To achieve this ambitious task and meet the required illumination levels with economically reasonable and safe pole spacing, Quattro proposed to incorporate into its PRO650S, a cut off optical system composed of its hydro formed OCB reflector with a type III distribution. Using a 150W HPS horizontal lamp, this system offers superior photometric performances. Not just minimizing the light pollution as defined by the Dark Sky association, this optical system offers a better visual comfort, and a reduction of the spill and dazzling that can cause accidents.
Quattro then proposed to install 34 staggered luminaires spaced 38 meters to cover the bridge span which is 625 meters long by 18.8 meters wide. Two decorative luminaires where added on the Saint-Eustache approach.
Structural calculations were also performed to confirm that the poles were capable of withstanding the wind and ice loads as defined by the Ministry standards.
Also, the luminaries had to conform to the MTQ standard no.8301 art. 3.5. regulating vibration test. Therefore the PRO650S was tested against impact and vibration in accordance to the PSEL-01 procedure for bridge installation.
The objective of the tests is to evaluate the capability of the equipment to sustain solicitations that are likely to occur during its useful life for a standard bridge application. A 100 000 cycles, vibration test was them performed in all axes (x,y,z) at the resonant frequencies of the unit under test. The acceleration for a bridge luminaire is 3.0g. The unit was also tested for impact at 10g for 20 ms in the same tree axis, in both directions (positive, negative). A total of 6 impact tests were performed on each tested units.
Following all those tests, the unit has to be in a working condition and under X rays testing not show any crack or damage to the shell or the tenon. All hardware and ancillary components must be in place and show no damage. As well, gaskets, hinges or clips must not show any sign of wear and cracking.
Results for each sample under the described tests:
Quattro’s PRO650S light fixture passed all the tests in each of the three perpendicular axes therefore demonstrating its compliance with the referenced standard.
In conclusion, the luminaire tested, Quattro’s PRO650S in this case,did not show any signs of damage in terms of physical integrity pursuant the endurance test. The luminaire remained intact and the service tray remained adequately closed without any of its parts coming loose.
Thanks to judicious planning and smart engineering plus an adequate usage of the pole, bracket and luminaire the lighting design of the bridge will offer a comfortable and safe night environment for motorists and pedestrians.
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