20Q0298_Attachment 2_PWS.pdf

Performance Work Statement Specification for a Modular Metal Building

JML Doc #: 0174V006 (22 Sept 2020)

1. SCOPE

1.1. This specification provides the minimum requirements for Government purchase of one pre-engineered, self-framing, relocatable metal building.

2. BID SUBMITTALS

2.1. Provide submittals for modular panels, panel insulation, metal framing, panel fasteners, door hardware, and doors.

2.2. Metal panel layout drawings: show layouts of metal panels, including methods of support. Include details of edge conditions, joints, corners, and flashing. Distinguish between factory and field assembled work.

3. REQUIREMENTS

3.1. DESIGN CRITERIA

3.1.1. No later than 30 days after receipt of award: provide a complete, integrated set of mutually dependent components and assemblies that form a metal building system capable of withstanding structural and other loads, thermally induced movement, and exposure to weather without failure or infiltration of water into building interior. Provide metal building system of size, roof slopes, and spans indicated. Portsmouth to review and approve completed design drawing/diagrams of enclosure prior to start of fabrication.

3.1.2. The enclosure shall be shipped to Sub Base New London, located in New London, Connecticut. All shipping charges shall be the responsibility of the enclosure manufacturer.

3.1.3. The vendor shall provide modular panels in accordance with this specification in sufficient quantities to erect one insulated metal building with dimensions specified by Attachment #1. Panels shall be provided with storage racks that have fork lift pockets.

3.1.4. The assembled enclosure shall be designed to be sufficiently structurally rigid to withstand a wind load speed of 140 mph (3 second gust), roof load of 50 psf (ground snow load) when calculated in a category B seismic design and class D site soil classification in accordance with the International Building Code. Risk category for this structure is II.

3.1.5. The building construction system shall consist of nominal 3 foot wide, insulated modular panels, base plate channels, corner angles, roof truss members, structural bracing, gable panels, flashings and all hardware required to erect a weather tight building per this specification. All materials furnished under this specification shall be new and shall not have been pre-used.

3.1.6. The building shall be provided with tie-down plates on the exterior of each corner and along the walls as required to secure the building using wire rope. The plates shall be located and oriented as needed to withstand the forces determined by the above analysis. There shall be no tie-downs on the interior of the building.

3.1.7. The modular building shall be provided with a base plate channel for attachment of the wall panels and for maintaining the shape of the bottom of the enclosure. The channel shall be sized to withstand the environmental loads of this specification when the building is secured to the base frame.

3.2. MODULAR PANELS

3.2.1. The modular wall and roof panels shall have structural frameworks of ordinary strength steel meeting ASTM A6 or ASTM A36, as applicable, sized to meet the design criteria of this specification. The panels shall be sheathed on the exterior with minimum of 26 gauge, ribbed sheet metal sheeting with an overlap along one edge for weather tightness. Any weather stripping needed to make the building weather tight shall be provided. The exterior sheeting shall have a galvanized coating meeting G90 of ASTM 653/A or AZ55 per ASTM A 792.

3.2.2. The ordinary strength steel portions of the modular panels and base plate shall be factory coated with a primer and one finish coat, rated designed for a marine environment. The paints used shall not contain hazardous constituents in the cured form. The final coat shall provide a smooth and uniform finish such as that produced by spray or powder coat application.

3.2.3. The wall and roof panel frameworks shall be provided with rigid insulation board between the structural framing members and the exterior sheeting. The insulation shall be closed cell foam a minimum of 2” thick, with a minimum R value of 13. Insulation used shall not contain hazardous constituents. The insulation shall have a maximum flame-spread and smoke-developed rating of 25 and 425. The insulation shall be covered on the interior with a 29 gauge liner of galvalume coated steel.

3.2.4. The modular panels shall be designed for rapid field erection

3.2.5. The vendor shall provide a sufficient quantity of appropriately sized hex head fasteners (nuts, bolts and washers) for securing panels together.

3.2.6. A removable roof section shall be designed as shown in Attachment #1. The roof shall be designed such that it can be disconnected and rigged off the building.

3.3. PICKING PLATES

3.3.1. The removable roof section shall be provided with four picking plates capable of lifting the removable roof section without the use of a spreader beam. Angled picking plates to prevent the use of a spreader are acceptable and preferred. The picking plates shall be designed and located to accept standard rigging hardware or handling equipment (ASME B30.26 equipment) such as shackles, and slings. The picking plates shall be designed such that any two diagonally opposed will carry the entire weight of the removable roof section plus 50% for unexpected growth in the weight. The resulting value shall be further increased to reflect the loads induced by the angle the slings make to the plane the picking plates lie on. This calculated value is the Working Load Limit (WLL) for the picking plates. The picking plates shall be oriented so that the slings shall not pull out of the plane of the individual picking plates by more than 5 degrees. Picking plates must be able to withstand a 180° loading in the plane of the eye, at minimum.

3.3.2. The allowable stress for the pick plates shall meet the requirement of ASME BTH-1 for a nominal design factor of 10 or greater based on material tensile yield strength.

3.3.3. The picking plates shall be welded to the removable roof structural member by the manufacturer. Detailed drawings of installation location and welding requirements shall be included with professional engineers stamp.

3.3.3.1. All picking plate welds shall be free of cracks, crevices, craters, and divots caused by start/stopping of welds. Welds shall be continuous and wrapped at corners in order to prevent the entry of moisture into any interior un-bonded portion of the joint that may exist. Grooming of welds and material is acceptable to ensure MT acceptance criteria is met, so long as design weld size is not affected. The design of the pick plate welds shall meet the intent of AWS D1.1

3.3.4. The picking plates shall be located on the removable roof section so that the removable roof section can be lifted in a level fashion. The removable roof section’s base of support must not form an angle greater than 5 degrees from horizontal when lifted. It must be possible to lift the removable roof section by crane using no more than four and no less than two integral lifting attachments (picking plates).

3.3.5. The structure supporting the pick plates shall be designed to sustain the various lateral loads imparted by the arrangement of the picking plates and the induced sling loads.

3.4. DOORS

3.4.1. The building shall be provided with four factory fabricated 1-3/4” thick pre-hung doors as shown in Attachment #1. The doors shall swing as shown in Attachment #1. The doors shall have a minimum clear opening of 36 inches wide by 80 inches tall with a minimum R-value of 2 and have a NFPA 252 fire rating of 1-1/2 hrs. The doors shall be supported by a minimum 16 gauge cold rolled steel framework integral with the panel framework. These door panels shall be interchangeable with the other panels of this specification. Bulb-type weather-stripping shall be provided on the top and sides of the doors to minimize air infiltration. Foam type weather-stripping is not acceptable. The bottom of the doors shall also be provided with door sweeps. The doors shall contain no windows and be painted with factory applied manufactures standard primer and paint finish complying with SDI A250.3.

3.4.2. All personnel doors shall be equipped with commercial, stainless steel, “freezer door” style handles with an interior crash/release knob/handle/bar/latch for fast exit during an emergency. The exterior handle shall have provisions to be locked with a padlock. Each door shall include 3 full-mortise, stainless steel hinges, stainless steel strike plate, and removable hinge pins.

3.5. SERVICE SLEEVES

3.5.1. Service sleeves shall be located as detailed in Attachment #1. Expandable plugs shall be provided to install in the service sleeves when not in use.

3.6. TESTING

3.6.1. The manufacturer will be required to subject the pick plates to a load test for 10 minutes without permanent deformation or apparent damage. The load test shall be 150 % (-0%/+5%) of the WLL calculated in paragraph

3.3.1. Acceptance criteria shall be, no bending, cracking, or permanent deformation of the pick plates or associated structure Manufacturer will provide written load test certification at the time of delivery or prior to installation of pick plates.

3.6.2. The manufacturer will be required to provide calculations stamped by a professional engineer to verify the pick plates will meet or exceed the load test conditions and design criteria specified above. The certified calculations will be provided for review prior to shipment and delivery.

3.6.3. The manufacturer will perform a magnetic particle test (MT) on all accessible surfaces of the pick plate material and accessible associated welds per NAVSEA T9074-AS-GIB-010/271 using the acceptance criteria of MIL-STD-2035A, Class 3 for welds and wrought material for base metal. This magnetic particle inspection is the “Weld and Base Metal Post-Load Test MT.” A visual (5X) minimum inspection, shall be performed in cases where magnetic particle inspections are impractical.

3.6.3.1. Upon completion of MT, welds and surrounding area shall be painted to match surroundings.

3.6.3.2. The manufacturer shall provide written documentation to Portsmouth Naval Shipyard that the magnetic particle test (MT) inspections and load test(s) have been satisfactorily performed. Ensure documentation clearly specifies performance of “POST” load MTs, method used (NAVSEA T9074-AS-GIB-010/271 required), acceptance criteria used (MIL-STD-2035 required), and items (pick plate material and welds) that were inspected. This documentation shall be provided for review by Portsmouth Naval Shipyard prior to shipment and delivery of the building.

3.7. MARKING REQUIREMENTS

3.7.1. All markings shall be visible when the facility is in its assembled condition.

3.7.2. Permanently identify (by stamping) each of the picking plates. Number as 1-1, 1-2, 1-3 etc. By uniquely identifying each picking plate all required documentation will be matched with the right unit.

3.7.3. Each picking plate shall be permanently identified with its Certified Working Load Limit (WLL) as calculated in 3.3.1, [e.g., WLL=10,000 LB] by stamping, etching or by placing on a permanently attached label plate.

3.7.4. Each picking plate after receiving a load test shall also be permanently marked with the test date (i.e., by stamping, etching or by placing on a permanently attached label plate). Each picking plate will also be marked as suggested with the certification expiration (test due) date. In this case it shall be marked with “NA-SF10” due to design criteria.

3.7.5. The lifting plan with diagram shall be displayed on an 8in x 10in minimum sized corrosion resistant placard attached to the unit. Placard will also include the total weight (empty and full, if applicable) in 2” high letters with a contrasting color from the Unit (yellow unacceptable). Included on this placard shall be marked, or similar, “PICKING PLATES ARE FOR LIFTING REMOVEABLE ROOF SECTION ONLY. ENSURE ALL

LATCHES OR FASTENERS FOR HOLDING ROOF SECTION TO BUILDING HAVE BEEN

DISCONNECTED OR REMOVED PRIOR TO ATTACHING RIGGING. “

3.8. DOCUMENTATION

3.8.1. Detailed installation and user manuals containing complete instructions for field handling, erection, and dismantling of the metal buildings shall be provided with panel shipments. These instructions shall provide direction for securing the building down using the wire rope tie-down plates including the required location and weight of blocking and the capacity of the wire rope.

3.8.2. Provide structural stamped drawings and calculations.

3.8.3. Documentation, including MSDS must be included for all paints and insulation materials used. Lead based or chromium based paints are prohibited.

3.8.4. The weight of the complete building (± 5%) shall be provided to the Government prior to shipment of the building.

3.8.5. Detailed drawings of installation location and welding requirements shall be included with professional engineers stamp. (See 3.3.3)

3.8.6. The manufacturer will be required to provide calculations stamped by a professional engineer to verify the pick plates will meet or exceed the load test conditions and design criteria specified above. The certified calculations will be provided to Portsmouth Naval Shipyard for review prior to shipment and delivery. (See 3.6.2)

3.8.7. Manufacturer will provide written load test certification to Portsmouth Naval Shipyard for review prior to shipment and delivery or prior to installation of pick plates. (See 3.6.1)

3.8.8. The manufacturer shall provide written documentation to Portsmouth Naval Shipyard that the magnetic particle test (MT) inspections and load test(s) have been satisfactorily performed. Ensure documentation clearly specifies performance of “POST” load MTs, method used (NAVSEA T9074-AS-GIB-010/271 required), acceptance criteria used (MIL-STD-2035 required), and items (pick plate material and welds) that were inspected. (See 3.6.3)

3.8.9. A lifting plan that includes a diagram for lifting the Unit shall be provided by the Designer/Contractor/manufacturer and must be approved by PNS prior to fabrication of the unit. This plan shall include the Unit’s weight (empty weight and full weight, if applicable), center of gravity location, picking plate details and the locations of each picking plate. The plan shall 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 picking plates (if applicable), etc.

3.9. ASSEMBLY

3.9.1. Assembly pricing shall be provided with two options:

3.9.1.1. Option 1: Pricing for delivery and off load only to Sub Base New London, located in New London Connecticut. Field assembly shall be the responsibility of Portsmouth Naval Shipyard.

3.9.1.2. Option 2: Pricing for delivery and off load only to Sub Base New London, located in New London Connecticut. Field assembly shall be performed by the manufacturer or a contractor designated by the manufacturer. Access to a government facility is required as well as adherence to all safety requirements.

3.10. INSPECTIONS – PNS will be afforded the opportunity to inspect the facility at vendor facility prior to shipment to validate acceptability.