RFID Inspection Tracking for a Lifting Equipment Rental Fleet: 12,000 Items, No Overdue Gear in Service

The Client

A lifting and rigging equipment rental company operating from four depots across Germany and the Netherlands, supplying certified lifting gear — slings, shackles, hooks, beam clamps, chain blocks and wire rope assemblies — to construction, shipbuilding and industrial maintenance contractors. The company's active fleet comprises approximately 12,000 individual items, each subject to periodic thorough examination under EN 818-7 (textile slings), EN 1677 (chain components) and the relevant national implementation of the Machinery Directive.

Inspection intervals range from 6 to 12 months depending on equipment type and use classification. Items flagged as failing examination must be permanently removed from service and destroyed — a process that had historically not been enforced consistently due to the manual nature of the record system.

The Challenge

At any point in time, the company had equipment distributed across up to 60 active hire sites, with items returning to depot at different times from different sites. The paper-based inspection system had four documented failure modes:

• Overdue items returning to hire: when items came back to depot, receiving staff matched them to inspection records by reading stamped reference codes — a slow, error-prone process. An internal audit found that approximately 3% of items returning from hire had overdue inspection status but had been re-issued without flagging. At 12,000 items, this represented roughly 360 potentially non-compliant pieces in circulation.
• Destroyed items reappearing: items that had been marked for destruction were sometimes incorrectly returned to stock, because the destruction marking was a coloured tag (physical rope tag) that could be accidentally removed or confused with a service tag of a similar colour.
• Loss at site: without item-level tracking through the hire lifecycle, the company could not determine whether missing items had been lost at site, returned without being received into stock, or destroyed without record. Annual write-off of unaccounted items was approximately 4% of fleet value.
• Manual re-issue screening: receiving staff had to check each item against a printed inspection schedule — a process taking 4–6 minutes per item on average, creating a bottleneck at all four depots during peak return periods.

The Wintag Solution

The solution required tags that could be applied to three mechanically different item types with different fixing constraints: steel hooks and shackles (rigid metal, with threaded or riveted fixing options), textile slings (flexible, cannot be drilled or riveted through the load-bearing section), and chain assemblies (individual links cannot be tagged; end fittings are the attachment point).

Wintag developed two tag formats to cover the full fleet:

Format A — Rigid on-metal tag for hooks, shackles and end fittings:

• Compact on-metal UHF tag (28 × 12 × 6 mm), epoxy-encapsulated, Impinj Monza R6-P chip, EPC Gen2
• M3 stainless steel countersunk screw fixing into a pre-drilled recess in the non-load-bearing section of each hook or shackle body
• IP68 rated; tested to IK08 (5 J) impact resistance
• 256-bit user memory: stores next inspection due date, current status and WLL class
• Read range on steel: 2.1–2.8 m with Zebra RFD90 handheld

Format B — Flexible encapsulated tag for textile slings:

• Slim semi-rigid UHF tag (45 × 15 × 4 mm), TPU-encapsulated for flex tolerance, sewn into a reinforced pocket at the tag zone of the sling label plate
• Withstands ISO 6330 industrial laundering equivalent (60 °C, 200 wash cycles validated) — required for slings that are pressure-washed at depot between hires
• IP67 rated; designed to survive the sling body flexing under load without inlay fatigue fracture

Depot process redesign: Wintag worked with the client's operations team to define the RFID-enabled check-in and check-out workflow. A fixed RFID portal gate was installed at each depot's goods-in counter, connected to the hire management system. As items are returned and placed in a bin passing through the gate, the system automatically:

1. Identifies every tagged item in the bin (bulk read, no line of sight required)
2. Checks each item's inspection status against the CMMS
3. Flags overdue items immediately on the receiving screen
4. Prints a "return confirmation" label listing all received items and their status

Items flagged as overdue are routed directly to the inspection queue and locked in the system against re-issue until an inspection record is entered. Items previously marked for destruction carry a "DESTROYED" status in the CMMS; if a destroyed item's tag is ever read at a gate or by a handheld reader, the system triggers an alert — providing a final safety net against items that were physically destroyed but whose tag somehow survived.

The Results

Results measured at 12 months post-deployment across all four depots:

• Overdue items returned to hire: 0 — the gate portal screens every returning item automatically; no overdue piece passed back into the hire queue in the 12-month period
• Check-in processing time reduced by 78%: from 4–6 minutes per item to under 60 seconds per bin of 20–30 items — driven by bulk reading at the portal gate vs. individual barcode scanning
• Annual fleet write-off reduced from 4% to 1.2%: item-level hire tracking identified where losses were occurring (predominantly at specific long-term hire sites); the company implemented site-level audits as a result
• Zero "ghost returns" (items marked destroyed reappearing in stock) in the 12-month period
• Regulatory audit outcome: a notified body audit of the company's inspection management system returned a finding of "no non-conformances" for the first time in three consecutive audit cycles
• Tag survival rate: 99.4% — 72 Format A tags required replacement due to mechanical damage (impact from dropped loads); 0 Format B tags failed

Technology Used

• Format A tag: Wintag custom on-metal UHF — EPC Gen2 (ISO 18000-63), Impinj Monza R6-P chip, 256-bit user memory, epoxy enclosure, IP68, IK08. M3 SS countersunk fixing.
• Format B tag: Wintag custom flexible UHF — EPC Gen2, TPU encapsulation, ISO 6330 wash-rated, IP67. Sewn-in pocket fixing.
• Frequency: UHF 865.6–867.6 MHz (EU band)
• Portal reader: Zebra FX9600 fixed UHF reader with two circular polarisation antennas at goods-in counter (client-supplied and integrated by system integrator; Wintag validated tag compatibility)
• Handheld reader: Zebra RFD90 (inspection teams, field use)
• Integration: tag EPC linked to hire management system via CSV import; CMMS (custom in-house) API integration by client's IT team
• Volume: 12,000 tags (approximately 7,200 Format A, 4,800 Format B) + 600 spares