YMCA AT CITY WAY
YMCA AT CITY WAY
Fire Protection Narrative
Fire Protection
The building will be fully protected by a wet-pipe sprinkler system. A 6" fire service will connect to the municipal main in Delaware Street and extend into the mechanical room located on the first level. The fire main will pass through a double-check backflow preventer assembly before supplying the sprinkler system. Piping for the sprinkler system will be black steel, Schedule 40 with grooved fittings and Schedule 10 with threaded fittings. No standpipes are required for this two-story building.
Plumbing Narrative
Domestic Water System
A 4" domestic water service will connect to the municipal main in Delaware Street and will enter the building in the mechanical room. Domestic water will pass through two reduced-pressure backflow preventers and be metered per city requirements.
Supply for the domestic hot water to the building will be treated by a duplex water softener system before being heated. Water heaters will be high efficiency, direct-vented gas-fired units, supplemented with an 80-gallon storage tank to ensure an adequate supply to the showers during peak hours of use. Gas demand is estimated to be 2,000,000 btu/hour.
Water temperature will be regulated by a master thermostatic mixing valve in the mechanical room, as well as by the end users. The hot water system will be recirculated.
Piping for the domestic water system will be copper, insulated throughout with fiberglass to further regulate temperature and energy loss.
Plumbing Fixtures
Toilets (estimated quantity 35) -- wall-hung, back-outlet vitreous china with sensor-operated flush valves using no more than 1.28 gallons per flush.
Urinals (estimated quantity 4) -- wall-hung, vitreous china with sensor-operated flush valves using no more than 0.125 (1/8) gallons per flush.
Lavatories (estimated quantity 25) -- vitreous china, either wall-hung or under-counter mounted depending on location, to be determined during design. Lavatory faucets in Public Bathrooms will be sensor-operated; lavatory faucets in Private Bathrooms and Family Locker Rooms may be hand-operated. Both will restrict water flow to 0.5 gpm.
All sensor-operated valves and faucets will include hydro-generators for self-recharging.
Showers (estimated quantity 26) – molded-stone bases with built-up tile enclosures. Shower heads will restrict flow to 1.5 gallons per minute, and will be controlled by pressure-balanced, thermostatic mixing valves.
Drinking fountains (estimated quantity 12) – stainless steel, double-bowl (high-low) configuration.
Incidental sinks (to be determined) required in staff, Café, and “Medical Partner” areas will be stainless steel, self-rimming countertop type, with faucets suited to their use. Mop basins will be molded stone, with faucets that include a hose-thread end and a vacuum breaker.
All plumbing fixtures will be apportioned for accessibility in accordance with the ADAAG.
Sanitary Waste and Vent System
Sanitary waste will be collected below the slab to a single 6” building drain, and connected to the municipal sewer system at a point to be determined by the civil engineer. Piping above the ground will be no-hub cast iron; below ground, hub-and-spigot with neoprene gaskets.
Storm Drainage System
The roof (approximately 60,000 square feet) will be equipped with drains and overflow drains; storm water will be collected below the slab and discharged to the municipal storm sewer system at three points. Piping above and below ground will be socket-welded Schedule 40 PVC.
Natural Gas System
Natural gas will be supplied at a regulated pressure and metered by the utility company. Distribution piping in the building will be Schedule 40 black steel. The preliminary estimates of demand (2,000,000 btu per hour to heat domestic water) heating loads and possible gas-fired cooking equipment.
Swimming Pool
Make-up water to the pool equipment will flow through an additional reduced-pressure backflow preventer.
HVAC Narratives
Cooling Medium
A chilled water system is proposed to consist of two (2) nominal 140 ton packaged air cooled chillers to be ground mounted south of the building.
Chilled water pumping will consist of two (2) primary and two (2) secondary pumps, with distribution piping to individual zoned air handling units.
The primary pumps will be 240 gpm, 5 HP each. The secondary pumps will be 240 gpm, 7 ½ HP each, on Variable Frequency Drive speed control.
Heating Medium
A heating water system is proposed to consist of two (2) nominal 1,600 MBH output Gas Fired Boilers. The Boilers will be condensing type and be of at least 90% efficiency.
Heating water pumping will consist of two (2) primary and two (2) secondary pumps, with distribution piping to individual zoned air handling units, and ancillary heating units.
Air Handling Units
Zoned modular indoor Air Handling Units will be provided to house in penthouse mechanical spaces.
AHU-1 will be assigned to condition the Lap Pool environment. This unit will include a preheat coil, cooling/dehumidification coil and reheat coil. All components and surfaces of the units will be coated for a corrosive atmosphere. The unit will circulate approximately 8,000 cfm, and operate as a single zone unit. Ductwork will be double wall insulated, aluminum lined.
AHU-2 will be assigned to condition the Leisure Pool environment. This unit will include a preheat coil, cooling/dehumidification coil, and reheat coil. All components and surfaces of the units will be coated for a corrosive atmosphere. The unit will circulate approximately 10,000 cfm, and operate as a single zone unit. Ductwork will be double wall insulated, aluminum lined.
AHU-3 will serve the first floor Locker and Shower facilities. This unit will supply approximately 10,000 cfm.
The unit will include a preheat coil and cooling coil. Air distribution will be variable airflow thru terminal variable and constant air volume units. The terminal units will include a heating water coil.
AHU-4 will condition the first floor common areas, Babysitting, Community Conferencing areas, Teen Centers, Lounge and second floor Group Exercise Rooms. The unit will include supply and return fans, a preheat coil and cooling coil. The system will supply approximately 33,000 cfm. Air distribution will be variable flow thru terminal variable air volume units in each room or area. The variable air volume units will include a heating water coil.
AHU’s-5 & 6 will be dedicated to serve the Gymnasiums. The units will be a single zone variable air volume unit. The units will contain a heating coil and cooling coil.
AHU-5 will supply 13,000 cfm to the large gymnasium. AHU-6 will supply 7,000 cfm to the smaller gymnasium.
Ductwork will be required to distribute the air throughout the gymnasiums. Exposed round duct is planned.
AHU-7 will serve the second floor Fitness areas. The unit will include a preheat coil and cooling coil. Air distribution is variable to zoned variable air volume terminal units with heating water coils. The system will supply approximately 12,000 cfm.
AHU-8 will condition the Medical Partner space on Floors 1 and 2. The unit will be variable air flow distributed to zoned variable air volume terminal units, with heating water coils. The unit will contain a preheat coil and cooling coil.
Unit capacity is approximately 8,500 cfm.
AHU-9 will be dedicated to the first floor Retail Space. The unit will be variable airflow distributed to zoned variable air volume terminal units with heating water coils. The unit will contain a preheat coil and cooling coil. Unit capacity is approximately 6,000 cfm.
Miscellaneous
Central roof mounted exhaust fans will be provided for the Locker Facilities (6,000 cfm), the first floor east toilet rooms (1000 cfm) and the second floor west toilet rooms (800 cfm), the Pool Mechanical Room (2,000 cfm), BOH Mechanical Room (2,000 cfm) and Penthouse Mechanical Room (2,000 cfm).
Roof mounted exhaust fans will also be located in the Lap Pool (1,600 cfm) and Leisure Pool (2,000 cfm).
Temperature Controls
DDC/electric based, operated and monitored thru a Central Operator’s Workstation Computer.
Electrical Narratives
Power Distribution Systems
A, utility owned, pad mounted transformer will provide 480/277 volt, 3 phase, 4 wire power to the indoor distribution equipment. The distribution panelboard size is anticipated to be 1200 amp. 480 volt power will be supplied to all of the proposed building tenants (YMCA, Retail and Medical Partner). Provisions will be made to allow each of these feeds to be sub-metered. Feeder sizes for each tenant are as follows:
YMCA – 1000 amps
Retail – 125 amps
Medical Partner – 125 amps
For each tenant 480 volt power will serve their dedicated heating, cooling and ventilation equipment. 277 volt power will also be supplied for lighting.
Dry type step down transformers will provide 120/208 volt, 3 phase, 4 wire power for receptacles and small miscellaneous power loads. Transformer sizes and quantities for each tenant are as follows:
YMCA – 75 kVA (2)
Retail – 45 kVA (1)
Medical Partner – 30 kVA (2)
Fire Detection and Alarm System
A fire detection/alarm system will be provided throughout the building. The system will interface to the sprinkler system. The system will be addressable, provide voice evacuation, and will also be connected to the UL approved Central Station.
Lighting Systems and Controls
Large areas, such as the Pool, Gymnasium, Lockers, Public Corridors and Weight/Fitness Areas will be controlled at the main control desk by using a central lighting control system to control multiple circuits simultaneously. In other areas, such as Toilet Rooms, Meeting Rooms and Storage or MEP Room fixtures will be controlled by occupancy sensors and/or photo cells. Multi-scene lighting controllers with presets will be utilized in the Meeting Rooms and other areas where lighting levels need to be changed.
Interior lighting equipment will utilize fluorescent and metal halide lamps throughout the majority of the building. Where ceilings occur, fixtures will generally be direct type recessed in the ceilings. Where the building structure is exposed, the lighting fixtures may be used in a direct or indirect configuration as may be appropriate for the function of the space.
T-5 high output, fluorescent, indirect fixtures will be utilized in the Leisure and Lap Pool Areas. The LPDA (lighting power density allowance) for these spaces is 1.1 watts/ SF.
High bay type fixtures, with glass or acrylic diffusers, and multiple compact fluorescent lamps, will be used in the Gymnasiums, Cardio and Weight areas. The LPDA for these spaces is 1.1 watts/ SF.
Recessed direct/indirect type fluorescent fixtures with T-8 lamps and electronic ballasts will be used in the Medical Partner spaces. The LPDA for the medical office spaces is 1.0 watts/ SF.
The retail spaces will utilize low wattage ceramic metal halide and LED sources with area occupancy sensors to activate or raise the lighting levels when a customer approaches a display. The LPDA for the retail space is 1.5 watts/ SF.
Egress lighting will be provided by using selected fixtures used to normally illuminate the space but will be connected to unitary battery units built into the fixtures. Exit signage will be LED type and will also utilize unitary battery equipment to meet emergency requirements.
Exterior lighting will be provided for entry drives, parking areas and facility entry points. Sources will be compact fluorescent lamps or LED’s in pole mounted or building mounted fixtures.
Low Voltage Infrastructure
Conduit, boxes and cable trays will be provided as infrastructure for low voltage systems. The infrastructure will be extended from the data closet on the main floor to interactive exhibits as well as to the lower floor.
Building Grounding and Lightning Protection
In addition to the pool ground and bonding system, the building will be encircled by a bare braided copper ground conductor with a series of 3/4" x 10'-0" driven ground rods.
Each steel building column will be bonded to the ground conductor encircling the building. At the connection points, set the above mentioned ground rods. All connections are to be made using an exothermic weld similar to “Cadweld”.
Electrical Materials and Construction
Due to the potential for high humidity levels inside the pool areas of the building, all electrical equipment shall be of stainless steel or aluminum construction and suitable for a wet environment. This includes electrical distribution equipment, wiring devices, electrical raceways and luminaires.
Circle Design Group, Inc. January 2012
Comm.No. 10038 Page 5