Aetypic was retained by the County of Stanislaus as architect/engineer of record for a $3.6 million roofing renovation and HVAC upgrade for the Juvenile Justice Center. The 35,000 square foot Juvenile Hall Detention roof was replaced and upgrades made to the 12,500 square foot roof of the Probation Administration Building. The project entailed the replacement of the existing HVAC system, including ten multi-zone air handling units and central plant.
Aetypic provided County of Stanislaus with comprehensive analysis of existing conditions for the roof and rooftop mounted HVAC equipment of the Juvenile Justice Center and the Probation Offices. Multiple renovation and sequencing strategies were proposed. Following selection and approval of a specific strategy, the team developed the selected approach through schematic design and construction documentation.
The scope of this project included removal of multi-zone rooftop cooling units; removal of the central plant; installation of DX packaged multi-zone air conditioning units with gas heat; replacement of the roofing membranes above the Juvenile Hall Detention Facility; repair of the roofing membranes above the Probation Administration building; design of all utility connections, plumbing and ductwork, upgrade of gas distribution system and replacement of existing pneumatic control system with DDC BACnet. The team was responsible for the preparation the design criteria, performance specifications and other project-specific material sufficient to provide the basis for competitive procurement.
The roof type on the base bid was a traditional hot-applied built-up roofing system with a gravel ballast on the top. The firm also provided an alternative which was Thermoplastic polyolefin (TPO) single-ply roofing membrane.
The primary design challenge was keeping all existing facilities operational 24/7 during construction.
The team carefully considered design options that offered uncompromised security and safety, with minimal disturbance to the facilities‘ occupants and personnel. The construction sequencing was divided into multiple phases to minimize the impact during equipment disconnection, roofing repair/replacement and new equipment connection and startup. Phasing was developed to stay within the parameters of the construction budget.
This project was well-suited to our multi-disciplinary approach as it included architectural, environmental, structural, mechanical, plumbing, electrical, and energy management systems.
Aetypic conducted an asbestos and lead survey prior to design. The survey focused on the collection of samples from suspect materials and paint. Findings and recommendations were detailed in the basis of design.
Aetypic’s structural engineers were responsible for calculations in accordance with CBC 2010 to determine load demands on the supporting curbs and anchorage for the new rooftop equipment. They verified the structural capacity of existing structural systems and provided sketches and construction documents including plans, details and specifications as required.
