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82 JANUARY 2017 COATINGSPROMAG.COM 22 Lo-Mod Overlay Broadcast System. Using a Graco XP70 plural-component sprayer, the crew laid down the deck coating. en, they squeegeed the liquid into 30 to 40 mils (762.0–1,016.0 microns). With two layers, they achieved the desired thickness of 100 percent solids epoxy. e crew also broadcast #4 flint aggregate to rejection into each layer of coating. "Imagine spreading out peanut butter and putting peanuts on top and then whatever doesn't stick, you drive over it, sweep it back up, and recycle to utilize again," Cielocha explained of the coating system application. W hen temperatures were above 40° F (4.4° C), the coating would take between four and six hours on average to cure. W hen it was below 40° F (4.4° C), though, it took up to 24 hours before cure and recoat. Coatings nor crew were fans of the cold! All-Around Safety With only a year to complete the project, the crew had to keep on keeping on, even during the cold winter months. It helped that they got the top level completed right away when the temperatures were still manageable. "Since we started in August, we wanted to make sure we got the top deck coated before winter came," Bouckaert explained. But as they moved down the garage, so too did the temperatures. at meant using concrete blankets and heat to continue the work when it fell below 40° F (4.4° C). And with the man-made heating, so, too, came the safety protocols. "With the heat, you have to make sure you have the right ventilation. You have to have carbon monoxide tests. If something would backflow in, it's a deadly killer, so you have to be on top of that," Cielocha said. "You have to keep your equip- ment outside the area. So if you have a compressor, you have to make sure you locate that equipment so you don't blow those fumes into the area. It's almost a daily thing — to make sure the diesel fuel fumes aren't circulating back into the area." In addition to safety gear and protocol, McGill Restoration also retains a safety consultant to help evaluate jobsites, set up special working conditions, and identify potential unsafe working hazards. e consultant comes to jobsites as needed and ensures that all safety protocols, standards, etc., are considered and followed. On this job, part of the safety protocol The final layer for ver tical and overhead area s wa s the topcoat: PPG's PERMA-CRETE. The crew applied the coating to all vertical and overhead areas at 8–10 mils (203.2–254.0 microns) total DFT. Work had to be done on all surfaces — overhead and vertical areas included. For work on Bil-Jax boom lifts, which included repair work using Twin City Concrete's shotcrete, the 12- to 20-person crew wore harnesses. The coating system included Sikadur 22 Lo-Mod Overlay Broadcast System. The crew applied two layers of that by spray and then squeegee at 60 to 80 mils (1,524.0–2,032.0 microns) total dr y film thickness (DFT). The horizontal area s required both patching and prep to achieve Concrete Surface Profile (CSP) 5 on the top deck, they also installed a joint expansion. Parking Garage Rehab