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Bailey Junior High School Addition & Renovation

Arlington, Texas

Expertise

  • Education

Services

  • mechanical / plumbing engineering
  • electrical engineering

Size

  • 148,991 SF

BHB provided MEP engineering design services to perform renovations and updates to the aging interior of Bailey Junior High School in Arlington ISD. The $23.7 million, 148,991-square-foot project included renovations to student restrooms for ADA compliance, electrical and HVAC infrastructure replacements, library and office renovations, a new secure main entrance, a new administration suite, a 10,000-square-foot expansion and renovation of kitchen and cafeteria, and 10 new classrooms within a new ICC 500-rated storm shelter. During the assessment, it was determined the building also needed a complete new roof as well as the replacement of numerous windows for waterproofing and energy efficiency.

The mechanical design required detailed site investigation to assess the existing equipment and to integrate new systems, and coordination to ensure the storm shelter would be fully ICC 500 compliant. BHB utilized a combination of chilled water rooftop units, variable refrigerant flow systems, and DX rooftop units. Each system was designed to meet the specific need within each area. Finally, BHB specified updates to the existing chilled water central plant, including two new air-cooled chillers.

The plumbing design focused on integrating an expanded kitchen and dining area into the existing infrastructure. BHB coordinated with the civil engineer to relocate site utilities and with the Owner to relocate and upgrade the existing natural gas and domestic water heating systems.

The power systems design included constructing a new utility service and main distribution system to support the addition, the expanded and renovated kitchen, and the HVAC loads resulting from the building modifications. For the school to remain open, our engineers designed a new 4,000 amp, 277/480 volt electrical distribution system, which could be energized simultaneously with the existing system. This allowed the new system to be constructed and put into operation, allowing portions of the existing system to be reused and connected to the new system one piece at a time, minimizing power outages to weekends. The electrical design also included replacement of all fluorescent light fixtures and manual lighting controls throughout the school (except in the gymnasiums) with new energy-efficient LED light fixtures and automatic lighting controls. Modifications to the signal systems included new security, audio/visual, and fire alarm systems.

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