John Thomas Signal Trailer
Dixon, IL United States | 2016
When your construction site calls for more than a truck full of orange barrels to safely guide motorists across the roadway, JTI portable traffic lights are up to the task. The solar powered units are built to provide consistent traffic light operation during remote roadway construction.
They turned to their local galvanizer for assistance. A couple of meetings, a visit to the galvanizing kettle, and a design tweak later, JTI had a plan and put it into play.
Extreme weather, sodium chloride, and various sizes of vehicles are just a few of the challenges that the engineers at JTI had to account for when designing their portable traffic lights. The units had originally planned to be painted in the standard construction orange color, but JTI was finding the service life of the units was severely jeopardized as the inside of the tube steel frames rust out quickly. The units are made from thick steel so that they are heavy enough to not blow over. The steel size makes the unit cost expensive and JTI realized that the reputation of their company was on the line. They needed a solution that would improve the longevity of their product. With multiple sizes and designs to account for, JTI turned to their local galvanizer for assistance. A couple of meetings, a visit to the galvanizing kettle, and a design tweak later, JTI had a plan and put it into play. With galvanizing offering full coverage protection, JTI is looking to more than double the amount of time between services. In fact, with galvanizing as the corrosion protection, JTI will be pulling units in for service to work on the wiring and lighting components sooner than the galvanized steel frames will need.
The full coverage protection is not only needed for the longevity of the portable traffic lights, but it also helps the day-to-day function of the telescoping arm that holds the lights. Our roadways have quite the varying difference between the size and function of the motor vehicles that operate on it. With that being the case, the units need to be able to extend the traffic lights out to a standard area that motorists are accustomed to looking for when driving. With the units being painted, rust inside of the telescoping parts of the arm was causing friction and greatly reducing the function of the units. What was their biggest advantage in the market was now a sticking point. The full coverage of galvanizing allows for the telescoping arm to work smoothly in real world applications.
On a construction site, the safety orange color is king. JTI is currently putting reflective striping on the galvanized frame portion of their units and orange paint on the sheet metal component covers. JTI is looking into duplex coating as an option for municipalities and states that require full safety orange color on the trailers. They will also be looking to get the galvanized units out to costal states that have the marine air causing quick corrosion on the paint only units.
Sterling, IL United States
Coating Durability, Corrosion Performance, Life-Cycle Cost
trailer structure and extendable signal arm
AZZ Galvanizing - Dixon
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