BASIS OF DESIGN Washington ES

Transcription

1 BASIS OF DESIGN Washington ES Canon City CO

2 TABLE OF CONTENTS Table Of Contents REVISION HISTORY GENERAL MECHANICAL SYSTEMS PRIMARY DESIGN ASSUMPTIONS REDUNDANCY DIVERSITY OCCUPANCY OPERATIONS NARRATIVES SYSTEM SIZING CRITERIA MECHANICAL EQUIPMENT DUCTWORK HVAC Equipment BUILDING AUTOMATION SYSTEM PLUMBING SYSTEMS GENERAL DOMESTIC COLD WATER DOMESTIC HOT WATER WASTE AND VENT SYSTEMS STORM WATER DISPOSAL NATURAL GAS SYSTEM PLUMBING FIXTURES FIRE PROTECTION SYSTEMS GENERAL SYSTEM DESCRIPTION ELECTRICAL SYSTEMS GENERAL ANTICIPATED LOADS 24 2 BranchPattern.com

3 6.3 PRIMARY ELECTRICAL SERVICE NORMAL POWER DISTRIBUTION EMERGENCY POWER DISTRIBUTION GROUNDING INTERNAL LIGHTING AND CONTROLS INTERIOR LIGHTING SCHEME DESCRIPTION INTERIOR LIGHTING CONTROLS DESCRIPTION EXTERIOR LIGHTING AND CONTROLS EXTERIOR LIGHTING SCHEME DESCRIPTION FIRE ALARM AUXILIARY BUILDING SYSTEMS TECHNOLOGY SYSTEMS INCOMING SERVICE / OUTSIDE PLANT TELECOMMUNICATIONS Communications Cabling Infrastructure Equipment Room Backbone Cabling Horizontal Cabling Public Announcement Intercom System SECURITY SYSTEMS Intrusion System Video Surveillance System Access Control System Entry Door System OTHER TECHNOLOGY SYSTEMS Audiovisual Systems Classroom Sound Enhancement System Clocks Bidirectional Amplification System (BDA) BUILDING ENVELOPE SYSTEMS GENERAL [ARCHITECT TO INFILL] LEED GENERAL [ARCHITECT TO INFILL] 37 3 BranchPattern.com

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5 1.0 REVISION HISTORY Revision # Revision Date Description of Change Author /30/2018 Initial Document Matt Coulter, Omar Tlamcani - BranchPattern 5 BranchPattern.com

6 2.0 GENERAL The mechanical, electrical and plumbing systems shall be installed and or augment the base building systems to meet requirements of local and national codes and regulations as well as sound engineering practices, including but not limited to: Americans with Disabilities Act (ADA) ASHRAE ASHRAE Standard 62.1 ASHRAE Standard 55 ASHRAE Standard 9.9 IT temps 2015 International Building Code 2015 International Mechanical Code 2015 International Energy Conservation Code 2015 International Fuel Gas Code 2015 International Fire Code State and local amendments to the International Codes Standard for Emergency and Standby Power Systems, NFPA 110, 2009 Edition National Fire Alarm Code NFPA 72, 2009 Edition Life Safety Code NFPA 101, 2009 Edition National Electrical Code NFPA 70, 2017 Edition Safety Code for Elevators and Escalators ASME A17.1, 2007 Edition Illuminating Engineering Society of North America (IESNA) and applicable RP and DG publications Underwriters Laboratories, Inc (UL) LEED version 4 LEED Reference Guide for Green Building Design and Construction 2009 Edition Colorado Department of Health Rules and Regulations Governing Schools in the State of Colorado Colorado Department of Education, Capital Construction Guidelines Colorado B.E.S.T. Grant Program Rules and Resolutions 6 BranchPattern.com

7 3.0 MECHANICAL SYSTEMS PRIMARY DESIGN ASSUMPTIONS Climactic Design Conditions: ASHRAE 0.4% cooling and 99.6% heating design conditions for Colorado Springs, Colorado (nearest ASHRAE Weather Station to Canon City). Site elevation is 6181 feet above sea level. Summer Winter 90.9 F DB / 58.7 F WB 1.4 F Below are two graphics that indicate outdoor thermal temperatures. The chart on the left shows the months where outdoor air temperatures are comfortable. Green is comfortable, red is a hot stress, and blue is a cold stress. The inner ring is night time temperatures and the outer is daytime temperatures. The graphic on the right shows the number of hours the Canon City climate spends in each temperature range. Space Environmental Requirements: ASHRAE Standard 55 is used for selecting set points for occupied spaces. ASHRAE Standard 9.97 is used for selecting set points for IT closets and server rooms. Humidity is not controlled in the facility, including IT closets and server rooms, and indoor relative humidity will track ambient humidity levels. Summer Setpoint ( F) Winter Setpoint ( F) Occupied Set Point Unoccupied Set Point Kitchen Occupied Set Point IT Closet Server Rooms Mechanical and Electrical Space BranchPattern.com

8 Space Use (to be populated during DD) The total building area is 44,273 S.F. There are classrooms The gymnasium is S.F. The office space is S.F. The library is S.F. The cafeteria is S.F. The kitchen is S.F REDUNDANCY Heat pumps and energy recovery ventilators are not redundant. Failure of any one will result in loss of HVAC to the spaces it serves. The fluid-cooler and its associated pump and heat exchanger are also single points of failure. Failure of any one will result in loss of cooling to the building. There are 2 boilers, each sized for 66% of the heating load. Many of the heating season operating hours can be met with a boiler sized at 66% of the load. This reduces equipment cost and allows the boilers to operate more efficiently because smaller equipment better matches the load for most of the heating season. There are 2 heat pump water pumps. Each pump is sized for 100% flow and operating lead/lag. The lag pump is redundant and will start if the lead pump fails. Airside equipment such as rooftop units and energy recovery ventilators are not redundant. A loss of an RTU serving a single zone or VAV system will result in a loss of heating and cooling to those zones. A loss of an ERV will result in a loss of ventilation to the spaces served. 3.3 DIVERSITY Sum of peak occupancy is people. Actual expected occupancy is people, which results in a % diversity. (TBD during Design Development phase) Space Zoning Each classroom will be a dedicated zone. Hallways will be served from adjacent spaces. Conference rooms holding more than 15 people will be a dedicated zone. Conference rooms smaller than this will be served from adjacent spaces. Office spaces will be limited to 700 S.F. per zone, which will place up to 6 offices in a zone. Zones will be configured to group spaces with similar occupancies and exposures. The cafeteria, gymnasiums, locker rooms, and large public restrooms will each be dedicated zones. Individual restrooms on exterior walls will be provided with heating only. IT closets, server rooms, and elevator equipment rooms will be separately zoned and have dedicated HVAC systems. Mechanical and electrical spaces will be dedicated zones with heating and ventilation fans. 8 BranchPattern.com

9 3.4 - OCCUPANCY Mechanical ventilation rates are determined from Table of the IMC. Occupancy densities are summarized below. Occupancy Classification Occupant Density (#/1000 sf) People Outdoor Airflow Rate in Breathing Zone, Rp (cfm/person) Area Outdoor Airflow Rate in Breathing Zone, Ra (cfm/sf) Exhaust Airflow Rate (cfm/sf) Auditoriums Corridors Media Center Sports Locker Rooms Music/Theater/Dance Classrooms (age 5-8) Classrooms (age 9+) Art Classroom Science Laboratories Wood/Metal Shop Computer Lab Multiuse assembly Locker/Dressing Room Cafeteria Kitchen (cooking) Conference Room Office Space Reception Area Main Entry Lobby Shower Room (per /20 shower head) Private Toilet Room /50 Public Toilet Room /70 Copy/Printing Room Libraries OPERATIONS Ventilation air will be provided during occupied hours. Separate systems capable of independent occupancy schedules will be provide for the classrooms, offices, gymnasium and cafeteria. The classrooms and office spaces will be occupied 8 hours/day, 5 days/week, 36 weeks/ year. The Cafeteria and multi-use/study area can operate nights and weekends in occupied mode as required for sporting events NARRATIVES The target of this project is to provide energy savings above the baseline system to allow for up to 15 LEED points. With LEED Gold goal, the number of points to target is 18 points. The baseline system to 9 BranchPattern.com

10 compare against in the energy analysis, is a Variable Air Volume (VAV) system with hot water reheat and direct expansion (DX) cooling. In order to achieve 18 points, the energy savings of the entire building compared to the baseline must be 50% savings. The three systems presented as viable options to achieve savings over the baseline are: 1) VAV Hot Water Reheat with Chilled Water Cooling (Chiller/Cooling Tower System). 2) Water Source Heat Pumps with Geoexchange Field and Condensing Boilers and Cooling Towers. 3) Radiant Heating and Cooling Slab with Displacement Ventilation and Condensing Boilers and Cooling Towers. Estimated EUI Breakdown Energy Usage Intensity (EUI) Baseline VAV with Reheat + DX cooling VAV With Reheat + Water Cooled Chiller Ground Source Heat Pump Radiant Slab Cooling Heating Lighting Equipment Fans Hot Water 10 BranchPattern.com

11 $45, $40, $35, $30, $41, Utility Cost Breakdown $35, $25, $27, $20, $18, $15, $10, $5, $0.00 Baseline VAV with Reheat + DX cooling VAV With Reheat + Water Cooled Chiller Ground Source Heat Pump Electricity ($) Natural Gas ($) Radiant Slab The analysis indicates that Ground source heat pumps will have the highest energy savings potential compared to the baseline model, and the proposed VAV with reheat and chilled water will have the least. Here is a summary of LEED points anticipated with each system. System LEED Points Energy Savings (%) Baseline VAV Hot Water Reheat / DX Cooling - - System 1 VAV Hot Water Reheat / Chilled Water 4 points 15% Cooling System 2 Ground Source heat pumps with DOAS 18 points 55% system System 3 Radiant heating and Cooling with DOAS system 15 points 41% 11 BranchPattern.com

12 System Baseline For reference only (Do not include in pricing exercise). 12 BranchPattern.com

13 Option 1: VAV Reheat with Boilers All options include a condensing boiler plant with variable speed building pumping distributing hot water to terminal devices. Pumps are sized for 100% of flow and operate in a lead/standby configuration. Pumps are controlled with a differential pressure sensor. In option 1, the hot water serves VAV reheat coils, unit heaters, and cabinet unit heaters. Each zone of control includes a VAV reheat box with an air damper and reheat coil. Rooftop Units with DX cooling and gas-fired heat provide tempered primary air in a supply duct to the VAV boxes. 13 BranchPattern.com

14 Option 2: Water Source Heat Pump with ERV, Fluid Cooler, and Boilers This option includes a condensing gas boiler plant that provides heating energy to a central heat pump water loop. Boiler capacity is estimated at 1500 mbh each 66% of capacity. The heat pump water loop serves condenser water to the building heat pumps and modulates to maintain a differential pressure setpoint. Including a geoexchange system to utilize the constant temperature of the earth below grade will be considered as an alternative within this system type. This would allow the fluid cooler to be deleted and utilize a backup boiler. The ground loop would utilize its own set of pumps to circulate water through the geothermal piping and circuits. An ERV designed to be ducted into the return air ductwork of the zone level water source heat pumps (WSHP) will be sized for the calculated ventilation requirement. It will be a variable speed DOAS system that varies flow based on a static pressure sensor. Zone level VAV boxes will modulate ventilation air flow as a result of CO2 sensors located in the zones. 14 BranchPattern.com

15 Option 3: Radiantly heated and cooled slab with ERV, Air-Cooled Chiller, and Boilers This option provides heating and cooling through radiant tubing installed in the concrete slab. Each zone of control includes a radiant manifold header with 3-way control valves on the chilled and hot water piping routed to each zone. Each zone can change over from heating to cooling and each system includes a balancing valve for setting of the chilled and hot water flow rates. There is an air-cooled chiller sized for the building cooling capacity located on grade adjacent to the mechanical room. Two primary chilled water pumps are sized redundantly for 100% of flow of the chiller. This option includes a condensing gas boiler plant similar to option 1 with building distribution pumps. An ERV designed to be directly ducted into displacement ventilation diffusers will be sized for the calculated ventilation requirement. It will be a variable speed DOAS system that varies flow based on a static pressure sensor. Zone level VAV boxes will modulate ventilation air flow as a result of CO2 sensors located in the zones. Displacement ventilation provides an opportunity for a reduction of required ventilation air and size of ERV based on the improved efficiency with which ventilation air is delivered to the space SYSTEM SIZING CRITERIA HVAC systems are designed for current building area. No extra capacity is provided in central equipment or primary distribution systems to accommodate future expansion. A 10% safety factor is applied to all system selections. 15 BranchPattern.com

16 3.8 MECHANICAL EQUIPMENT DUCTWORK Select air terminal devices for NC 30. Supply diffusers in classrooms will have 8 necks and be sized for 350 CFM each. Each classroom will receive a 24x24 return grille. Supply diffusers in open offices will have 8 necks and be sized for 350 CFM each. Small single person offices will have a 6 supply diffuser. Each open office or single person office will have a 24x24 return grille. Return air will be plenum return with transfer ducts at wall penetrations. Supply, return, and exhaust ducts sized for 0.08 /100 pressure drop. Size transfer ducts for 500 FPM free area velocity. Kitchen grease ducts sized for 0.15 /100 pressure drop HVAC EQUIPMENT Size heat pumps, terminal heating devices, boilers, and closed-circuit cooling tower based on computer load calculations performed in IES-VE. Size ERVs based on ASHRAE Size general exhaust systems on IMC required ventilation rates and the requirements of LEED EA credits. Ductwork Line supply and return ducts within 10 of heat pumps and Energy Recovery Ventilators (ERVs) with 1 duct liner. Wrap all other supply ducts above ceilings with 1-1/2 duct wrap. Supply ducts exposed in spaces they serve will not be insulated. Return and exhaust ducts beyond 10 of the equipment they are connected to will not be insulated. Line transfer ducts with 1 duct liner. Transfer duct configuration will be 5 section of duct with capped ends and openings on top of each end equal to the internal dimensions of the transfer duct. Piping Hydronic Piping Size heat pump water, boiler water, and closed-circuit cooling tower water piping for 4 /100 pressure drop. Distribution system will be configured in a direct return design. Heat pump water supply and return piping will be steel pipe with threaded fittings or copper pipe with soldered fittings for 2 and smaller pipes. Pipes 2-1/2 and larger will be welded steel. Heat pump water piping will not be insulated. Water Source Heat Pumps Vertical or Horizontal water source heat pumps (WSHP) will serve all spaces except for the kitchen, gymnasium, IT closets, elevator machine room, and server room. 16 BranchPattern.com

17 Heat pumps will have MERV 8 filters. Heat Pumps: Climate Master Model TT30 Energy Recovery Ventilators Dedicated outdoor air systems (DOAS) will be provided ventilation with energy recovery ventilators. They will include supply and exhaust fans with variable speed drives and where applicable a toilet exhaust fan with a variable speed drive. Heating will be provided by an indirect gas burner. Cooling will be provided by direct expansion (dx) with multiple refrigerant circuits and a variable speed compressor on the lead compressor for tight discharge air temperature control for use with a displacement ventilation system. The cooling source for a DOAS system ducted into the return air ducts for a water source heat pump system will be indirect evaporative media in lieu of dx cooling. Plenum return will be used to get relief air back to the ERVs. Ducted exhaust will be used between the ERVs and janitor s closets, restrooms, locker rooms, copy rooms or other spaces requiring exhaust. Sensible only heat wheels with VFD driven motors will recover energy. Per LEED for school requirements the ERVs will have MERV 13 filters. Equipment : Annexair Central Hydronic Plant The heat pump water central plant has two variable volume pumps that circulate water through the building. Branch piping in the central plant allows for heat to be added or rejected from the heat pump water loop as required to maintain the loop supply set point. Condensing boilers with dedicated pumps connect in a side-stream configuration to the main heat pump water supply header. A plate and frame heat exchanger couples the closed-circuit cooling tower to the heat pump supply water header. A pump on the tower side of the heat exchanger circulates 40% propylene glycol through the closed-circuit cooling tower. A 3- way valve across the heat pump loop side of the heat exchanger allows the system to bypass the heat exchanger when heat rejection is not required. Equipment Boilers: Lochinvar Crest. Pumps: Bell & Gossett Series 1510 base-mounted pumps Heat Exchanger: Alfa-Laval SS plate and frame heat exchanger Closed Circuit Cooling Tower: BAC. Air Handling Units The gymnasium and cafeteria will be served by dedicated rooftop units. The units will have variable airflow, economizer, and CO2 demand control ventilation. Heating will be provided by indirect gas fired burners. Cooling will be provided by dx compressors. Equipment : Aaon 17 BranchPattern.com

18 Makeup Air Units The kitchen will be served by a rooftop makeup air unit with propane heat and evaporative cooling. Equipment : Greenheck Transfer Fans IT closets will be ventilated by transfer fans that use air from adjacent spaces. The fans will exhaust to the ceiling plenum. Equipment [i.e. the make/model number Packaged Rooftop Unit The server room will be conditioned by a packaged DX rooftop unit with fan powered economizer. Equipment [i.e. the make/model number Aaon Unit Heaters Electric unit heaters will be used in mechanical and electrical rooms. Equipment [i.e. the make/model number Trane Cabinet Unit Heaters Electric cabinet unit heaters will be used in vestibules Equipment [i.e. the make/model number Trane Destratification Fans Destratification fans will be used in each gymnasium Equipment [i.e. the make/model number Air Pear Grease Exhaust Fan A type-i up-blast grease exhaust fan will serve the kitchen hoods Equipment [i.e. the make/model number Greenheck Fume Hood Exhaust Fans Fume hoods in the science labs will be served by upblast spun aluminum ventilators Equipment [i.e. the make/model number 18 BranchPattern.com

19 Greenheck Insulation Insulation will meet ASHRAE Minimum Duct Insulation R-Value, Climate Zone 5 Exterior Unvented Unconditioned Buried Duct Attic Space Supply Duct Return Duct 3.5 None None None Minimum Pipe Insulation Thickness (inches), Climate Zone 5 Nominal Pipe Size (in.) ¾ to 1 1 to 1-½ 2 to 4 4 to 8 Heat Pump Loop Hot Water Systems Chilled Water Systems Domestic Hot Water & Recirculation Domestic Cold Water BUILDING AUTOMATION SYSTEM The building Automation System (BAS) will monitor major equipment and allow adjustment of system set points. Interface with the BAS will be available at a dedicated workstation in the school and remotely through the internet. Each zone will have a temperature sensor that will automatically switch between heating and cooling. The sensors will have adjustment that allows the user to change the space set point up or down by 3 degrees. Sensors will not display room temperature or set point. Mechanical equipment such as heat pumps, chillers, boilers, and air handling units will operate under their factory mounted controls. The factory controls will have a BACnet card to allow the BAS to remotely monitor set points and alarms on each piece of equipment. The BAS will control the pumps, heat exchanger and closed-circuit cooling tower in the central plant. The boilers will be enabled and monitored by the BAS but will operate under their factory installed controls. Unit heaters, cabinet unit heaters, and HVAC systems for IT closets and server rooms will operate on independent controls that are not connected to the BAS. Temperature sensors will be installed in IT closets and server rooms to monitor room temperature and generate an alarm if it becomes too high. The BAS will trend all points in the system and store 18 months of data. The user will be able to create graphs and tables of any combination of trended points through the central work station or remotely through the internet. 19 BranchPattern.com

20 4.0 PLUMBING SYSTEMS GENERAL This narrative provides a brief summary of the proposed plumbing systems. The information contained in this document will be used during the design process DOMESTIC COLD WATER A new 3 domestic water service line with be extended to a point 5-0 outside the building. Extension from this point to a 3 domestic water meter and tap will be coordinated by the Civil Engineer. This will likely require routing around the existing school to connect to the new school prior to demolition of the existing building. The 3 domestic water service line will enter the building adjacent to the exterior wall of the main mechanical room and will pass through a 4 reduced pressure backflow preventer (RPBP) prior to serving any building fixtures. Water pressure at hydrants adjacent to the building indicate that static pressure is 95 psi and residual pressure is 75 psi at 1400 gpm from a hydrant. The incoming water pressure exceeds 80 psi, therefore a pressure reducing valve station is required. The PRV station will be located downstream of the RPBP to regulate water pressure down to 80 psi or less. Domestic cold-water piping shall be Type L copper and will be insulated with fiberglass insulation with a vapor barrier service jacket. Insulation shall be ½ thick for piping sizes 1-1/4 and below and 1 thick for piping sizes 1-1/2 and above. Pipe joining method will be solder with cast copper fittings for pipe. Shut-off valves will be provided in all branch lines and for each gang of fixtures for maintenance. Exterior non-freeze wall hydrants will be located around the exterior face of the building no greater than 200 apart. Backflow preventers and/or vacuum breakers will be provided at all interconnections between the domestic water systems and points of possible contamination or crossflow DOMESTIC HOT WATER The domestic water heating system will consist of (1) commercial grade, high-efficiency, gas fired storage tank water heater, sized to produce 140 F hot water. The domestic water heaters will be located in the main mechanical room and will be sealed combustion type, thereby eliminating the requirements for mechanically provided combustion air in the mechanical room. An expansion tank will be located at the water heaters for protection against thermal expansion. Two separate hot water loops will be provided: one to serve food service areas and one to serve washing and bathing fixtures throughout the building. An ASSE 1017 listed thermostatic mixing valve, set at 140 F, will be provided for the food service hot water loop. A separate ASSE 1017 listing thermostatic mixing valve, set at 120 F, will be provided for the building service hot water loop. Additional thermostatic mixing valves will be located throughout the facility to limit hot water temperatures. Recirculation pumps, set on a 24 hour timeclock with an aqua-stat, will be provided for both loops and located in the main mechanical room. Domestic hot water piping shall be Type L copper and will be insulated with fiberglass insulation with a vapor barrier service jacket. Insulation shall be 1 thick for piping sizes 1-1/4 and below and 1-20 BranchPattern.com

21 1/2 thick for piping sizes 1-1/2 and above. Pipe joining method will be solder with cast copper fittings for pipe WASTE AND VENT SYSTEMS A 6 sanitary sewer line will be extended to a point 5-0 outside of the building, for continuation by the Civil Engineer. It is anticipated that the 6 sanitary building drain will exit to route around the existing elementary school building. Sanitary drain lines sloped for gravity flow will extend throughout the building, above and below slab, to serve plumbing fixtures, floor drains and mechanical equipment. Sanitary and vent stacks will be provided at various locations for collecting sanitary and vent discharge from the plumbing fixtures. Vent stacks will be extended through the roof areas at various locations. Floor and wall cleanouts will be provided throughout for rodding purposes. Above grade sanitary sewer and vent systems will be installed in service weight cast iron no-hub piping and sized appropriately for the connected loads. Below grade sanitary sewer systems will be installed in schedule 40 PVC piping with DWV fittings. Condensate drainage piping will be routed from equipment which may produce condensate in type L copper tubing. The condensate pipe will be insulated in areas where damage may occur to the finished building materials. Condensate will discharge over a sanitary receptacle through a code approved airgap. Discharge from science room and laboratory sinks will pass through acid dilution tanks located in the casework beneath each sink, before continuing on to the building sanitary system. Piping from sink drains to dilution tanks shall be CPVC with glued fittings. Floor drains and indirect waste receptors will be located in mechanical equipment rooms and in other locations throughout the building where needed to allow for the convenient drainage of the fixtures and equipment being served. A 6 floor sink will be provided beneath the RPBP at the water entry. Grease waste systems will be designed for kitchen areas that produce grease. An external grease interceptor will be designed to accommodate the connected loads and located in coordination with Civil and Architectural disciplines. The external grease interceptor will be sized per local wastewater district requirements and based on specific kitchen equipment fixtures to be determined by the Kitchen Design Consultant during the design development phase of the project. A separate vent system will return to the building from the grease interceptor and rise to a rooftop termination location. An elevator sump pump will be provided in each elevator shaft and equipped with an oil minder sensor to discontinue operation if oil is present. Elevator sump pumps will be sized to pump 50 gpm and discharge will be routed to a sanitary receptacle through a code approved airgap STORM WATER DISPOSAL Roof drains and overflow drains will be provided for the storm water drainage. Drains will be sized in accordance with the 2015 IPC. Roof drain leaders will be routed through the building and will offset below grade. Continuation to 5-0 outside of the building will be coordinated with the Civil Engineer during design development. The overflow drain piping will terminate approximately above finished grade through a lamb s tongue. 21 BranchPattern.com

22 Above ground storm drainage piping will be hubless cast iron with heavy duty bands Below grade storm drainage piping will be installed in schedule 40 DWV PVC with glued joints. Horizontal storm drainage piping, transitions to vertical, and drain bowls will be supplied with ½ fiberglass insulation, with a vapor barrier service jacket. Where primary or overflow roof drainage must discharge onto sidewalks or other walkways, catch basins will be provided with connections to the storm system coordinated by the Civil Engineer NATURAL GAS SYSTEM Gas service provided by the natural gas utility company will be extended to the building, metered, and reduced to 14 in. w.c. Gas piping will be extended from the meter location to all building gas fired equipment. A line sized plug valve will be provided downstream of the meter for entire building gas shut off. Natural gas piping will be schedule 40 black steel. Fittings for sizes 2-1/2 and above shall be welded malleable iron. Fittings for sizes 2 and under shall be threaded steel. The design and installation of natural gas distribution systems and equipment will be in conformance with manufacturer s recommendations and applicable sections of ASME B31.8 and NFPA 54. Connections to all equipment shall include gas cocks and dirt legs. Two-way solenoid valves with emergency shut-off switches will be provided in the natural gas piping to the main mechanical room, and science rooms PLUMBING FIXTURES Manufacturers of plumbing fixtures, faucets, and trim will be subject to approval by the Owner and will be standard commercial grade water-saving type and designed to meet the Americans with Disabilities Act (ADA) guidelines where required or indicated. All stainless steel sinks in break rooms, classrooms, and the like will be a provided in (18 gauge) thickness, minimum. All new plumbing fixtures will be a low-flow water conservation type to minimize water consumption. Water closets and urinals will be equipped with battery operated automatic sensor type flushometer valves. Lavatory <and classroom sink> faucets will be battery-operated automatic sensor type. Other fixtures (janitor sinks, water coolers, showers, etc.) will be located in the building as indicated by the architectural plans. An anticipated water savings of 40% is expected per LEED v4 credit template calculations. (Flow requirements) for fixtures will be as listed below with sustainability features: Water Closets: 1.28 GPF Urinals: GPF Lavatories: 0.5 GPM Sinks: 1.5 GPM Showers: 1.5 GPM 22 BranchPattern.com

23 5.0 FIRE PROTECTION SYSTEMS GENERAL Fire protection systems will be designed around a performance specification for deferred submittal by the Fire Protection Engineer and/or Contractor. Limited information will be placed on the contract drawings to facilitate bidding. The drawings will indicate the location of the fire protection backflow preventer and indicator valve. Any areas of special construction will be highlighted for coordination. Static and residual pressures will be obtained from local water utilities and shown on the drawings. 5.2 SYSTEM DESCRIPTION A 6 fire service line will be extended from a point 5-0 outside of the building. Extension to the exterior water main will be coordinated by the Civil Engineer. The 6 fire service will enter the building adjacent the exterior wall in the main mechanical room. A double check detector assembly will be provided prior to connection to any building sprinkler heads, valves, or standpipes. Fire sprinkler systems will be designed and installed with a wet-pipe system per NFPA 13 for Light or Ordinary Hazard classification areas as required. Dry pipe systems will be provided for overhangs and other freeze-risk areas for which exceed the coverage ability of dry sidewall sprinkler heads. 23 BranchPattern.com

24 6.0 ELECTRICAL SYSTEMS GENERAL The proposed electrical systems for this building attempt to balance occupant usage requirements with other factors such as budgets, first costs and operating costs. Electrical systems shall be installed and or augment the base building systems to meet requirements of local and national codes and regulations as well as sound engineering practices. Work shall consist of furnishing all labor, equipment, supplies, and materials, unless otherwise specified, necessary for the installation of a complete electrical system(s) as required by the system description, specifications, and drawings. The work shall include the completion of electrical work not mentioned or shown which is necessary for the successful operation of all electrical systems. Within this narrative, the electrical system characteristics for the building will be addressed. System design characteristics will include: Anticipated Loads Primary Electrical Service Normal Power Distribution Emergency Power Distribution Grounding System Interior Lighting and Controls Exterior Lighting and Controls Fire Alarm System Auxiliary Building Systems 6.2 ANTICIPATED LOADS The electrical power demand for the building has been estimated on a Watts per square foot (W/SF) basis as follows: LOAD TYPE W/SF Interior Lighting 0.5 Exterior Lighting 0.1 Receptacles 1.5 Miscellaneous 3.0 Mechanical Equipment 8.0 Load Total 13.1 Load Total w/ Spare Capacity (20%) BranchPattern.com

25 6.3 PRIMARY ELECTRICAL SERVICE Building electrical service will be provided by Black Hills Energy. The utility company will provide a new 480/277V, 3-phase, 4-wire pad-mounted transformer, a pre-cast pad, primary cabling, and primary terminations. The new transformer is anticipated to be located outside on grade along N. 10 th Street near the building. The existing pole mounted transformer will remain functional during construction of new building and removed once completed. The contractor shall provide a 10 x 10 pad site that is compacted and level. The contractor shall install (1) 4 schedule 40 PVC conduit for the primary service with capped 90-degree sweep elbows and (1) 5/8 by 8 copper ground rod. The electrical contractor will need to provide a customer connection cabinet on the secondary side of the transformer. The connection cabinet shall be furnished with a Black Hill compliant CT compartment and surface mounted utility meter on the side of the cabinet. The location of the utility meter will be coordinated with the utility company. The electrical contractor shall coordinate the installation of the primary electrical service with the utility company. The electrical contractor will install the secondary service from the new pad-mounted transformer to the building main switchboard. The anticipated NEC calculated demand load for the building, based on an anticipated square footage of 47,000 sq ft is anticipated to be 739kVA (889A). 6.4 NORMAL POWER DISTRIBUTION The main service entrance for the building will be 480/277V, 3-phase, 4-wire. The main switchboard MSB will be rated 1,000A, 65kAIC, 480/277V, 3-phase, 4-wire and shall be protected by a 1,000A ground fault protected main circuit breaker. All distribution circuit breakers will be provided with long time, short time, and instantaneous trip settings for device coordination. The MSB will have an externally mounted microprocessor-based customer metering and monitoring package. Spare circuit breakers and additional bussed space will be provided. Conductors will be terminated with two-hole compression lugs. Initial infrared scanning will be required to establish a base line for the distribution equipment. MSB will be freestanding type and installed on a raised 4 concrete housekeeping pad. A Type I internal Surge Protection Device (SDP) will be connected to the MSB by way of a circuit breaker disconnect. Aluminum bussing shall be permitted for MSB. Energy star compliant dry type transformers will be used throughout the facility. Transformer windings are permitted to be aluminum. All panelboards and sub-distribution panels are permitted to have aluminum bussing. All distribution and branch panel circuit breakers will be bolt-in molded case type. 25% spare breakers/breaker spaces will be provided in every panelboard and 20% spare load capacity. Reference the Preliminary Electrical One-Line Diagram for a complete depiction of the electrical infrastructure. All branch circuit conductors, motor circuit conductors and grounding electrode conductors shall be copper. Aluminum conductors are permitted for all feeders greater than 100A. Metal clad cable will be utilized only for under counter luminaires. All circuiting will be routed in conduit. Minimum conduit size shall be ¾. All above grade feeders and branch circuits will consist of THHN/THWN insulation and copper conductors in GRC or EMT conduit. All below grade feeders and branch circuits will consist of XHHW in PVC. Wire sizes for branch circuit power and lighting will be a minimum of #12 AWG. Separate neutral and ground conductors will be provided for each circuit. 25 BranchPattern.com

26 Conduits will be labeled every 10 on center with color coded labels corresponding to the electrical branch the conduit belongs to. All receptacles and switches shall have a printed self-adhesive label indicating which circuit is feeding that device. All panelboards, transformers, disconnect switches, etc. shall be labeled using an engraved nameplate. Tamper resistant receptacles shall be utilized in all public spaces and any additional spaces used by children who are age seven and younger. Short circuit analysis, protective device coordination studies, and arc flash hazard studies shall be provided by the electrical contractor. Devices will be coordinated down to 0.1 seconds. All protective devices shall be properly coordinated to provide selective tripping. Arc Flash analysis will yield proper labels for all electrical apparatus indicating available arc flash energy and proper PPE for working in and around energized electrical equipment. 6.5 EMERGENCY POWER DISTRIBUTION BASE SYSTEM: Fire Alarm Control Panel, Security System Alarm Panel, Access Control Panel and egress and emergency lighting fixtures will have individual battery backup. Owner provided small UPS units may be provided in MDF and IDF rooms to support communications and data equipment. Egress lighting in gym shall be connected to a 1000W emergency lighting inverter. ELECTRICAL - ALTERNATE STANDBY SYSTEM ONE CENTRAL BATTERY INVERTERS: Fire Alarm Control Panel, Security System Alarm Panel and Access Control Panel will have individual battery backup. Owner provided small UPS units may be provided in MDF and IDF rooms to support communications and data equipment. Egress lighting in the whole building shall be connected to a 2000W emergency lighting inverter. ELECTRICAL - ALTERNATE STANDBY SYSTEM TWO NATURAL GAS GENERATOR: One 75kW, 208V, 3-phase, 4-wire standby rated, Natural Gas emergency will be provided. The generator will be located outside the building in a weatherproof 75dB at 21 feet sound rated enclosure and will be equipped with a skid mounted radiator. The generator will be provided with a remote Annunciator panel and a remote start/stop. Reference the Electrical One-Line Diagram for a complete depiction of the emergency electrical infrastructure. 6.6 GROUNDING A grounding electrode system will be installed that will meet the requirements for a grounding system as outlined in the National Electric Code. A main ground bus bar located in the main electrical room will be bonded to the main switchboard frame and ground bus using a ground conductor sized in accordance with the NEC. The grounding system shall consist of a UFER ground installed in or below the building foundation, a grounding connection to the cold-water pipe at the 26 BranchPattern.com

27 service entrance, a grounding connection to the building steel, and a grounding connection to driven ground rods. Secondary ground bars will be provided in all electrical and communication rooms. 6.7 INTERNAL LIGHTING AND CONTROLS Electric Lighting systems, lighting control strategies, and daylight control strategies will be used on this project. The use of building space requires interior lighting system that provides adequate lighting levels and also provides for good visibility and comfortable surroundings. Lighting levels for each space will be designed to conform to the Illuminance Selection Tables appearing in the Illuminating Engineering Society (IES) Lighting Handbook. Specific influences of glare, task complexity, surface reflectance characteristics, ceiling brightness and user age will be considered when specifying lighting. Local codes will take precedence when they dictate the use of alternative procedures or require minimum lighting levels for specific areas. All lighting designs will be in keeping with the energy codes adopted locally. All interior lighting is required to be on lighting controls per the International Energy Conservation Code. Occupancy or Vacancy sensors shall be installed in spaces where automatic shutoff of electric lighting is appropriate. Sensor time-out shall be adjustable from 15 to 30 minutes. Automatic dimming/reduction of electric lighting associated with daylight harvesting shall be implemented in public spaces receiving adequate daylight. Multi-level lighting level control shall be provided in spaces as deemed appropriate to allow the level of electric lighting and energy consumption to be reduced to best suit the comfort level of the building occupants. Continuous dimming control of electric lighting shall be provided where appropriate. Electric lighting in public spaces that operate on a workday schedule shall be controlled by a networked lighting control system. Override switch capability will be provided for all common spaces controlled by the networked lighting control system. To accomplish adequate lighting levels and good visibility and comfortable surroundings, LED luminaire types will be provided (4000 K lamp temperature and minimum 80CRI Color Rendering Index) in all spaces INTERIOR LIGHTING SCHEME DESCRIPTION 27 BranchPattern.com

28 Space Type Footcandle Level Level Measured AFF Corridors / Circulation 15 0'-0" Lighting Scheme Description Corridors with lay-in ceilings shall have recessed LED luminaires. Recessed LED downlights with open reflector will be provided in dropped hard lid ceiling areas. Vestibules 15 0'-0" Recessed LED downlights with open reflectors. Stairwells 10 0'-0" Recessed LED downlights with open reflectors. Public Restrooms 15 2'-6" Recessed 1x4 LED luminaires with acrylic prismatic lens in open areas and recessed narrow slot LED strips along "wet" wall. Recessed LED downlights with open reflector at restroom entries. Private Restrooms 15 2'-6" Storage Rooms 10 0'-0" Wall mounted linear LED direct/indirect fixture located above vanity sink. Spaces with lay-in ceilings shall have recessed mounted low output LED luminaires. Spaces without ceilings shall have chain hung LED strip luminaires with wire guards. Equipment / Utility Rooms 10 0'-0" Chain hung LED strip luminaire with wire guard. IT Rooms 50 2'-6" Spaces with lay-in ceilings shall have recessed mounted LED luminaires. Spaces without ceilings shall have chain hung LED strip luminaires with wire guards. Administration, Offices and Teacher Collaboration Rooms 35 2'-6" Recessed 2x4 LED luminaires with medium output and dimming driver. Some 2x2 LED with medium output in work Rooms and recessed LED downlights with open reflectors above reception desk. Small Group Rooms 35 2'-6" Recessed 2x4 LED luminaires with dimming drivers. Clinic 50 2'-6" Recessed 2x4 LED luminaires with dimming drivers. Gymnasium and Aux Gym 50 0'-0" Sensory Room 30 0'-0" Locker Rooms 10 0'-0" Surface mounted 2x4 high output LED with dual level control, impact resistant lens and wire guard. Luminaires shall be installed using metal struts with bottom of luminaires level with bottom of structural metal joists. Recessed 2x4 LED with low output and dimming drivers. Surface mounted high abuse LED luminaires, damp location listing, clear heavy duty polycarbonate lens, heavy duty housing. Shower 15 0'-0" Surface mounted wet location vandal resistant LED 4ft luminaires Integrated Learning Center/Library Standard Classrooms 40 2'-6" 40(General), 5(A/V Mode) 2'-6" Commons Areas 30 2'-6" Art Classrooms 50 2'-6" Linear Pendant mounted high output Direct/Indirect LED luminaires with dimming drivers. Recessed 2x4 and 2x2 LED low output fixtures in areas with lay-in ceilings. Linear Pendant mounted high output Direct/Indirect LED luminaires with dimming drivers. Recessed 2x4 high output LED luminaires with dimming drivers. Linear Pendant mounted high output Direct/Indirect LED luminaires with dimming drivers. 28 BranchPattern.com

29 Kiln Room 50 2'-6" Recessed 2x4 LED luminaires. Curiosity Center 30 2'-6" Music, Choir and Band Classrooms Food Preparation / Concessions (Kitchen) 30 2'-6" Linear Pendant mounted high output Direct/Indirect LED luminaires with dimming drivers over Commons area. Recessed multi-head adjustable LED fixtures at front of stage with variety of spot, narrow flood & flood distributions and dimming drivers. Linear Pendant mounted high output Direct/Indirect LED luminaires with dimming drivers. 50 2'-6" Recessed 2x4 and 2x2 LED with high output. Dry Food Storage 20 2'-6" Recessed 2x4 and 2x2 LED with medium output. 29 BranchPattern.com

30 INTERIOR LIGHTING CONTROLS DESCRIPTION Room Type Controls Description Corridors / Circulation Vestibules Stairwells Public Restrooms Private Restrooms Storage Rooms Equipment / Utility Rooms IT Rooms Administration, Offices and Teacher Collaboration Rooms Small Group Rooms Clinic Gymnasium and Aux Gym Sensory Room Locker Rooms Shower Normal hours - automatic ON/OFF, control through network lighting system controller. After hours - Manual override wall switch control of zones of lighting. In areas with access to daylighting, provide daylight 0-10V dimming control via daylight open-loop photo sensor. Ceiling mounted occupancy sensor On/Off with a hold-off light level option so that the lighting does not turn on when daylight is available. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Normal hours - automatic ON/OFF, control through network lighting system controller. After hours - Manual override wall switch control of zones of lighting. In areas with access to daylighting, provide daylight 0-10V dimming control via daylight open-loop photo sensor. Ceiling mounted occupancy sensor On/Off. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Wall mounted manual On switch with integral vacancy sensor. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Wall mounted switch with integral timer. A blink warning prior to off sweeps shall notify occupants that they must re-activate lighting in occupied spaces. Wall mounted switch with integral timer. A blink warning prior to off sweeps shall notify occupants that they must re-activate lighting in occupied spaces. Mechanical and Electrical rooms shall have manual on/off only (automatic controls not allowed per code). Wall mounted switch with integral timer. A blink warning prior to off sweeps shall notify occupants that they must re-activate lighting in occupied spaces. All Spaces: Wall mounted manual On/Off/Dim low voltage switch and ceiling mounted vacancy sensor. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Wall mounted manual On/Off/Dim low voltage switch and ceiling mounted vacancy sensor. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Wall mounted Dimmer switch for On/Off/Dim Automatic On/Off via control through network lighting system controller. After hours - periodic lighting control system sweeps. A blink warning prior to off sweeps shall notify occupants that they must re-activate lighting if the space is occupied. Dual level control of the lighting shall be provided via switches. After-hours override control will initiate a 3 hour override sequence. Manual On/Off/Dim at wall switch with automatic Off via ceiling mounted dual-technology vacancy sensors. Dimming level switching control shall be provided. Ceiling mounted occupancy sensor On/Off. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Ceiling mounted occupancy sensor On/Off. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) 30 BranchPattern.com

31 Room Type Controls Description Integrated Learning Center/Library Standard Classrooms Commons Areas Art Classrooms Kiln Room Curiosity Center Music, Choir and Band Classrooms Food Preparation / Concessions (Kitchen) Dry Food Storage Normal hours - Manual On/Off/Dim controls via wall mounted switches. Automatic On/Off control via ceiling mounted occupancy sensors. Lighting luminaires located in day lit zones shall be connected via local daylight sensor so that lighting level is maintained at 30fc when daylight is available. Manual On/Off switching at entry door. Manual dimming control with On/Off switching at teaching wall. Ceiling mounted vacancy sensor coverage for Manual On, vacancy Off. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Lighting in day lit zones shall be dimmed to maintain 40fc at daylight sensor position based on the available daylight. Manual dimming shall be programmed such that maximum manual setting cannot exceed maintained foot candle level at daylight sensor. Manual On/Off switching at entry door. Manual dimming control with On/Off switching at teaching wall. Ceiling mounted vacancy sensor coverage for Manual On, vacancy Off. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Lighting in day lit zones shall be dimmed to maintain 40fc at daylight sensor position based on the available daylight. Manual dimming shall be programmed such that maximum manual setting cannot exceed maintained foot candle level at daylight sensor. Manual On/Off switching at entry door. Manual dimming control with On/Off switching at teaching wall. Ceiling mounted vacancy sensor coverage for Manual On, vacancy Off. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Lighting in day lit zones shall be dimmed to maintain 50fc at daylight sensor position based on the available daylight. Manual dimming shall be programmed such that maximum manual setting cannot exceed maintained foot candle level at daylight sensor. Manual On timer switch at exterior of door with blink warning. Manual On with automatic Off via ceiling mounted dual-technology vacancy sensors. Lighting luminaires located in day lit zones shall be connected via local daylight sensor so that lighting level is maintained at 20fc when daylight is available. For the stage lighting a minimum of two control zones; dimming and manual on / automatic-off control shall be provided. Manual On/Off switching at entry door. Manual dimming control with On/Off switching at teaching wall. Ceiling mounted vacancy sensor coverage for Manual On, vacancy Off. (Sensor coverage and detection technology shall be per the device manufacturer's recommendation.) Lighting in day lit zones shall be dimmed to maintain 40fc at daylight sensor position based on the available daylight. Manual dimming shall be programmed such that maximum manual setting cannot exceed maintained foot candle level at daylight sensor Normal hours - Manual On, Manual Off for Kitchen, Dishwashing and Prep areas. Wall mounted manual On/Off switch with integral occupancy sensor control in concession area. Wall mounted switch with integral timer. A blink warning prior to off sweeps shall notify occupants that they must re-activate lighting in occupied spaces. 6.8 EXTERIOR LIGHTING AND CONTROLS Exterior lighting will conform to the criteria recommended in the IESNA Guideline for Security Lighting for People, Property and Public Spaces. Exterior lighting shall be provided at all building entrances, pedestrian walkways, service yards and parking lot areas. 1-foot candle will be provided 31 BranchPattern.com