Case Study

Global Mobile Communication Company

Switch Room 3 Addition

As a successful network provider with nearly 70 million customers nationwide, this mobile communication company places a high value on critical environments that are both efficient and reliable. That’s why they turned to Salas O’Brien for the redesign of one of their key critical environments in Norton, Massachusetts.

The Salas O’Brien team provided mechanical, electrical, and plumbing (MEP) engineering services for this project, as well as architecture, construction management, and fire protection services. The client’s goal was to convert Norton’s existing control and training rooms into a new, 2,000-square-foot, raised-floor switch room that could support critical systems. To accomplish this, our engineers designed n+1 redundant MEP systems that support 150 watts per square foot (w/ft²) and installed a Liebert DSE Computer Room Air Conditioner (CRAC) that provides humidity control using the raised access floor and ceiling plenums for air distribution. The project also involved the installation of new OptiCool indoor chiller pack and refrigerant pump systems (ICPs and RCPs) for further environmental control.

These new systems required reinforcement both inside and outside the new switch room. ICP and RCP condensers and HVAC equipment servicing the switch room were added to the roof of the facility, supported by a 1,200-square-foot structural platform designed by Salas O’Brien. The added platform includes a louvered screen wall to shield the equipment from outside view.

The new switch room is also supported by a new FM200 fire protection zone both above and below its raised access floor. Salas O’Brien designed this zone and also modified the building’s existing pre-action sprinkler system so it would protect the new switch room along with the rest of the building.

The finished switch room met and exceeded our client’s goals for safety, efficiency, and reliability, and it has enabled them to continue providing quality and value to their customers throughout the region.


Norton, Massachusetts

Construction Cost:
$4 Million

Project Size:
2,000 Square Feet

Architecture, Construction Management, Fire Protection, Mechanical, Electrical, and Plumbing Engineering