Commercial Construction & Renovation

JAN-FEB 2014

Commercial Construction & Renovation helps our subscribers design, build and maintain better commercial facilities by delivering content to meet the information needs of today's high-level executives.

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104 CommerCial ConstruCtion & renovation — January : February 2014 federal construction • AlAskA goose creek correctionAl fAcility the slab. The rest of the conditioned space has Greenheck VAV boxes to deliver ventilation and heat, and fn-tube baseboard is used in sev- eral locations. Snowmelt in outdoor recreation areas, loading docks and sidewalks uses 14 miles of 5/8-inch PEX tubing. A 50/50 glycol/ water mixture protects the pipe from freezing. Gang showers, a laundry and a kitchen that prepares nearly 5,000 meals every day draw copious amounts of domestic hot water. In addition to the indirect tanks, Aerco Smart Plate indirect water heaters are installed remotely at numerous places through- out the prison. Given the sheer quantity of water and the numerous loads call- ing on the system, there had to be ample room for fuid expansion. Three, 260-gallon Taco expansion tanks are tied into the system. Heavy metal "It's not easy welding 8-inch pipe into place when you're 15-feet in the air," says Lead Pipeftter Dale Corbin. "Getting some of those large sections in place took several guys, and a lot of time." With a piping system as large as the one at Goose Creek, and given the amount of time that material was exposed during instal- lation, a quality air and dirt separator was a necessity, especially at start-up. As with all Taco and Aerco components on the job, Troy Nibert at Proctor Sales in Anchorage supplied a 12-inch inlet, 4900 series air and dirt separator and boiler vent. Together, the Benchmark boilers use 46 feet of 22-inch Schebler vent. All water heaters and smaller stand-alone boilers were vented individually, but with the same AL294C material. "The secondary hydronic loop uses Taco KS6011 pumps with 25-horsepower motors," Nibert says. To really shrink the foor space footprint for each pump, a suction diffuser is installed on the inlet side of the pump, and a 6-inch multi-purpose valve on the discharge side. Taco's multi-pur- pose valves kill three birds with one stone, act- ing as a check, plug, and balancing valve. The suction diffusers eliminate the need for long, straight pipe runs on either side of the pump. "Taco is one of our favored manufac- tures because of good local representation by Proctor sales, and it's a quality product," McNeal says. In Alaska, a rep willing to travel is worth his weight in gold. Good conduct The prison is designed with sustainability in mind – not for the glamour of going green – but rather to keep operating and maintenance costs Distribution pumps and glycol make-up tank for the medical/admissions area of the Support and Visitation building at the Goose Creek Correctional Facility, near Anchorage. CCR-JanFeb.14_XX-CVR4.indd 104 2/7/14 1:57 PM

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