CoatingsPro Magazine

SEP 2018

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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Page 60 of 83

COATINGSPRO SEPTEMBER 2018 61 To tackle this phase of the project, the McCahill crew rolled their Graco 395 sprayers directly onto the boom lifts. Since the lifts were equipped with JLG's SkyPower 7500W generators, the crewmen simply plugged in their 110-v Graco 395s and began spraying. "You just plug in your pump and go anywhere you want with it," said Bulbucan. "e lifts will hold up to 1,000 lbs. [453.6 kg, restricted], but we typically only take up 5 gallons [18.9 L] of coatings due to a limited amount of working time." DTM typically dries to the touch in two hours at 77 °F (25 °C), according to the Sherwin-Williams technical data sheet. With the ground work, dust storm, and etching primer behind them, the crew geared up to install a three-part Sherwin-Williams coating system that would fight corrosion and keep Ozinga's new concrete facility looking good for years to come. Aerial Assault Wearing proper personal protective equipment (PPE) through- out the job, such as gloves, long-sleeved shirts, and hard hats, the crew got to the coatings system. ey used brushes and ⅜-inch (9.5 mm) nap covers on 9-inch (22.9 cm) rollers to hand prime every surface, nook, and cranny with two coats. ose coats, Sherwin-Williams Macropoxy 646, a polyamide epoxy designed to protect steel in industrial exposures, were each applied at an average thickness of 3 mils (76.2 microns) DFT. e two-part system (1:1 by volume) is a high-solids, high-build formulation that helps ensure adequate coverage on sharp edges, corners, and welds. ere was nothing easy about this aerial assault! "W hen you're up 120 feet [36.6 m], and there are 10,000 corners you have to paint, it can be challenging," said Bulbucan, an 18-year McCahill employee. e project manager offers some good advice for working at heights that make clouds on the horizon seem level to the eye. "Find ing f lat g round for any boom lif t is cha l leng ing ," said Bu lbucan. "Unless you're on an obv ious slope, ever y- thing looks f lat when you're dow n on the g round. But when you're that high up and its w indy, subt le var iances get ampli- f ied. Sure, the machines have sensors, but it 's not a good idea to go a l l the way up only to have to go back dow n to ma ke sure you're on f lat g round. So check the ter rain caref u l ly in advance." Macropoxy 646 has a maximum recoat window of one year, but the McCahill crew was rocketing toward the finish line with no time to spare. With brushes and rollers in hand, they applied a single topcoat of Sherwin-Williams Acrolon 218 HS again at an average thickness of 3 mils (76.2 microns) DFT. at completed the project on time despite the tough conditions and setbacks. "I feel satisfied about our accomplishment," Bulbucan said. "I can't overstate the importance of a three-coat system on a project like this. In this environment, you need to build up the coating system thickness, and the best way to do that is a three- coat system. Any time a customer decides to pay for that extra coat, you can be sure they're going to make their money back in years to come. It's not just longevity. But whenever someone goes back for maintenance in years to come, they're refreshing it, rather than re-prepping or running into work that could require facility downtime." Ozinga Ready Mix Concrete was very pleased with the outcome of McCahill Painting's aerobatic performance. "ey didn't call me up and thank me or any of that," said Tim McCahill. "at's what they expect when they hire me. But in the months following this project, we did five or six more jobs for them. at's thanks enough!" CP The final coat was Sherwin-Williams Acrolon 218 HS, which was again using spray equipment or brushes and rollers. And with that, the McCahill Painting crew signed off on the three-coat system. Steel Coatings VENDOR TEAM Graco Inc. Equipment manufacturer 88 11 th Ave. NE Minneapolis, MN 55413 (612) 623-6000 Honda Power Equip. Group Equipment manufacturer 4900 Marconi Dr. Alpharetta, GA 30005 (770) 497-6400 com JLG Industries Inc. Equipment manufacturer 1 JLG Dr. McConnellsburg, PA 17233 (717) 485-5161 The Sherwin-Williams Company Coatings manufacturer 101 Prospect Ave. NW Cleveland, OH 44115 (216) 566-2000 Stevenson Crane Equipment distributor 410 Stevenson Dr. Bolingbrook, IL 60440 (630) 972-9199

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