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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COATINGSPRO SEPTEMBER 2018 59 components could be hoisted and installed by other trades," Bulbucan said. "Working on the ground saved us time and money because our cost to rent the 185-foot [56.4 m] boom lift was about $1,000 a day. It was also easier to blast on the ground rather than up in the air." at blast was to NACE No. 1/Society for Protective Coatings (SSPC) Surface Preparation (SP) 5: White Metal Blast with an average 2-mil (50.8 microns) anchor profile. To keep abrasive blast dust from getting blown all over the jobsite, the crew brought in a Graco EcoQuip fluidized abrasive blaster. is combines pressurized water and abrasive in a pot. e mixture is precisely metered into the airflow, and when the wet abrasive impacts a surface, the additional water weighs the particles down, creating much less airborne dust. To overcome unpredictable winds coming off Lake Michigan, the crew needed a strategy to prevent "wind days" — days in which high winds kept the crew off the boom lifts altogether or forced them to work at substantially lower heights — from putting the project in a holding pattern. On an under- taking with no room for failure, any series of small delays can easily put productivity behind schedule. Pressure to finish on time loomed large, so how did the McCahill crew do it? "W hen you're up there on the boom and the wind is blowing, the platform is moving around a lot," Bulbucan said. "This was a very large, sensitive project," said company owner Tim McCahill. "We'd need to brush and roll and work from boom lifts," he continued. When working or rappelling from the telescope boom lifts or on stairwells or bridges, the crew wore safety harnesses and used lanyards. The crew used JLG 1850SJ, 1350SJP, and 800S lifts. JOB AT A GLANCE PROJECT: To apply a coating system to stairwell, bridges, and other structures surrounding a new-build concrete storage silo COATINGS CONTRACTOR: McCahill Painting Co. 324 Rocbaar Dr. Romeoville, IL 60446 (815) 886-5544 SIZE OF CONTRACTOR: 15 employees SIZE OF CREW: 5 crew members PRIME CLIENT: Ozinga Ready Mix Concrete, Inc. 18825 Old Lagrange Rd. Mokena, IL 60448 (708) 479-3080 SUBSTRATE: Steel CONDITION OF SUBSTRATE: New SIZE OF JOB: ~47,000 sq. ft. (4,366.4 m²) DURATION: 3 months UNUSUAL FACTORS/CHALLENGES: » Much of the work was done from boom lifts as tall as 185 feet (56.4 m). » The crew had to cope with high winds off Lake Michigan. » Several other trades were also working on site. MATERIALS/PROCESSES: » Used a fluidized abrasive blaster on the ground to achieve NACE No. 1/ Society for Protective Coatings (SSPC) Surface Preparation (SP) 5: White Metal Blast with an average 2-mil (50.8 microns) anchor profile » Spray applied Sherwin-Williams DTM Wash Primer at an average of 1 mil (25.4 microns) DFT on the galvanized surfaces » Applied two coats of Sherwin-Williams Macropoxy 646 at an average of 3 mils (76.2 microns) dry film thickness (DFT) each, using spray equip- ment on the ground and brushes and rollers at heights » Applied Sherwin-Williams Acrolon 218 HS at an average of 3 mils (76.2 microns) DFT, using spray equipment on the ground and brushes and rollers at heights SAFETY CONSIDERATIONS: » Wore personal protective equipment (PPE) that included gloves, long-sleeved shirts, and hard hats » Used safety harnesses and lanyards whenever rappelling or working on stairwells, bridges, or boom lifts

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