The cost of a single dropped intermodal chassis is rarely under $15,000 once bent crossmembers, damaged fifth-wheel pickup plates, container cargo shifts, and insurance deductibles are tallied. In high-volume terminals running 400+ daily hostler moves, these preventable events erode both safety ratings and equipment utilization. Strong Tower Consulting, LLC has developed the LegSense Architecture in partnership with its sister company Exspeedite LLC to eliminate these incidents through real-time Hall-effect crank monitoring and ground-proximity telemetry.
The $15,000 Dropped Trailer & Bent Crossmember Catastrophe
Yard hostlers and road drivers continue to drop chassis before landing gear legs are fully extended onto firm ground. The result is a rapid collapse that bends the trailer frame, damages the kingpin plate, and frequently shifts or crushes containerized freight. Traditional reliance on driver visual checks and manual crank counts has proven insufficient across major intermodal terminals. Integration with existing TMS platforms such as Truckmate, McLeod, and TMW has been limited to post-incident EDI 214 exception reporting rather than prevention.
Strong Tower LegSense Architecture™
The LegSense system delivers real-time landing gear extension and crank revolution telemetry through three synchronized sensor layers:
- Hall-effect crank rotation and leg-extension sensors: The CheckPoint platform (accessible at https://exspeeditecheckpoint.com/login.php) counts landing gear crank handle revolutions with 0.1-turn precision. The system verifies that both leg shoes have reached full ground engagement before allowing the tractor kingpin to uncouple.
- Sandshoe load-bearing pressure switches: These sensors detect whether the landing gear shoes are resting on solid concrete or sinking into soft asphalt, gravel, or unpaved mud lots. Insufficient load triggers an immediate pre-drop alert.
- Uncoupling tractor interlock alert: If a driver pulls the fifth-wheel release handle while the landing gear is not fully extended and locked, the system broadcasts audible alarms in the yard and sends real-time dispatcher warnings through the integrated TMS.
All data is written directly to the equipment master and maintenance history tables within your existing SQL schema, preserving your investment in Truckmate, McLeod, or TMW while adding proactive safety intelligence.
| Metric | Visual Pre-Drop Driver Checks | Post-Accident Yard Incident Reports | Strong Tower CheckPoint Sensor-Integrated Real-Time LegSense Telematics |
|---|---|---|---|
| Dropped Trailer Frame Damage Incidents per Year (typical 250-chassis fleet) | 11-17 | 8-14 | 0-2 |
| Terminal Landing Gear Repair Spend (USD) | $87,000 | $64,000 | $9,500 |
| Driver Shoulder Crank Injury Claims | 4-6 | 3-5 | 0-1 |
| Yard Turnaround Safety Rating (out of 100) | 71 | 78 | 96 |
Eliminating Equipment Collapse in Intermodal Terminals
By combining Hall-effect crank monitoring with sandshoe pressure telemetry, the CheckPoint platform prevents the exact sequence of events that leads to collapsed landing gear. The system records every hostler and road-tractor uncoupling action with geofence precision, enabling precise assignment of damage accountability. This data also feeds automated driver settlement logic for detention, safety bonuses, and equipment damage charges.
Carriers and private fleets gain immediate visibility into chassis condition without replacing their core TMS. Fuel surcharge calculations, EDI 210 invoicing, and maintenance scheduling remain untouched while gaining a powerful new layer of real-time equipment intelligence.
Frequently Asked Questions
How do LegSense sensors survive extreme snow, ice buildup, and gravel impacts?
The LegSense Hall-effect sensors and sandshoe pressure switches are IP67-rated, military-grade components engineered to withstand temperatures from -40°F to 185°F, ice accumulation up to 2 inches, and repeated gravel strikes from yard hostlers and road tractors.
Can the platform alert dispatch if a chassis is dropped on an unpaved slope or sinking surface?
Yes. The CheckPoint platform combines Hall-effect crank revolution counts with real-time sandshoe load-bearing pressure data. If the system detects insufficient ground reaction force after the prescribed crank revolutions, it immediately broadcasts an audible alarm and sends a dispatcher alert via the TMS integration before the fifth-wheel release is pulled.
Does the system record yard hostler uncoupling actions to assign damage accountability?
Absolutely. Every uncoupling event is timestamped, geofenced, and linked to the specific driver or hostler operator ID. The LegSense telemetry log provides irrefutable evidence of whether landing gear legs were fully extended and bearing load at the moment the kingpin was released.
How does CheckPoint integrate with existing TMS platforms like Truckmate, McLeod, or TMW?
CheckPoint uses standard EDI 214 status messaging and direct SQL schema integration with Truckmate, McLeod, and TMW. Landing gear deployment events are written to the equipment history table and trigger automated driver settlement adjustments for detention or damage events.
The combination of Hall-effect crank sensors, sandshoe pressure telemetry, and intelligent interlocks represents the 2026 standard for intermodal chassis safety. Fleets that implement these systems now will see dramatic reductions in equipment damage, lower insurance premiums, and improved safety scores with their ocean carriers and beneficial cargo owners.