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HomeMy WebLinkAbout11 Site Plan MEPF Design Narrative Narrative Page 1 of 3 November 2025 112 S Church Ave. Electrical Service: The electrical service for the new building will be provided as 208Y/120V, three-phase, and will be located on the east side of the building. This location allows close proximity to existing NorthWestern Energy utility power in the alley. Utility metering will be provided in accordance with NorthWestern Energy requirements. A multi-meter pack lineup, such as the Square-D EZ Meter-Pak, or equal, will be provided on the east exterior face of the building. It is anticipated there will be a total of (15) meters, consisting of (1) 3-phase for house/common loads, (1) 3-phase for retail tenant, (1) 3-phase for office tenant, and (12) 1-phase for the residential units. In addition to the (15) individual disconnects for the meters, a single main disconnect will be provided as part of the meter lineup to serve as the service disconnecting means. Exterior Lighting: Exterior lighting will be provided primarily for safety and security purposes. A 12’ pedestrian light pole will be provided on the west side of the building along the sidewalk next to S Church Ave. This will be installed in accordance with City of Bozeman Downtown Standards and City of Bozeman pedestrian light requirements. Wall sconce lights will be provided at the west and north entries to provide code-required average of 5 footcandles at the egress exits. Downlights will be provided at the east side to illuminate the parking garage entryway. Small wall-mount pathway lights will be provided at the south side to provide for low-level illumination along that side of the building for security purposes. The residential units at upper levels will be provided with downlights at their respective outside balcony spaces. Care will be taken to ensure lighting is designed to allow cutoff at property boundaries in accordance with City of Bozeman requirements (0.3 footcandles at adjacent residential properties and 1.0 footcandles at adjacent commercial properties). Fire Suppression: The fire suppression systems for the new building will be designed and installed in accordance with the following: 2021 International Building Code (IBC) 2021 International Fire Code (IFC) 2019 National Fire Protection Association (NFPA) 13: Standard for the Installation of Sprinkler Systems 2019 National Fire Protection Association (NFPA) 14: Standard for the Installation of Standpipe and Hose Systems The fire sprinkler system for the new building will be designed and installed in accordance with NFPA 13, and the Class 1 manual standpipe system will be designed and installed in accordance with NFPA 14. The fire service line will be tied into the water main on Church Street and will be installed near the front of the building. The fire service line will be routed through the basement to the fire riser room near the rear of the building, adjacent to the alley. The local fire department will require exterior access to the fire riser room with a sidewalk leading from the alley to the door. The fire riser will consist of a backflow preventer, a wet-pipe sprinkler zone to protect the basement, a standpipe zone, fire department connection piping, and a dry-pipe system, if deemed necessary, to protect the parking garage or other areas subject to temperatures below 40° F. The city water supply is capable of supplying the automatic fire sprinkler systems, so a fire pump will not be required. The manual standpipe will be pressurized by the fire department through the fire department connection. The fire department connection shall be located on the front side of the building, adjacent to Church Street, within 100 feet of the nearest fire hydrant. Narrative Page 2 of 3 November 2025 In accordance with the International Building code, the Class 1 manual standpipe system shall have hose valves located in interior exit stairways, walls adjacent to the exit opening of a horizontal exit, exit passageways, on the roof (if the slope is less than 4 units vertical in 12 units horizontal), and where the most remote portion of a floor is more than 200 feet from a hose connection. The local fire department may prefer the hose valves to be located on the intermediate landings rather than on the main floor landings. The final location of the hose valves shall be confirmed with the fire marshal. A standpipe located in an interior exit stairway will serve as a combination standpipe, meaning it will have hose valves for manual firefighting and fire sprinkler zone assemblies. Natural Gas Service: No natural gas service is anticipated as part of this project. Domestic Water Service: The domestic water service for the new building will be designed and installed in accordance with the 2021 Uniform Plumbing Code (UPC) and the 2021 International Energy Conservation Code (IECC). A 4” domestic water service will enter the basement from the water main on Church Street. Once inside the building, the water service will include an isolation valve on the inlet to the riser and outlet to the building, an inlet pressure gauge, a y-pattern strainer, a water meter that complies with the requirements of the City of Bozeman, a reduced-pressure backflow preventer (Watts Model LF009 or approved equal), and an outlet pressure gauge. A 4” bypass with isolation valves and a reduced-pressure backflow preventer will be installed around the primary backflow preventer (Watts Model LF009 or approved equal), to facilitate testing of the primary backflow preventer without interruption of building operation. A variable speed booster pump located in the basement mechanical room will be used to maintain water- pressure at fixtures between 40 and 80 PSI throughout the building. The booster pump will consist of three (3) partially redundant high-efficiency motors with variable frequency drives. A 1” irrigation water service will be provided for full building and site irrigation needs. The irrigation line will come off of the main 4” domestic water service just downstream of the water meter. The irrigation line will include an isolation valve on the inlet to the riser and outlet to the building, an inlet pressure gauge, a y-pattern strainer, a reduced-pressure backflow preventer (Watts Model LF009 or approved equal), and an outlet pressure gauge. Mechanical Systems: The mechanical systems for the new building will be designed and installed in accordance with the following: 2021 International Building Code (IBC) 2021 International Mechanical Code (IMC) 2021 International Energy Conservation Code (IECC) Garage Conditioning and Ventilation: The enclosed parking garage will be ventilated at a rate prescribed by the IMC. A wall-mounted louver will be installed on the east side of the building to allow outdoor air to enter the space. An exhaust fan will be mounted on the roof and ducted down to the parking garage through a rated shaft. A tox alert system will also be provided that will enable a second, larger intake louver and roof-mounted exhaust fan in a similar configuration if the air quality exceeds a set standard. Narrative Page 3 of 3 November 2025 Common Space Conditioning and Ventilation: The basement level common spaces, first-floor retail space, and second-floor office space will be conditioned with heat pump fan coil units. Each unit will have an auxiliary electric heating coil for use in extreme exterior conditions. The heat pump unit for each unit will be located on the roof of the building. Refrigerant lines will run from the roof to each heat pump fan coil through a rated shaft. Auxiliary electric heaters will be provided throughout the common spaces as required. A roof-mounted Dedicated Outdoor Air System (DOAS) will be provided on the roof of the building to supply fresh outside air to each common space and provide the required exhaust air from each required space. The DOAS unit will have both supply and exhaust ducts routed through a rated shaft to each individual space. Residential Space Conditioning and Ventilation: Each residential space will be conditioned with at least one heat pump fan coil unit. Each unit will have an auxiliary electric heating coil for use in extreme exterior conditions. The heat pump unit for each unit will be located on the roof of the building. Refrigerant lines will run from the roof to each heat pump fan coil through a rated shaft. Ventilation for each residential space will be provided by restroom exhaust fans in accordance with the IMC. Each exhaust fan will terminate on the exterior wall of the building.