date (i.e., by stamping, etching or by placing on a permanently attached label plate).

3.7.3.4. The lifting plan with diagram will be displayed on an 8 inch by 10 inch minimum sized placard attached to the Enclosure.

3.7.4. PLACEMENT

3.7.4.1. ILAs will not be located below the Enclosure’s center of gravity or in any condition which could result in an unstable lift.

3.7.4.2. It must be possible to lift the Enclosure by crane using no more than 4 and no less than 2 ILAs.

3.7.4.3. The ILAs will be located on the Enclosure so that the Enclosure can be lifted in a level fashion. The Enclosure’s Base of Support must not form an angle greater than

5 degrees from horizontal when lifted. See Figure 3.

Figure 3. Maximum allowable tilt in lift.

3.7.4.4. The ILAs must be situated/located on the Enclosure so that the item can be lifted using standard rigging equipment such as shackles, swivel hoist rings and slings.

Lifting arrangements which require strongbacks, spreader beams, non–standard

(metric) threads, eyebolts, or other unique lifting gear in order to be lifted by crane must be approved in writing per paragraph 3.7.2.2.

3.7.4.5. ILAs must be designed to allow for the proper connection of standard rigging gear as provided by ASME B30.26. ILAs will not be solely designed for direct connection into a hook without written approval per paragraph 3.7.2.2.

3.7.4.6. ILAs must be oriented so that the worst case forces that result when the Enclosure is lifted do not cause stresses that exceed the allowable stresses provided herein.

Specifically, if padeyes are used as ILAs they should be oriented on the Enclosure so that the resulting direction of pull exerted by the rigging equipment lies within 5 degrees (10 degrees included angle) of the plane formed by the padeye plate. If the designed or intended use of padeye requires the applied load to be directed out of plane with the padeye plate (greater than 5 degrees), the padeye must be designed so that such loading (under worst case conditions) does not result in stresses which exceed the allowable stresses described herein (see ILA DESIGN section) and marking/documentation provided to indicate that out of plane loading is acceptable.

3.7.5. ILA DESIGN

3.7.5.1. The Designer of the ILAs will be a Qualified Engineer.

3.7.5.2. A Qualified Engineer other than the Designer will review all calculations.

3.7.5.3. Design lifting attachments to accept standard rigging hardware or handling equipment (ASME B30.26 equipment). Attachment points on components that are part of a larger system (e.g., multiple components which form an enclosure) will be sized such that one set of standard rigging equipment can be used to lift all components of the system.

3.7.5.4. The WLL of each ILA will be sized based on the worst case loading that it may be required to resist, based on the location of a ILA relative to the Enclosure’s center of gravity and the other ILAs, on the maximum angle from vertical formed by the lifting slings, and on the ability for the connected rigging gear to equalize between structurally redundant connections (when 4 slings are used to lift the Enclosure). In arrangements where 4 ILAs are used, each ILA must be designed so that either pair of diagonally opposed ILAs are capable of supporting the entire load of the

Enclosure (with the force magnifying effects of sling angles being considered) without infringing on the safety factors stipulated herein. See Figure 4.

Figure 4. Worst case loading when four ILAs are used.

3.7.5.5. The WLL of each ILA will be sized to provide a margin between the WLL and the actual (expected) loading. See Table 1 for minimum margin requirements. Additional margins should be considered for integral attachments subjected to situations with the potential for increased loading (e.g., binding or hang-ups due to seals of tight tolerances, additional weight in buildings/enclosures or fluid filled voids, etc.).

Table 1. Minimum required margins between WLL and actual load weight.

3.7.5.6. ILAs will be designed using an allowable stress which is the lower of the two values resulting from a safety factor of 3.0 with respect to yield strength (FY) or 5.0 with respect to ultimate strength of the material (FU). A factor of 0.6 will be applied to any allowable shear stress. For example, the allowable stress for double shear plane tear-out of a padeye hole would be either (0.6)(FY)/3.0 or (0.6)(FU)/5.0, whichever is more restrictive.

3.7.5.7. Any welds will be designed per American Welding Society (AWS) Specification D1.1 with the following exceptions: Welds will be designed with a safety factor of 5.0 with respect to the ultimate strength of the weld metal or base metal as applicable. A factor of 0.6 will be applied to any allowable shear stress. For example, the allowable stress of a fillet weld will be (0.6)(Fu)/5.0, since fillet welds are generally assumed to fail in shear, where Fu is the ultimate strength of the weld filler material or the base metal as applicable. The allowable stresses provided here apply only to the failure modes, which directly relate to the ILA and the connecting weld joint. These allowable stresses do not apply to any adjacent surrounding structure; however, such surrounding structure may be required to resist a one-time applied load equal to

210 percent of the WLL of the ILA in the cases where 200 percent load tests are required as provided herein.

3.7.5.8. Any ILAs (excluding threaded or through-holes installed directly into a structural element of the Enclosure) are to be connected to the Enclosure using a welded joint which meets the requirements of paragraph 3.7.5.7. Welded joints connecting ILAs to the Enclosure structure will be designed using a continuous weld around the exterior of the joint (as a minimum) in order to prevent the entry of moisture into any interior un-bonded portion of the joint that may exist. Bolted joints that directly connect an ILA to the Enclosure are not permitted. This does not apply to bolted joints placed elsewhere in the structure of the Enclosure that do not serve as a structural connection directly between the ILA and the Enclosure.

Total Item Weight (lb.) WLL of Integral Attachment1

Less than 1,000 +200 lb.2 OR 200% (whichever is greater)

1,000 - 10,000 150%2

10,001 - 100,000 125%3

Greater than 100,000 115%

Notes:

1. Percentages shown are of expected load exerted on the integral attachment.

2. Total Item Weight + 200 lb.

3. Percentage may be reduced to 115 percent IF the weight of the item is known (not estimated) AND the potential for binding or added weight does not exist.

3.7.5.9. Threaded holes used as ILAs may only be installed on Enclosures which are primarily intended for in-door use. Where threaded holes are used as the ILA (e.g., for use with swivel hoist rings or eyebolts), the length of threaded holes must be at least 1.5 times the nominal thread diameter for steel, or 2.0 times the nominal thread diameter for aluminum.

3.7.5.10. Only standard imperial (non-metric) UNC - Class 2B threads may be used as threaded holes intended for use as ILAs.

3.7.5.11. Threaded holes intended for use as an ILA must be located to allow for 360-degree rotation and 180-degree pivot of a standard swivel hoist ring bail.

3.7.5.12. Threaded holes intended for use as an ILA must be located on the structural element so that the seating surface of a mounted swivel hoist ring does not overhang the edge of the structural element and the mating face of the structural element is flat to match that of a standard swivel hoist ring.

3.7.5.13. All surfaces of an ILA which could be subjected to moisture, corrosion, or wear due to movement must be accessible for inspection without disassembly.

3.7.5.14. Any ILA attached via a weldment with a capacity greater than 6,000 lbs. must receive a one-time 200 percent load test, which will be administered by the Contractor prior to delivery of the Enclosure.

3.7.5.15. The applied test load will be 200 percent of the design capacity (WLL) with a tolerance of +5%/-0% of the test load. In other words, the applied test load will be a minimum of 200 percent and a maximum of 210 percent of the design capacity

(WLL) of the ILA. The test load will be maintained for a period no less than 2 minutes.

3.7.5.16. The test load can be applied to each ILA individually or to multiple ILAs at once provided it can be shown through basic mechanics that each tested ILA received the proper test load value. Applied test load should mimic the as-used/as designed configuration to the maximum extent practicable, with alternate loading configurations approved by the Designer.

3.7.5.17. Written documentation will be provided by the Contractor, which documents the completion of this test for each ILA listing the ILAs tested, actual applied load, test date, 2-minute test duration and signature of person performing the test.

3.8. INTERIOR LAYOUT AND FURNISHINGS

3.8.1. The interior space will be divided into two rooms with dimension provided in Figure 7 and

Figure 8. The rooms will be separated with a minimum clear opening of 3 feet wide by 6 feet -

8 inches tall. A removable metal chain will be installed at a height of 3 feet from the floor, with a maximum deflection of 6 inches.

3.8.2. Desk space will be provided with the dimensions provided in Figure 7 and Figure 8. Desks will support 100 psf. The working surface will be fabricated with a minimum of 22 gauge corrosion resistant sheet metal, and have a smooth finish. Desks will be secured so that they do not move in transport. Include 4 inch wide by 2 inch deep cable management slots at the back of the desk, spaced 2 feet on-center, around the entire perimeter of the desk.

3.8.2.1. The center section of the desk space will have a fold down feature, integrated at the dotted line displayed in Figure 8.

3.8.3. Install open wire basket cable management system underneath the perimeter of the desk section, extending to the open shelving system, the path is specified with a green line in

Figure 8. Basket tray shall be approximately 6 inches by 6 inches.

3.8.4. Open face shelf system will be provided with the dimensions provided in Figure 7 and

Figure 8. Each shelf will support 180 psf. The surface will be fabricated with a minimum of 22 gauge corrosion resistant sheet metal, and have a smooth finish. The shelf system will be secured so that it does not move in transport.

3.8.5. Install flush-mounted 1 5/8 inch by 1-5/8 inch strut system on the walls above the desk section, in the location specified with a red line in Figure 8.

3.8.5.1. Install 3 parallel horizontal struts, equally spaced, such that the bottom row is 12 inches above the desk and the top row is 12 inches below the finished ceiling.

3.8.5.2. Strut shall be hung from structural studs welded to the exterior of the enclosure or otherwise made to be integral to the wall system so that they are load-bearing.

3.9. DELIVERY REQUIREMENTS

3.9.1. The enclosure will be delivered to Portsmouth Naval Shipyard and ready for use no later than the 3 MAY 2021.

Figure 5. Right view for relocatable metal enclosure. Man doors are located on the front wall, and left wall of the enclosure. Framed exterior wall penetration is located on the left wall of the enclosure, located below the interior desk space.

Figure 6. Front view for relocatable metal enclosure.

Figure 7. Section view A-A of relocatable metal enclosure.

Figure 8. Section view B-B, plan view, of relocatable metal enclosure.

CB-1

Lights

15A 20A 20A

CB-2 CB-3 CB-4

HVAC

20A

Exit Signs

SERVICE INLET

100A MAIN

Spare

20A20A

CB-5

BOND GROUND TO EXTERIOR STEEL

20A20A

CB-6

IEC 60309

460B12W

BEHIND SHELVING ENTRANCE AREA ABOVE DESK.

SPACING PER SPEC

ABOVE DESK.

SPACING PER SPEC

20A

CB-7

20A

CB-8

BELOW DESK.

SPACING PER SPEC

BELOW DESK.

SPACING PER SPEC4x BOXES

Spare

20A

ADDITIONAL

CIRCUITS AS

REQUIRED BY

CODE

Figure 9. Electrical single-line diagram