Purchase_Description__USN_EXWC_34-Ton_Step_Deck_Trailer_formated.docx

PURCHASE DESCRIPTION

34-TON STEP DECK TRAILER

Naval Facilities Engineering and Expeditionary Warfare Center (NAVFAC EXWC) Document Identifier: Purchase Description 34 Ton Step Deck Trailer

Revision: 9/22/2026

SECTION 1: INSTRUCTIONS AND NOTES TO OFFERORS

1.1 Exceptions to Specification

The Offeror shall explicitly and completely identify any and all exceptions taken to the requirements of this specification. Drawings, literature, and any other information submitted with an offer do not constitute a stated or implied exception unless specifically identified in writing as an exception and accepted and implemented by an amendment to the solicitation or modification to a contract. Any exception deemed acceptable by the Government shall only apply to the specific item or requirement cited and shall not extend to any other requirement.

1.2 "Or Equal" Evaluations An Offeror proposing items other than the brand name items identified herein, when an "or equal" is acceptable, shall furnish with their proposal all technical data, product descriptions, and specifications necessary to ensure a proper determination of equality (reference FAR 52.211-6, "Brand Name or Equal").

1.3 Proposal Submittal Requirements

The following items shall be provided with the proposal:

Letter of Exceptions: A detailed explanation, submitted in a separate letter, of any exceptions to the specification (including alternate equipment proposed) or an affirmative declaration of comprehensive understanding with zero exceptions taken.

Preliminary Engineering Drawings: Detailed drawings showing:

Layout views of the proposed trailer, including equipment locations and basic dimensions verifying compliance with all requirements herein.

Exterior front, rear, and side elevations with overall dimensions.

Estimated curb weight and Gross Vehicle Weight Rating (GVWR) / Gross Axle Weight Rating (GAWR).

Quality Assurance Documentation: Documented evidence of established quality assurance systems and manufacturing procedures.

Customer and Technical Support Plan: Detailed procedures for customer service, warranty processing, and technical support access via email, telephone, and web portal.

SECTION 2: SCOPE AND APPLICABLE DOCUMENTS

2.1 Scope and Background

NAVFAC EXWC requires replacement of an aging trailer fleet based on current operational and expeditionary support missions. This specification establishes requirements to address fleet capability gaps while complying with Military (MIL), American Welding Society (AWS), and Society of Automotive Engineers (SAE) standards for commercial and tactical trailers. Compliance ensures commonality across Department of Defense (DoD) components and civilian fleets, enabling joint operational readiness in austere and off-highway environments.

2.2 Applicable Documents

The following documents of the issue in effect on the date of solicitation form a part of this specification to the extent specified herein:

2.2.1 Federal Standards and Codes

Code of Federal Regulations (CFR):

49 CFR Part 393 – Federal Motor Carrier Safety Regulations (FMCSR) 49 CFR Part 571 – Federal Motor Vehicle Safety Standards (FMVSS) Note: DOT publications are available from the Superintendent of Documents, U.S. Government Publishing Office, Washington, D.C. 20402 or online at www.access.gpo.gov.

Department of Defense Standards:

MIL-STD-209K: Interface Standard for Lifting and Tie-Down Provisions MIL-STD-1366E: Interface Standard for Transportability Criteria MIL-STD-1791D (Notice 1): Designing for Internal Aerial Delivery in Fixed Wing Aircraft DODI 4540.07 (Change 3): Operation of the DoD Engineering for Transportability and Deployability Program

2.2.2 Society of Automotive Engineers (SAE) Standards

SAE J163: Low Tension Wiring and Cable Terminals and Splice Clips SAE J429: Mechanical and Material Requirements for Externally Threaded Fasteners SAE J551: Measurement of Electromagnetic Radiation from Motor Vehicles and Devices SAE J553: Circuit Breakers SAE J560: Primary and Auxiliary Seven-Conductor Electrical Connector for Truck-Trailer Jumper Cable SAE J561: Electrical Terminals – Eyelet and Spade Type SAE J575: Tests for Motor Vehicle Lighting Devices and Components SAE J576: Plastic Materials for Use in Optical Parts Such as Lenses and Reflectors SAE J578: Color Specification for Electric Signal Lighting Devices SAE J682: Front and Rear Wheel Splash and Stone Throw Protection SAE J1128: Low Tension Primary Cable SAE J1292: Automobile, Truck, Truck-Tractor, Trailer, and Motor Coach Wiring SAE AMS-STD-595A: Colors Used in Government Procurement Note: SAE publications may be obtained from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096.

2.2.3 International and NATO Standards

ISO 668: Series 1 Freight Containers – Classification, Dimensions and Ratings (www.iso.org) NATO STANAG 4009: Interface Geometry Between Tractors and Semi-Trailers (https://nso.nato.int)

2.2.4 Industry Standards and Recommendations

TMC RP 803: Pre-Service Trailer Inspection, Technology & Maintenance Council, American Trucking Associations (https://tmcconnect.trucking.org) ASME Section IX: Welding, Brazing, and Fusing Qualifications AWS Structural Welding Codes: D1.1 (Steel) and D1.6 (Stainless Steel) ASTM B117 / ASTM D1654: Standard Practice for Operating Salt Spray Apparatus and Evaluation of Painted Specimens ASTM D3170: Standard Test Method for Chipping Resistance of Coatings

2.3 Order of Precedence

In the event of a conflict between the text of this specification and the references cited above, the most stringent requirement, as determined by the Government, shall govern. Nothing in this document supersedes applicable mandatory Federal and State safety laws and regulations.

SECTION 3: TECHNICAL REQUIREMENTS

3.1 General Requirements

Material Quality: All materials shall be new, of commercial industrial grade, and free of defects that may impair functionality, safety, durability, or appearance. The Government reserves the right to determine the final suitability of all components and their layout.

Safety & Operation: All safety guards, protective devices, warning decals, and emergency manual/automatic shut-off controls shall be fully functional and permanently affixed.

3.2 Capacity and Dimensions

Payload Capacity:

Distributed Load: 70,000 lbs minimum evenly distributed across the lower deck.

Concentrated Load: 50,000 lbs minimum concentrated within any 10-foot linear span.

Overall Dimensions:

Overall Length: Not to exceed 51 feet (612 inches).

Overall Width: Not to exceed 8.5 feet (102 inches).

Loaded Travel Height: Not to exceed standard DOT clearance of 13 feet 6 inches when carrying designated ISO loads.

3.3 Configuration and Cargo Intermodal Capability

The trailer shall be designed to transport containerized freight, breakbulk cargo, palletized construction materials, and light construction machinery:

Container Compatibility:

Six (6) 6 ft 8 in TRICON containers secured as a single payload, each individually locked to the deck.

One (1) 20 ft ISO container secured as a single payload, individually locked.

Mixed combinations of TRICONs, 20 ft ISO containers, breakbulk cargo, and mobile construction assets (e.g., skid-steer loaders, portable generators, light towers, HMMWVs).

Deck Tie-Down Provisions: Integrated perimeter tie-down points located at a maximum of 5-foot intervals along both sides and two (2) provisions on the rear sill.

3.4 Frame, Decking, and Structural Components

Chassis Construction: High-strength steel main beam frame with integrated steel or aluminum decking support crossmembers. Fasteners securing decking shall not compromise frame crossmember flanges or structural integrity.

Deck Surface: Heavy-duty steel, composite decking (1.75-inch Rumber or approved equal), or an engineered combination impervious to fuels, oils, solvents, UV radiation, and mud. Crossmember spacing shall guarantee zero surface deflection under maximum rated load.

Upper Deck: Full-width upper deck with gooseneck transition.

Standard Kingpin Swing Radius: 84 inches minimum.

Optional Kingpin Swing Radius: 90.5 inches minimum (NATO STANAG 4009 compliant).

Headache Rack: Heavy-duty bolt-on front steel headboard/headache rack featuring:

Two (2) fork pockets (4 in H × 10 in W, 48 in center-to-center) at top for material handling.

Inverted, shielded work lights beneath top beam with a recessed weather-sealed switch on the driver side.

Engraved/etched stainless steel lighting data plate permanently riveted to the rack structure.

Lockable chain storage rack with positive retention to prevent swinging open when unlocked.

Detachable electrical disconnects with sufficient wiring slack to eliminate tension during rough-terrain articulation.

Landing Gear: Two-speed landing gear with driver-side crank handle.

Braced with heavy-duty fore-aft and lateral diagonal bracing to prevent collapse under full rated load.

Positioned to eliminate interference with tactical and commercial prime movers.

Crank handle shall be removable or positively stowed in a retaining clip during transit.

3.5 Running Gear, Axles, and Brakes

Suspension System: 25,000-lb nominal capacity air-ride suspension with manual and automatic air-dump valve (Raise/Hold/Lower) recessed into the rear trailer sill.

Capable of traversing and backing up a 15-degree ramp crest without chassis contact or suspension damage.

Configured so rear tires and suspension links cannot impact the main frame under full compression or articulation.

Axles and Hubs: Heavy-duty round axles rated to exceed Gross Axle Weight Ratings.

Automatic slack adjusters on all wheel positions.

Oil bath wheel hubs with clear sight-glass oil-level indicators.

Mechanical (analog) hub-odometer installed on the driver-side front axle hub (digital odometers prohibited).

Brake System: Commercial FMVSS-121 compliant Anti-Lock Braking System (ABS) with driver-side rear exterior ABS fault indicator lamp. Easily accessible manual drain petcocks for all air reservoirs.

3.6 Wheels and Tires

Wheels: Heavy-duty, hub-piloted, single-piece solid steel wheels for dual-wheel configurations (wide-base single "super single" tires are prohibited).

Finished in matte black or lusterless Olive Drab (OD) Green (Color #34094 per SAE AMS-STD-595A).

Tires: First-line commercial-highway steel-belted pneumatic radial tires rated for full design GVWR.

Retread or recapped tires are prohibited.

All tires shall be of the same brand, tread pattern, and manufacturer line ("Double Coin" or unapproved economy brands prohibited).

Tire manufacturing date shall not exceed one (1) year at time of unit delivery.

Valve stems shall be fully accessible with standard commercial tire service chucks.

Spare Wheel and Carrier: One (1) complete matching spare tire and steel wheel assembly mounted to the front headache rack. Mounting shall not interfere with tractor cab swing, air transport loading, or lifting operations. Full tire change tool kit (breaker bar, lug socket, and crank handle) included.

3.7 Electrical and Lighting Systems

System Operating Voltage: Dual-voltage 12V/24V DC hermetically sealed LED lighting package (6–28V operational range).

Connectors:

12-pin NATO intravehicular receptacle (24V tactical interface).

7-way SAE J560 round-pin receptacle (12V commercial interface).

Dedicated sealed ABS connector.

Wiring and Harnessing:

Fully modular, jacketed, multi-conductor cabling sealed against environmental intrusion.

Wiring runs supported along chassis with heavy-duty metal P-clamps and stainless steel hardware; plastic zip-ties are strictly prohibited.

Wiring pass-through points protected by heavy-duty rubber or nylon grommets.

Splicing and wire entry points fully potted or heat-shrink sealed.

Wire harnesses routed with adequate strain relief/slack and positioned at least 30 inches above grade to avoid snagging brush or debris.

3.8 Auxiliary Equipment and Accessories

Storage Toolboxes: Two (2) weatherproof, heavy-duty steel underbody toolboxes with lockable compression latches and reinforced continuous hinges. Latches shall secure doors closed even when unpadlocked (key-only lock mechanisms prohibited).

Cargo Securement System:

Continuous roadside steel winch track with a minimum of twelve (12) 4-inch heavy-duty sliding ratcheting winches complying with NAVFAC P-307.

Twelve (12) 4 in × 25 ft cargo straps with flat snap hooks (minimum Working Load Limit: 5,500 lbs each).

Full-length curbside steel rub rail with integrated stake pockets on 24-inch centers.

Outer and 4-way center deck chain keyholes sized for standard 3/8-inch and 1/2-inch grab hooks.

ISO Container Twist Locks: Deck-recessed, retractable/removable twist locks with positive secondary locking pins to prevent unintended rotation. Operational without requiring personnel to reach beneath the deck surface.

Pneumatic / Glad Hands: Glad hands equipped with dust seals, dummy stowage plugs, and stainless retention lanyards.

Miscellaneous Equipment:

Heavy-duty plain black rubber mud flaps (no commercial vendor logos).

Two (2) pairs of oversize flag holders (front and rear) including warning flags.

FMVSS DOT C-2 alternating red/white retroreflective contour tape along full perimeter.

SECTION 4: PRIME MOVER COMPATIBILITY AND PERFORMANCE

4.1 Operating Environment and Mobility

Terrain Capability: Capable of highway, secondary paved, gravel, unpaved crushed rock, cobblestone, and cross-country off-highway operation while fully loaded.

Climatic Envelope: Full operational performance in ambient temperatures ranging from -25°F to +130°F (-31.7°C to +54.4°C).

Ramp Negotiation: Capability to ascend/descend a 15-degree ramp crest without dragging rear frame, undercarriage, or landing gear.

Fifth Wheel Height Interface: Compatible with fifth wheel heights from 49 to 59 inches.

4.2 Government Tow Vehicle Salient Characteristics

The trailer shall interface seamlessly with the following Government-Owned Vehicles (GOVs):

4.2.1 Commercial Prime Mover: Mack Granite 6×4 (160K Series GR64BTX) Gross Vehicle Weight (GVW): 66,000 lbs | GCWR: 176,000 lbs Axle Ratings: Front: 22,000 lbs (limited to 20,000 lbs by tires) | Tandem Rear: 46,001 lbs Wheelbase: 204.5 in (front axle to tandem centerline) Fifth Wheel: Height: 53.5 in | Front Clearance: 66.5 in | Rear Swing: 75 in (slide travel: 6 in rear, 17.5 in fwd) Hydraulic Wet Kit: 2,500 psi @ 20 GPM, 3/4-in quick-disconnect coupler, 30-gallon reservoir

4.2.2 Tactical Prime Mover: Heavy Truck Tractor (HTT - Navistar Series) Gross Vehicle Weight (GVW): 130,000 lbs | GCWR: 166,000 lbs Axle Ratings: Front: 20,000 lbs | Tandem Rear: 84,000 lbs Wheelbase: 197.5 in (front to intermediate); 258 in (front to rear-most axle); 60 in dual spread Fifth Wheel: Height: 52–59 in (adjustable) | Front Clearance: 58 in | Rear Swing: 73 in (slide: 15.5 in rear, 30 in fwd) Hydraulic Wet Kit: 3,000 psi @ 57 GPM, 1-1/4-in quick-disconnect coupler

4.2.3 Tactical Prime Mover: Heavy Interim Truck Tractor (HITT - International WorkStar 7600 SBA 6×6) Gross Vehicle Weight (GVW): 62,000 lbs | GCWR: 26,280 lbs Axle Ratings: Front: 16,000 lbs | Tandem Rear: 46,000 lbs Wheelbase: 217 in (front to tandem centerline) Fifth Wheel: Height: 50–52 in | Front Clearance: 79.5 in | Rear Swing: 99 in (slide: 41 in rear, 14 in fwd) Hydraulic Wet Kit: 2,500 psi @ 13–46 GPM, 1-3/4-in female quick coupler

4.2.4 Tactical Prime Mover: Medium Tactical Vehicle Replacement (MTVR MK31 Tractor) Gross Vehicle Weight (GVW): 62,000 lbs | GCWR: 46,000 lbs Axle Ratings: Front: 16,000 lbs | Tandem Rear: 46,000 lbs | Spread: 56.4 in Wheelbase: 212.2 in | Fifth Wheel: Fixed, 52–59 in adjustable suspension height Clearance: Front Clearance: 62.5 in | Rear Swing: 69 in Hydraulic Wet Kit: Not Applicable

SECTION 5: AIR TRANSPORTABILITY AND LIFT/TIE-DOWN CRITERIA

5.1 Air Transportability (ATTLA Certification)

ATTLA Air Transportability Certification

1. Purpose and Scope This procedural workflow establishes the end-to-end operational and engineering sequence required to achieve United States Air Force (USAF) Fixed-Wing Air Transportability Certification for military equipment and ground vehicles.

Certification applies to transport on the following strategic and tactical airlift platforms:

Lockheed Martin C-130 Hercules / Super Hercules (C-130E, C-130H, C-130J) Boeing C-17 Globemaster III Lockheed C-5 Galaxy / C-5M Super Galaxy

2. Governing Standards and Policy References All submissions, structural assessments, and interface testing must adhere to the following Department of Defense (DoD) directives and military standards:

DODI 4540.07 CHG-3: Operation of the DoD Engineering for Transportability and Deployability Program MIL-STD-1366E: Interface Standard for Transportability Criteria MIL-STD-1791D CHG-1: Designing for Internal Aerial Delivery in Fixed Wing Aircraft (Specifically Section 5.3.3.2 and Paragraph 6.4) MIL-STD-209K: Interface Standard for Lifting and Tiedown Provisions

3. Stakeholder Roles and Responsibilities (RACI Matrix)

4. End-to-End Procedural Workflow [Phase 1: Contract Award & Project Initiation] (Within 10 Days Post-Award) [Phase 2: In-Production Collaboration & Technical Checks] [Phase 3: Final Technical Data Package (TDP) Assembly] [Phase 4: ATTLA Engineering Evaluation & Review] (Within 60 Days) (Deficiencies Found) (Package Approved) [Corrective Action / RFI] [ATTLA Certification Memo Issued] [Phase 5: IOA Verification & Delivery] [SDDCTEA / Pull Test] (Only if required)

Phase 1: Contract Award and Project Initiation [Contract Awarded: GSA/DLA] ──> [Distribute MVDO/Contract] ──> [Sponsor Letter Sent within 10 Days] ──> [ATTLA Opens Project] Award Notification & Documentation:

The Acquisition Source (GSA, DLA, or other agency) notifies the purchasing customer / Government Agency Sponsor of the contract award.

Acquisition Source transmits the award order/contract, including:

Order or contract number (inclusive of all exercised options).

Copy of the Motor Vehicle Delivery Order (MVDO), as applicable.

Purchasing Customer / Sponsor contact info (name, phone, email).

Awarded OEM Vendor / Contractor contact info (name, phone, email).

Sponsor Letter Submission (Deadline: 10 Working Days Post-Award):

The Government Agency Sponsor acts as the official liaison and submits an initial request letter via email to ATTLA (ATTLA@us.af.mil) at Wright-Patterson AFB to open an active project case file.

Mandatory Project Reference Data:

Item Nomenclature / Product Description (e.g., Truck Tractor 20T, Trailer Lowbed HYD RGN 60T).

Acquisition Order / Contract Number and option details.

Copy of the MVDO (if applicable).

Government Sponsor contact information.

OEM Vendor primary point of contact.

Vendor Kick-Off Guidance:

Sponsor delivers the official ATTLA compliance checklist and the Technical Data Package template to the OEM vendor.

ATTLA acknowledges project opening and confirms the aircraft airframes targeted for certification (, , ).

Phase 2: In-Production Collaboration and Technical Checks Throughout manufacturing, the Government Sponsor and OEM collaborate to evaluate Work-in-Progress (WIP), Finite Element Analysis (FEA), 3-view CAD drawings, and prototype fitment.

Critical Geometry & Engineering Verification Checklist The OEM and Sponsor must verify the following parameters against the ATTLA Universal Data Spreadsheet:

☐ Approach Angle: Front clearance angle during aircraft ramp transition.

☐ Ramp Breakover Angle: Underside ground clearance over aircraft ramp crest.

☐ Departure Angle: Rear clearance angle during transition off loading ramps.

☐ Maximum Height Profile: Height, longitudinal station, and identity of the highest physical projection.

☐ Significant Projections: Dimensional coordinates of mirrors, exhaust stacks, winches, pintles, or brush guards.

☐ Individual Axle Curb Weights: Unloaded scale curb weight measured per axle.

☐ Wheelbase & Overhang: Centerline wheelbases, front overhang, and rear overhang dimensions.

☐ Rear Suspension Articulation: Unloaded vertical axle articulation travel under curb weight.

☐ Rear Axle Spacing: Longitudinal distance between multi-axle / tandem / tridem clusters.

☐ Axle & Suspension Structural Margin ():

Verify front axle rating vs. .

Verify rear axle rating vs. .

Verify front suspension rating vs. .

Verify rear suspension rating vs. .

☐ Driveline Integrity on Axle Stop Removal: If axle bump stops must be removed for aircraft crest clearance, verify the driveline remains fully intact, seated, and operational without binding across maximum ramp angles.

☐ Tiedown Provision Geometry & Ratings: Verify provision configuration, directional pull envelope, and structural attachment conform to MIL-STD-1791D (Para 5.3.3.2) and MIL-STD-209K.

Design Interchanges: ATTLA engineers may offer virtual technical assistance (via Microsoft Teams or VTC at no charge) during product development upon sponsor request. On-site ATTLA engineering participation requires travel funding from the requesting procurement office.

Phase 3: Technical Data Package (TDP) Assembly and Submission Upon physical completion of the first production unit, the OEM contractor submits the completed TDP directly to the Government Sponsor's designated mailing address.

Mandatory TDP Elements (per MIL-STD-1791D Para 6.4) ATTLA Universal Data Spreadsheet: Fully populated tabs matching equipment type, using standard naming syntax (e.g., Truck Stake 2-Door 20 Foot Bed 30T).

Dimensional & Visual Data: 3-view dimensioned CAD drawings, high-resolution annotated photographs, and physical envelopes.

Structural Substantiation & Load Calculations:

Complete calculation package detailing engineering assumptions, material specifications, and force balance diagrams.

Structural proof showing compliance of cargo and equipment tiedown provisions under maximum dynamic g-loading.

Proposed Tiedown Pattern: Detailed restraint scheme illustrating chain angle configurations for each cargo aircraft type.

Data Plate Verification: Photographic evidence of a permanent design data plate affixed to the vehicle/trailer indicating certified lifting and tiedown ratings (MIL-STD-209K).

Package Vetting and Forwarding Sponsor receives OEM data package and verifies complete documentation.

Sponsor conducts quality audit to ensure all technical fields, drawings, and calculations are present.

Sponsor officially submits the vetted TDP to ATTLA (ATTLA@us.af.mil) on behalf of the contractor.

Phase 4: ATTLA Review, Analysis, and Certification [Complete TDP Submitted] ──> [ATTLA Technical Analysis] ──> [Resolve Inquiries/RFI] ──> [Approval Memo: <= 60 Days] Analytical Review:

ATTLA performs a detailed engineering analysis of vehicle geometry, axle loading, floor contact pressure, aircraft interior clearance envelopes, and tiedown restraints at no charge to the federal sponsor.

Actual and estimated weights are evaluated against MIL-STD-1791D criteria.

Deficiency Resolution (If Applicable):

If requirements are unmet or data is incomplete, ATTLA provides written notice of rejection with specific remediation instructions.

Sponsor coordinates with OEM to execute design revisions, update calculations, or revise loading procedures.

Certification Memo Issuance:

Once all compliance criteria are met, ATTLA issues the official Air Transportability Certification Memo within 60 calendar days of receiving an acceptable, complete technical package.

The memo defines all approved airframes, flight configurations, shoring requirements, and tiedown schemes.

Phase 5: Post-Certification Verification, Delivery, and Closeout Factory Acceptance Inspection & Scale Weighing:

Contractor furnishes the ATTLA Certification Memo to the GSA Industrial Operations Analyst (IOA).

Contractor provides a certified commercial scale weight ticket showing individual curb weights for all axles on the completed build.

GSA IOA Verification Rule:

The GSA IOA inspects the equipment to verify physical conformance with the certification memo.

The IOA verifies that loaded axle weights do not exceed 80% of rated capacity:

Distribution of Certification:

Contractor supplies the approved ATTLA certification memo with the first production unit.

Sponsor forwards copies of the final certification to Naval Facilities Engineering and Expeditionary Warfare Center (NAVFAC EXWC) branches (EX2, EX4, and/or EX5 as applicable).

Copy retained in project historical files.

5. Non-Standard Workflows A. Delivered / Fielded Assets Lacking ATTLA Certification When equipment or ground vehicles have already been delivered without an Air Certification Memo, the following remediation procedure is enforced:

[Uncertified Asset Discovered] [Sponsor & Acquisition Source Direct OEM] [Option A: Retrieve Asset] [Option B: Local Facility] (OEM retrieves asset back to factory) (OEM arranges certified local retrofit) [OEM Executes Modifications] [Sponsor Audits Changes] [Submit Retrofit TDP to ATTLA] [ATTLA Issues Certification] Direction to OEM: The Government Sponsor, through the Acquisition Source (GSA/DLA), issues formal direction to the OEM to correct the deficiency via either:

Physical retrieval of the delivered vehicle back to the manufacturing plant; or Contracting and overseeing an authorized local repair facility to perform required retrofits.

Modification Completion & Notice: OEM advises the Sponsor in writing once modifications are complete.

Resubmission: Sponsor inspects physical modifications, updates the TDP, and submits the package to ATTLA for formal evaluation and certification memo issuance.

B. Special Assessment: Physical Test Loading and SDDCTEA Pull Testing

1. Physical Flight Test Loading (Uncertain Transportability) Applied when computational engineering analysis cannot conclusively establish loading clearances or structural margins.

Test loadings are scheduled as Special Airlift or Transport Missions (SAAM) requiring a formal test report.

Funding & Coordination: The purchasing customer / Government Agency Sponsor is responsible for formally requesting the test load mission and covering all associated airlift and personnel costs.

2. SDDCTEA Structural Analysis & Testing (MIL-STD-209K) Lead Time: OEM must supply provision dimensional data, material specifications, and structural finite element results to SDDCTEA at least 90 days prior to scheduled physical provision testing.

Objective: Upfront analytical modeling reduces destructive testing risks and may eliminate the requirement for physical pull testing if margins are sufficient.

Agency Coordination:

Surface Deployment and Distribution Command Transportation Engineering Agency (SDDCTEA), Newport News, VA (Phone: (757) 599-1113, Email: dpemail@tea.army.mil).

Aberdeen Test Center (ATC) for physical testing services.

6. Vehicle Configuration Reduction Criteria (1 Man-Hour Rule) If an equipment item must be reduced in size or height to fit cargo door envelopes:

Tool & Time Thresholds:

Mechanically attached (non-welded, non-riveted) components may be removed or relocated using standard hand tools.

Total removal, relocation, and tiedown time must not exceed 1 man-hour.

Reassembly time back to fully operational configuration must not exceed 1 man-hour.

Operational Constraints:

Self-Mobility: Vehicle self-mobility must remain intact in its reduced configuration (must be capable of driving on and off aircraft).

Stowage: Dedicated onboard tiedowns and stowage brackets for removed components must be integrated on the vehicle.

Shoring: The vehicle must load without auxiliary wood shoring unless structurally unavoidable.

Delivery State: The vehicle must never be delivered to the Government end-user in its reduced configuration.

7. Directory of Agency Contacts and Resources

Email: ATTLA@us.af.mil USAF Fixed-Wing Aircraft Air Transportability Evaluations & Certification

Phone: (757) 599-1113 Email: dpemail@tea.army.mil Surface Transportability, Rail Certification, and Provision Design Review

The trailer shall be certified by the Air Transportability Test Loading Agency (ATTLA) at Wright-Patterson AFB for strategic airlift aboard USAF C-17 and C-5 aircraft in accordance with MIL-STD-1791D and MIL-STD-1366E.

Axle & Suspension Load Margins: Axle and suspension ratings shall equal or exceed 1.25 times the curb weight load imposed on each respective axle assembly.

Field Configuration Modifications: Field reduction of items (e.g., headache rack, ramps) shall require no more than one (1) man-hour using common hand tools, and one (1) man-hour to restore. Mobile capability must be maintained.

ATTLA Certification Workflow:

Post-Award (10 Days): Navy Sponsor submits ATTLA project open request letter to ATTLA@us.af.mil.

Build Phase: Contractor completes the ATTLA Universal Data Spreadsheet, CAD drawings, and Finite Element Analysis (FEA) validating structural integrity, ramp breakover, approach/departure angles, and curb weights.

Weight Verification: Contractor presents a certified scale weight ticket confirming curb weight per axle.

Final Acceptance: Final trailer acceptance is contingent upon receipt of the official ATTLA Airlift Certification Memorandum.

5.2 Lifting and Cargo Tie-Down Provisions

Design Standards: All lift and tie-down rings and attachments shall conform structurally to MIL-STD-209K.

Lifting Attachments: Provided such that no spreader bar is required for crane handling. Rated to lift the complete empty trailer (curb weight).

Cargo / Transport Tie-Downs: Sized and positioned along frame channels to secure the trailer with or without payload during rail, sea, and air transit. Pockets must incorporate drain holes shielded to prevent chain contact with air or electrical lines.

SECTION 6: FINISH, COATINGS, AND CORROSION CONTROL

6.1 Surface Preparation

All steel surfaces shall be blasted and thoroughly degreased to remove mill scale, oil, weld spatter, slag, and surface contaminants prior to coating application. Decking material shall be installed after coating curing to avoid paint overspray on composite or wood surfaces.

6.2 Coating System Architecture

Primer / Basecoat: Two-component non-CARC epoxy or zinc-rich primer applied to a minimum Dry Film Thickness (DFT) of 4.0 mils.

Topcoat: Two-component non-CARC industrial polyurethane topcoat applied to a minimum DFT of 4.0 mils.

Color: Flat lusterless Olive Drab Green (Color #34094 per SAE AMS-STD-595A).

Combined Total Thickness: Minimum 8.0 mils DFT across all structural steel.

Corrosion Resistance: Capable of withstanding a minimum of 240 hours of salt spray exposure per ASTM B117 / ASTM D1654 with zero rusting or blistering.

Underbody Wear Protection: Full undercoat abrasion-resistant coating (e.g., Line-X, Tectyl, or approved equal) applied to lower frame web, bottom flanges, wheel wells, and wash-down areas.

Non-Skid Surfaces: Coarse grit non-skid coating applied to all upper horizontal walking surfaces and frame edges.

SECTION 7: STANDARDIZED MARKINGS AND IDENTIFICATION PLATES

7.1 Marking Specifications Template

All identification, operational, and cautionary stenciling shall conform to the following standardized parameters:

Marking Template Specification Font Type: Commercial Stencil Color: Lusterless Matte Black Application: Polyurethane Stencil Paint (alternative laser-engraved or welded metal tags subject to NAVFAC approval; decals prohibited unless expressly authorized) Standardized Stencil Schedule

7.2 Visual Reference Callouts

Figure 1: Side Tie-Down Marking – Stencil placed directly below deck-level tie-down rings on side web.

Figure 2: Dedicated Lift Provision – Lower half of lifting ring highlighted in matte black; "LIFT HERE" stenciled above.

Figure 3: Gooseneck Registration Stencil – Horizontal orientation, centered on gooseneck drop section.

Figure 4: Rear Crossmember Stencil – Centered between tail lamp housings on rear bumper channel.

Figure 5: Tire Pressure Stencil – Located on the outer lower frame rail above wheel dual centerlines.

7.3 Data and Transportation Plates

Construction: All data, instructional, and transportation plates shall be engraved or etched on non-ferrous, corrosion-proof metal plates and mechanically fastened with blind rivets or machine screws (adhesive labels are prohibited).

Transportation & Shipping Plate: Inscribed with complete sling leg lengths, lifting angles, gross weight, tie-down shear ratings, and center of gravity silhouette per MIL-STD-209K.

Vehicle Identification Data Plate Fields:

Nomenclature: TRAILER, STEP DECK, 34-TON Manufacturer Make, Model, and Serial Number U.S. Navy Registration Number (USN) National Stock Number (NSN) Curb Weight / Maximum Payload Capacity / GVWR Max Contract Number and Contracting Agency (NAVFAC EXWC) Date of Delivery (retained blank until DD Form 250 signature) Warranty Period (Months / Miles)

SECTION 8: QUALITY ASSURANCE, VERIFICATION, AND DELIVERY

8.1 Workmanship Standards

Trailers shall be fabricated in a professional manner conforming to AWS and ASME welding codes. Edges shall be radiused, deburred, and free from sharp corners. Wiring, plumbing, and structural components shall exhibit no sags, pinholes, or misalignments. The presence of any of the following shall constitute immediate grounds for rejection:

Cracks, inclusions, porosity, or heavy spatter in welded assemblies.

Paint runs, sags, blistering, flaking, thin spots, or contamination.

Loose fasteners, pinched hoses, non-weatherproofed electrical connectors, or plastic cable ties.

8.2 Compliance Verification Schedule

The contractor shall conduct compliance verification milestones in accordance with the following table:

8.3 First Article Testing (FAT)

First Article operational testing shall be executed at the Government test site:

Testing Destination: Navy Expeditionary Medical Support Command, 565 Antrim Road, Williamsburg, VA 23185-5830.

Scope: 5 business days of functional trials including container securement, cross-country mobility, tractor wet kit compatibility, ramp crest traversal, and ATTLA dimensional verification.

Corrective Actions: If non-conformances are discovered, the contractor shall retrieve the unit, correct deficiencies at zero cost to the Government, and return the unit for retesting prior to production release.

8.4 Manuals, Technical Support, and Warranty

Manual Delivery Milestones:

30–45 Days ARO: One (1) set of baseline COTS Commercial Technical Manuals.

150–180 Days ARO: One (1) complete set of Draft Technical Manuals (searchable PDF and print).

Final Delivery: Approved As-Built Technical Manuals delivered on CD-ROM/digital media and paper binder with each unit.

Technical Support: OEM or authorized distributor support response within three (3) business days; 24-hour emergency telephone support line provided.

Warranty Coverage: Comprehensive 60-month (5-year) bumper-to-bumper warranty starting on the date of final Government DD Form 250 acceptance at destination. Includes all parts, labor, and domestic expedited freight.

8.5 Delivery Locations and Ship-To Addresses

Trailers and modular components shall be delivered FOB Destination in accordance with the GSA Motor Vehicle Delivery Order to:

NAVFAC EXWC Point of Contact:

NAVFAC Engineering and Expeditionary Warfare Center (NFEXWC) 1000 23rd Ave, Bldg. 1100, Port Hueneme, CA 93043 Attn: Sean Nelson (EX223) | Email: sean.r.nelson1.ctr@us.navy.mil Will provide location (vendor must verify 90 days prior to shipment)

8.6 Delivery Hours and Base Access

Delivery Coordination Point of Contact:

NAVFAC Engineering and Expeditionary Warfare Center (NFEXWC) 1000 23rd Ave, Bldg. 1100, Port Hueneme, CA 93043 Attn: Sean Nelson (EX223) | Email: sean.r.nelson1.ctr@us.navy.mil

· (POC verified 90 days prior to delivery) Unstacking Requirement: Trailers must be delivered fully unstacked with wheels on the ground. Any material handling equipment (cranes, riggers, forklifts) required to offload and unstack trailers shall be furnished solely by the delivery contractor.

Delivery Hours: Monday through Thursday, 0800 to 1430 local time (no deliveries on Fridays, weekends, or Federal holidays).

Base Security Notice: Delivery drivers must coordinate physical arrival at least 30 days in advance. Drivers must present valid REAL ID, TWIC, or Veterans ID credentials; commercial licenses marked "NOT FOR FEDERAL IDENTIFICATION" will be refused entry. Drivers must present valid proof of vehicle insurance.