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Concrete Slab Maker Uses RFID to Track Netting
Structural Metal Decks employs passive RFID tags to track the safety nets it installs at job sites where it constructs composite decking.
Apr 07, 2009—When Structural Metal Decks Ltd. (SMD), one of the United Kingdom's largest providers of composite concrete flooring, faced the prospect of laying off workers due to the current economic downturn, the company discovered a way to keep them employed by providing its own safety nets in house, and by tracking them with radio frequency identification. The RFID system, provided by British firm Core RFID, enables the structural floor company to track the location and condition of its own 500 safety nets, previously leased from outside sources.
The company has provided flooring in such locations as London's Heathrow Airport and 02 Arena, as well as at Dubai's Ski Dubai resort and Burj Dubai hotel, installing 1 million square meters (10.8 million square feet) of flooring each year, with approximately 500 projects in the same timeframe.
Initially, Galway says, the company tried a tracking method that utilized bar-coded labels attached to the nets, but found that the labels could not withstand the rigors of the job site without becoming unreadable due to dirt or damage. Tracking the nets manually by means of a label printed with a human-readable seven-digit serial number, he says, was out of the question since the nets are stored in a warehouse where blowing wind and rain can make it very difficult for employees to handwrite the serial numbers on a piece of paper to be stored in the office.
In mid-March 2009, SMD launched an RFID system, provided by systems integrator CoreRFID, that includes tags for the nets themselves, as well as two Motorola MC35 handheld computers with built-in RFID interrogators and CoreRFID's Portable Data Collector software to manage the data related to those reads. This information includes when the nets are inspected, where they are sent and when they return. HID Global HF 13.56 MHz tags, compliant with the ISO 15693 standard, are applied to the corner of each safety net. These tags store a unique ID number linked to data regarding that net in SMD's back-end system, such as its manufacturer, date of manufacture and seven-digit serial number, as well as where it has been used. CoreRFID can host the server that stores such data, says John Williams, CoreRFID's marketing manager. In this case, however, SMD opted to host its own server, and worked with CoreRFID to locate the best point for attaching the tags.
As the nets are used and their tags repeatedly read, additional information about them accumulates, including the projects for which they were deployed, the time at what the nets were used, who booked a particular net for a specific job, and details regarding all repairs, tests and inspections.
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