Case Study

Digital Realty Data Center

56 Marietta Street (ATL 56)

Digital Realty is the world’s largest full-scale data center provider. Operating a data center in Atlanta—home to the southeast’s largest concentration of telecommunications companies, sitting atop most of the fiber connecting New York and Florida—was a no-brainer. Atlanta serves as a hub for transportation and global logistics, and has been named the nation’s second most wired city. The location offers businesses more choices for carrier-neutral interconnection, colocation, and data center access than any other location in the region.  

This 160,000 square foot project (formerly owned by Telx) repurposed a 1950s building originally designed to serve as a printing press and bomb shelter, making it ideal to carry the significant weight of a data colocation center. Salas O’Brien embraced the particular challenges the project presented, tailoring designs and finding ways to balance project cost, maintenance, and performance. Our team provided mechanical, electrical, plumbing, and fire protection engineering as well as design-build assessment and budget assistance.

The data center is supported by five transformers with power supplied by multiple power substations and 14 generators with more than 10,000 gallons of fuel storage. The mechanical system includes computer room air conditioning (CRAC) units served by a water fluid cooler system. The fire protection system includes a dry pipe pre-action system throughout the mission-critical area and has a redundant release protocol preventing accidental discharge.

The result was an overwhelming success and has provided Digital Realty with a building fortified enough to meet the demands of a bright, productive future.




Atlanta, Georgia

Construction Cost:
$56 Million

Project Size:
160,000 Square Feet

Mechanical, Electrical, Plumbing, and Fire Protection Engineering, Design Build Assessment, and Budget Assistance