DEFENSE SHIPBUILDING • NAVSEA 009-84 • SHORING & RIGGING AUDIT

NAVSEA Heavy Modular Rigging & Shoring Audit Checklist

Mandatory pre-haul inspection protocol for heavy naval submarine and surface warship modular transfers: cradle contact pad compression, hydraulic SPMT stroke balance, linkspan bridge deflections, and defense security approvals.

01 Shoring & Hydraulic System Verification

Overall NAVSEA Quality Score: 98 / 100 • EXCELLENT

02 NAVSEA 009-84 Compliance Certificate PASSED • READY TO ROLL

Cradle Contact Pressure 1.42 MPa Allowable Limit ≤ 2.50 MPa
Hydraulic Suspension Balance ± 3% Delta 3-Point Iso-System Active
Drydock Linkspan Deflection: < 12mm Continuous Laser Monitored
Structural FEA Stamp (PE Naval Architect): Certified NAVSEA 009-84 Rev F
Security Corridor Clear: Armed Escort & Restricted Airspace Logged
NAVSEA Audit Signed • Pre-Roll Briefing Scheduled

All shoring tie-downs locked. Hydraulic relief bypass valves set to 280 bar. Yard transfer path swept for debris and clear of personnel.

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01

Pre-Haul Shoring Inspections

Shoring saddles and cribbing towers must undergo non-destructive examination (NDE) prior to loading multi-thousand ton naval modules. Ultrasonic thickness testing and magnetic particle inspection ensure no micro-cracking exists along critical structural fillet welds.

02

Hydraulic Stroke Reserve

Multi-file SPMTs must never operate near maximum or minimum cylinder stroke limits. A mandatory ±150mm dynamic reserve must be maintained at all times to compensate for shipyard apron slopes, linkspan transitions, and unexpected ground settlement.

03

Linkspan Slope Limits (≤1.5%)

Transferring from building way apron to graving dock transfer cars or barges involves transition ramps. NAVSEA 009-84 strictly enforces a maximum slope of 1.5% to prevent internal module equipment shear and keep saddle contact pressure strictly uniform.

Register NAVSEA 009-84 Shoring & Rigging Audit

Authorize pre-transit structural audits, professional naval architect PE stamps, and specialized defense shipyard heavy haul quality oversight.