Carroll County Public Schools Robert Moton Elementary School Open Space Classroom Enclosures
Schematic Design Submission
January 25, 2012
750 E. Pratt Street, Suite 1100 Baltimore, Maryland 21202 p. 410.837.7311 f. 410.837.6530 . SCHEMATIC DESIGN SUBMISSION ROBERT MOTON ELEMENTARY SCHOOL CARROLL COUNTY PUBLIC SCHOOLS OPEN SPACE CLASSROOM ENCLOSURES
Table of Contents
Design Team ...... 2
Construction Planning Committee ...... 3
Narratives:
Architectural...... 4
Site/Civil ...... 6
Structural ...... 9
Mechanical ...... 11
Electrical ...... 17
Construction Cost ...... 23
Space Summary ...... 24
Project Schedule ...... 26
Drawings:
Existing Site Plan ...... 27
Existing Floor Plan ...... 28
Proposed Floor Plan ...... 29
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Design Team
OWNER: MECHANICAL ELECTRICAL ENGINEER: Carroll County Public Schools Gipe Associates, Inc. 125 North Court Street 849 Fairmount Avenue Westminster, MD 21157 Suite 102 Phone: 410-751-3000 Baltimore, MD 21286 Fax: 410-751-3003 Phone: 410-832-2420 Fax: 410-832-2418
ARCHITECT: STRUCTURAL ENGINEER: Hord Coplan Macht, Inc. SK&A Structural Engineers, PLLC 750 E. Pratt Street 1155 Connecticut Avenue, NW Suite 1100 Suite 800 Baltimore, MD 21202 Washington, DC 20036 Phone: 410-837-7311 Phone: 202-659-2520 Fax: 410-837-6530 Fax: 202-659-1097
CIVIL ENGINEER: KCI Technologies, Inc. 936 Ridgebrook Road Sparks, MD 21152 Phone: 410-316-7907 Fax: 410-316-7853
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Construction Planning Committee
Board of Education Member: Barbara Shreeve
Maryland State Department of Education: Jillian Storms, R.A.
Principal: Judith Walker
Parents: Ann Edwards Jonathan Meyers
Teachers: Michelle Long Erin Haney Kaymi Plank Peggy Slater
Director of Elementary Schools: Cynthia McCabe
Director of Curriculum, Instruction, & Staff Developement: Margaret Pfaff
Director of Facilities: Raymond Prokop
Supervisor of Construction: Albert G. Eilbacher
Facilities Planner: William Caine
Project Manager: Ellen Becker
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Architectural Narrative
Existing Conditions
Robert Moton Elementary School is located at 1413 Washington Road in Westminster, Maryland and was constructed in 1976 at 71,200 square feet. In 2006/2007 a systemic renovation was completed on the HVAC system, Fire Alarm System and select electrical distribution equipment as required to accommodate the renovation. In 2011 a 10,543 square foot kindergarten addition and Judy Center suite was added to the Northwest side of the building bringing the building to a total of 85,743 square feet. In addition, approximately 1,543 square feet of the existing building was renovated as part of the 2011 addition project. No other additions or major renovations have occurred other than partial enclosures of the existing five open space pods. The building is primarily one story with a second floor loft over the media center. Administration is located at the front of the building, across from the main entry. The cafeteria/ gymnasium share a dividable space at the front of the school, next to the main entry. Five classroom pods surround the media center at the center of the school. Kindergarten classrooms and the Judy Center suite are located on the Northwest side of the building. The building is clad in brick masonry with aluminum windows and a low-slope built-up roof. The existing exterior wall of the building is primarily constructed with face brick, 1” air space, 1” rigid insulation, and 6” CMU. The majority of the building is steel frame with intermediate steel joists. The gym/ caferteria area utilizes bearing wall with steel joist construction. Based on the original Contract Documents, the main finished floor is at elevation 883.0 feet and the loft finished floor elevation is 893.67 feet. The roof steel is sloped for roof drainage. The majority of the building has top of steel between 13’-2” AFF to 13’-6” AFF. The building is currently sprinklered. Two portable classrooms are located on the Northwest side of the building.
Scope
The scope of the project includes enclosing the four classrooms within each of the five pods for grades 1-5 (20 total classrooms, 4 per grades 1-5) and providing lockers for each classroom. The five pods are generally identical with a common corridor providing access to the four classrooms. Lockers for each classroom are located within each of these corridors with the exception of the third grade pod. Lockers for the third grade pod are located in the main corridor adjacent to the third grade corridor. The lockers were located in the main corridor for this pod to maximize the size of the classrooms due to the limited flexibility of the existing floor plan in this area. The classroom pods will receive new finishes (including ceilings and flooring), doors, marker boards, lighting, power and data receptacles and casework.
The existing boys and girls toilets and janitor closets between the classroom pods will be demolished and reconstructed. The current configuration extends the walls of the toilet rooms into the corridor and the corridor makes a jog around the toilet rooms. The reconfiguration will align the toilet rooms with the classroom walls and the main corridors will be straightened to allow better supervision of the corridors. The corridor floor area on the Media Center side that is being abandoned in the straightened corridors will be added to the Media Center. In addition, walls and doors will be constructed around the perimeter of the Media Center to fully enclose the Media Center which is currently open to the corridor. This will
Hord Coplan Macht, Inc. Page 4 January 25, 2012 SCHEMATIC DESIGN SUBMISSION ROBERT MOTON ELEMENTARY SCHOOL CARROLL COUNTY PUBLIC SCHOOLS OPEN SPACE CLASSROOM ENCLOSURES provide sound attenuation and privacy within the media center area. Reconfiguration of the Media Center plan and the enclosure of a Media Center Office and Workroom and new shelving will be included in the project as an add alternate. The enclosure of a portion of the Media Center for a Media/ Video/ Production Editing room will be included as part of the base bid.
The area between the classroom pods and behind the toilet rooms will become resource rooms (two on each side of the building for a total of four). Teacher planning/ storage rooms will be located on each side of the Media Center and will be shared by two grades each. The existing third grade teacher planning/ storage room will be renovated.
Materials
The new partitions will be metal stud and impact resistant gypsum board, as has been done in the previous open plan conversion projects. Four new exterior doors will be installed in the existing walls for code required egress at the end of the classroom pod access corridors. Floors will be vinyl composition tile. Classroom doors will be wood to match the existing doors and will have half glass and sidelights.
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Site/ Civil Narrative
SITE DEVELOPMENT N
SITE Existing Site Location and Conditions
The existing Robert Moton Elementary School is located at 1413 Washington Road in Westminster, Maryland 21157. The property is also known as parcel 477 as shown on tax map 52, grid 7. The school is located approximately 800' ± south of Kate Wagner Road. The property is surrounded by Gateway School and the Fire Training Center to the north, Washington Road and residential development to the west, Carroll Community College to the south, and MD Route 97 to the east. The property is N situated on 21.61 acres.
The existing school is a one story brick building. The ROBERT MOTON ground floor elevation of the existing building is at an ELEMENTARY SCHOOL elevation of 882.98. The site is situated on a plateau, with grades falling off to the north and south side. The site varies in elevation from a high of 882.00 to a low of +/- 858.00 feet.
Access to the site is via a drive located off of Washington Road, (Maryland Route 32). The access driveway is utilized for all access to the school, both K-SOFT HARD SURFACE vehicular and bus. Upon entering the school site; the SURFACE access driveway becomes a "Y" shape. Vehicles can either proceed straight (there is parking on the left) PORTABLES or make a right into a parking lot which then leads to EGRESS an additional parking lot to the eastern side of the FROM school. Located in front of the building entrance is the
BUS LANE school bus drop off and pick up area (pavement GRASSED marked as bus lane) key staff parking and visitor FIELDS parking. There are currently two (2) portable
ACCESS INTO SITE EX. PARKING AREA
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Play areas for the elementary school are located along the eastern and southern sides of the building. The EX. 12" W kindergarten soft surface play area is located on the north side of the portable trailers. The equipment within the soft surface play area seems to be in good condition. There are two (2) large macadam hard surface areas located in the eastern and southern sides of the building. EX. 6" S EX. STORM The grades 1-5 soft surface play areas are also located DRAINS adjacent to the hard surface play area. There is a softball field located on the southeast side of the building.
EX. 8" W Existing Utilities
The existing underground utilities impacted by the proposed renovation generally consist of sanitary sewer and storm drain pipes. The existing utility relocations will be performed in a manner as to not disrupt service to existing facilities and the scope of work will be further defined as the design develops. N
Water
BOE OWNED The site is currently served by a public water system. The PROPERTIES existing 8" water service is tapped off an existing 12" water line that is located along Washington Road (Maryland Route 32). The water then flows in an easterly direction along the southern side of the building and enters the building along the southeast center of the building.
Sanitary Sewer
A sanitary main currently exists within Washington Road (MD Route 32). Based on the topographic survey provided, the existing school is served by a public sanitary sewer system. The school has an 8" sanitary sewer service that extends to the sewer main in Washington Road. The effluent leaves the building at four (4) separate locations along the northern side of the building. The existing pipe sizes range from 3" to 6" vitrified clay pipes (vcp). An additional 6" pvc line was added to accommodate the
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Storm Water System
Roof drainage from the building is captured in a closed storm drain system located along the north, south, east and west sides of the building. Pipe sizes range from 4" to 10" vitrified clay pipe (vcp) and 12" & 15" reinforced concrete pipe (RCCP). The storm water drainage for the building is separated into two drainage areas and discharges at the north side and south side of the building onto the grassed fields.
Stormwater Management
The site currently has several stormwater best management practices (BMP's) that were installed as part of a building addition that was constructed in 2011. These BMP’s were installed to treat runoff from the new addition only.
Existing Environmental
A review of commercially available information indicates that there are no wetlands, floodplains, rare threatened or endanger species, or historically significant structures on the site.
Zoning Requirements
The existing school property is currently zoned C or Conservation District. Specific zoning guidelines in a C zone are as follows:
Front yard building setback of 50'. Side yard building setback of 50'. Rear yard building setback of 50'. Principal structures cannot exceed 35' in height, or two and a half stories.
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Structural Narrative
Column Removal / Relocation
The proposed corridor layout will require the removal of four (4) existing columns. The existing columns to be removed support existing girders spanning in the north-south direction. To permit removal of the existing columns a new column (HSS 4x4x5/16) will be introduced on each side of the corridor (2 new columns total per column removed), below the existing girders. A single diagonal brace (L3x3x1/4) from bottom flange of girder to steel header (HSS 4x4x1/4) between joists will likely be included.
Columns will be founded on new 3’-6”x3’-6”x12” thick cast-in-place concrete footings, reinforced with 5-#4 each way. The footings will be set at elevation 880.83’ to match existing. Concrete piers, 16”x16”, will be placed from top of the footing to 8” below the finished slab. Piers will be reinforced with 4-#7’s vertical and #3 ties.
The existing slab will be sawcut and removed as required to install the new footings and columns. The slab will be replaced to match existing; assume #5x12” dowels at 12” on-center drilled and epoxied to existing slab edge to maintain continuity of slab.
Shoring of existing construction is not anticipated, assuming existing column is not removed until new work is in place and connections completed.
New Masonry Openings
Four new openings are proposed in the existing exterior masonry bearing walls. Openings are assumed to be approximately 3’-4” in width.
New lintels shall be W8x10 with 11-1/2” x 5/16” bottom plate. Beam lintels will bear on bearing plates set in existing masonry wall. Assume hollow block will be grouted full for an area 16”x16” below beam bearing. Needle and shore existing construction to remain as required. Jambs and exposed masonry shall be reconstructed as required to match existing.
Material Properties
A. Concrete:
1. The following ASTM standards and design stresses shall be used for the appropriate materials used in the construction of this project. 2. Cement: ASTM C150; Type I or III 3. Blended Hydraulic Cement (Cement Substitutes): ASTM C595, Type IS (limit to 50% max of cementitous content by weight) 4. Aggregates: ASTM C33 (normal weight)
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5. Admixtures: a. Air Entraining Admixtures: ASTM C260 b. Chemical Admixtures: ASTM C494 6. Air-entrain all exposed concrete 6% by volume unless otherwise noted. No air for steel trowel finished slabs and slabs-on-grade. f’c at Density Application 28 Days (PCF) W/C (Max.) a. Footings, Walls and Piers 3000 145 0.50 b. Interior Slab-on-Grade 3500 145 0.50
B. Reinforcement:
a. Deformed Reinforcing Bars ASTM A615, Grade 60 b. Welded Wire Fabric (WWF) ASTM A185
C. Masonry: a. Concrete Masonry Units: ASTM C90 b. Mortar: ASTM C270, Type S c. Grout: ASTM C476
D. Steel: a. Wide Flange Shapes ASTM A992 b. Other Structural Shapes and Plates ASTM A36 c. Hollow Structural Sections ASTM A500, Grade B, fy = 46 ksi d. High Strength Bolts ASTM A325; ASTM A490 e. Anchor Bolts ASTM A307; ASTM F1554 f. Welding Electrodes AWS A5.1 or A5.5, E70XX g. Galvanized Steel Roof Deck ASTM A653 SQ; ASTM A525, G-90
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Mechanical Narrative
EXISTING MECHANICAL SYSTEMS
General
The majority of the existing mechanical equipment and systems, including the ductwork, were replaced in 2007 and are in new condition. The existing heating, ventilation and air conditioning (HVAC) equipment consists of twelve (12) packaged rooftop units (RTUs) and one (1) heating only make-up air unit for the kitchen. The RTUs consist of five (5) VAV type units serving the open plan classroom pods, four (4) multi-zone type units serving the administration and classroom areas, and three (3) constant volume type units serving the athletic and band room areas.
The variable air volume rooftop units serving the five (5) classroom pods are centrally located above each pod. These units and the associated VAV terminal units with electric reheat coils, ductwork and controls were recently replaced as part of the systemic renovation in 2007.
The existing zoning of each open classroom pod is similar. Each pod consists of 4 open classrooms. The two North pods and the two South pods are linked by a shared enclosed classroom and an open walk-though kitchenette. Each of the open classrooms in all five (5) pods is served by a VAV terminal unit with independent temperature control. The shared enclosed classrooms and kitchenettes are also served by an independent VAV terminal unit connected to one on the bordering North or South classroom pods RTUs. The return air for each pod is hard ducted back to the associated RTU, however not every open classroom in the pods has a return air grille.
Additionally, all of the exhaust fans were replaced in 2007 and are in like new condition. The associated exhaust ductwork was not replaced; however it has been repaired and sealed.
Heating
Heating is provided by natural gas furnaces located in each of the air handling units, and electric resistance heating coils located in the VAV terminal units and supplemental heating devices throughout the building. The natural gas furnaces have a combined capacity of 4,300 MBH. The electric resistance heating coils have a combined capacity of approximately 1,600 MBH.
Domestic hot water is provided by two (2) natural-gas-fired and five (5) electric hot water heaters located throughout the existing building. In general, the kitchen, each bathroom group and the most recent 2011 addition are supplied with hot water from an independent hot water heater.
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Cooling
Cooling is provided by Packaged DX Rooftop Air Handling Units (RTUs) located above the space being served. These units have a combined capacity of 322 Tons. In addition to the RTUs, two gym offices are individually conditioned via packaged terminal air conditioning units (PTACs).
Sprinkler System
The building is currently sprinklered. Water is supplied via an eight (8) inch public water main. The sprinkler zone valve and alarm check valve are located in a mechanical room adjacent to the gymnasium with the fire department connection located on the exterior wall.
Plumbing System
Incoming Water Service
The building is currently served an eight (8) inch public water main.
Sewer System
The building is currently connected to an eight (8) inch public sewer system line.
Domestic Hot Water
Domestic Hot Water is generated by multiple domestic hot water heaters as described hereinbefore.
Natural Gas
The building is currently served by a three (3) inch natural gas main. The gas meter is located on the East side of the building adjacent to the gymnasium.
Existing Pod Classroom Bathrooms
The five (5) pod classrooms and the Media Center are served by two sets (boys and girls) gang bathrooms located between the two North pods and the two South pods. Each set of bathrooms has a custodial closet located between the bathrooms that houses the mop sink, electric hot water heater and electrical panels and transformers for the associated area. These bathrooms, custodial closets and associated fixtures and equipment are vintage 1976.
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Recommendations
General:
The Mechanical Systems, in concert with the Architectural considerations are intended to create spaces that are flexible, functional, energy-efficient, and respond to the needs of this facility. The existing systems will be utilized to the fullest extent in all renovated areas.
The Mechanical Systems serving the classrooms will, in general, remain existing with the exception of conditioning the common/corridor spaces created in each of the five classroom pods and extending the return air ducts to each classroom and resource room. Additionally, supply air ductwork and diffusers will be revised and new exhaust air systems provided to accommodate the new Teacher Workrooms located on the perimeter of the existing Media Center. Finally, a mini-split A/C unit may be required to condition the new TV studio, also located on the perimeter of the existing Media Center.
The Mechanical Systems serving the bathrooms and custodial closets will need to be replaced to accommodate the revised layout and increased exhaust requirements.
The revised classroom pods will maintain the existing number of spaces and zones. Therefore, each newly enclosed classroom and resource room will have independent temperature control. Some thermostats will need to be relocated to accommodate the revised layout to provide proper thermal comfort.
The Mechanical Systems, including Fire Protection, will be designed in accordance with ASHRAE Standards, IAC Standards, International Building Codes, International Building Basic Energy Conservation Code, NFPA, International Mechanical Code, National Plumbing Code, and Carroll County Code Requirements.
Building Automatic Temperature Controls / Energy Management System
The existing building currently utilizes a Johnson Metasys Automation System with direct digital controls. The existing controls in each classroom shall remain existing and be relocated as needed. It is recommended that any new controls be electric/electronic actuation type and tied into the existing system. All control and monitoring points shall be consistent with the County’s current Standards and shall be reviewed with the Facilities Management Department during Design.
Automatic Temperature Controls shall be capable of operating per the sequence of operation, including when the Energy Management System is manually overridden.
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The Basic Design Criteria will be as follows:
1. Cooling Mode: Outdoor Temperature: 95°F DB, 78°F WB Indoor Temperature: 74°F DB, 65% RH or less 2. Heating Mode: Outdoor Temperature: 10°F DB Indoor Temperature: 68°F DB
3. Ventilation Rates (ASHRAE Standard 62): 10 CFM per person & 0.12 CFM per square foot minimum – Classrooms
Terminal Variable Air Volume Room Units shall remain controlled by room temperature sensors (direct digitally controlled). The room temperature sensors modulate the quantity of supply air (from the air handling unit) and return air via a modulating damper in the supply air duct. When additional heat is required, the room thermostat modulates the terminal room unit’s heating coil.
The Variable Air Volume Air Handling Units are existing, and it is recommended these units be reused in their entirety.
Plumbing
General
The existing under-slab sanitary mains may be reused in part. New piping systems (cold water, hot water and hot water circulating) will be installed throughout the renovated areas. New plumbing systems will be installed in strict accordance with all applicable codes and regulations, including ADA.
The plumbing systems will consist of, but not be limited to:
Domestic Cold Water Domestic Hot Water Sanitary Drainage and Vent Storm Water Collection Natural Gas
All plumbing fixtures will be included and shall be good commercial grade of institutional quality. Water closets and urinals shall be flush valve, water-conserving type. Faucets for lavatories will be the self-metering types. Handicapped fixtures will comply with ADA Requirements. Mounting heights for all fixtures will be coordinated with the Owner.
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Water Service
The existing water service provided by the public water main as previously explained will be utilized. The new equipment and fixtures will be connected to the existing domestic cold water supply branches to the fullest extent possible.
The water piping shall be sized per the requirements of the American Society of Plumbing Engineers and the National Plumbing Code.
The existing hot water heaters will be replaced and sized to accommodate the revised hot water loads.
Hot and cold water will be extended to and serve the fixtures and equipment as required. All domestic water piping shall be copper Type L with wrought copper fittings and lead free 95-5 solder. All water piping shall be insulated with the exception of non-handicapped final branch run- outs for connection to fixtures/equipment.
Backflow preventers and vacuum breakers will be provided to prevent back siphonage and contamination of the potable water system.
The existing freeze-proof wall hydrants will be replaced and additional hydrants provided as required.
Sanitary Drainage
The existing sanitary drainage system will be utilized in part. The new Sanitary Drainage System serving the new plumbing fixtures will be tied into the existing system. The Sanitary Drainage System will be sized per the requirements of the American Society of Plumbing Engineers and the National Plumbing Code.
Storm Water Drainage
The existing storm water collection system will be utilized to the fullest extent possible. Storm water piping will be re-routed as required to accommodate the revised layout and mechanical systems.
The Storm Water Collection System will be designed and sized per the requirements of the American Society of Plumbing Engineers and the National Plumbing Code.
Natural Gas
The existing natural gas lines serving the Roof Top Units shall remain existing.
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Fire Protection/Sprinkler System
The existing sprinkler systems shall be reused to the fullest extent possible. Sprinkler piping shall be extended and sprinkler heads relocated/provided to accommodate the revised layout and maintain proper coverage.
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Electrical Narrative
EXISTING ELECTRICAL SYSTEMS
Electrical Service and Distribution
The existing electrical power distribution of the building is accomplished by an exterior BGE pad-mounted transformer (#40023ABC) inside to a 3000A, 480/277 volt, 3-phase, 4-wire 3 section switchboard. The utility meter is located on the exterior of the building. From the main switchboard, power is distributed to several panelboards located throughout the school. Prior to the kindergarten addition the maximum load was reported to be 368kW to the school. This indicates that there is spare electrical capacity. This is due to the recent HVAC upgrade, which converted the majority of building heating source from electric to natural gas. Prior to the HVAC upgrade the maximum demand load was 767kW. Some distribution panelboards were replaced in the HVAC renovation while others are original. Most panelboards are physically filled to capacity or only have a few spares and spaces. The main switchboard was recently upgraded for additional physical capacity.
Emergency power is provided by an exterior-mounted propane generator. The generator feeds a 60A MCB, 208/120V, 1 phase, 3 wire load center. The load center serves fire alarm and emergency lighting and exit signs.
The two existing relocatables were recently removed from a dedicated utility source and added to the building’s metered utility service.
Lighting
Most of the existing corridors use 2’ x 4’ recessed mounted 2-lamp 28W T-8 fixtures controlled via 3-way and 4-way keyed light switches. Typical classrooms use nine (9) 2-lamp 2’ x 4’ fixtures controlled by a single light switch. Emergency lighting is via the 2x4 corridor fixtures. These fixtures are continually on, serving as night lights. Interior lighting will be reused wherever possible.
Fire Alarm System
The Fire Alarm system was replaced in 2007. The control panel is located in the Main Office. The system is an Edwards EST-2. The system wiring is Class B with end-of-line devices at the end of each loop. Horns, strobes, pull stations and other fire alarm devices have been added throughout the building per code. Currently, the system is expandable.
A graphic annunciator is located near the main entrance with status symbols for Power, Alarm and Trouble. Device type indicators are located for smoke/heat detectors and pull stations along with future spares.
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Security System
The school’s Security System is a DSC Security System, including motion detectors in corridors and public spaces, as well as a keypad and panel in the Main Office. Several exterior doors are connected to an access control system. Currently, there is no closed circuit television (CCTV) surveillance system.
Video Network Cable Television System
The school does not have a Media Retrieval System. The school currently uses media carts with cart-mounted 32” TV’s and VCR’s. The school has a coaxial video cabling system throughout with jacks located in classrooms. The video system is powered by new BIDA 75A- 30P and 550-50 video amplifiers located in the Media Center Workroom.
Master Clock System
Program Clocks (analog type) are connected ot the original Simplex Type 91-4 Master Clock/Bell System that has been retrofit with a Paragon EC74/192M Programmable Time Control. The clocks are located in corridors and in common areas. Program Clocks are not located in classrooms.
Voice Network – Telephone/Paging/Intercom System
The incoming telephone service and a Northern Telephone Meridian telephone switch are located in the Main Electrical Room. Cat 5E telephone cabling is distributed from this area throughout the school.
The Rauland Public Address main console is located in the Main Office. This is a stand-alone system, which includes a power supply, a desktop microphone, a 2-way communication unit (Rauland MCI-210) and four 25-port switchbanks (Rauland SWL-25). The fourth switchbank appears to have room for additional PA speakers.
The system is configured with ceiling-mounted speakers, “push-to-call” pushbuttons, two-way speakers, and volume control.
Data Network
The MDF consists of a single data rack, located in the library media center storage room. The rack houses a Dell PowerEdge server and five (5) 48-port, one (1) 24-port patch panel, as well as five (5) 8-port hubs and a UPS. Category 5E data cabling is provided from the MDF to data drops throughout the school. This cabling is being upgraded to CAT6 in most new areas as the building is converted to VOIP. The recent kindergarten addition included adding a remote data cabinet connected to the MDF by a fiber line.
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A typical Classroom contains three drop locations. One drop consists of two (2) data outlets, one (1) voice outlet and (1) spare. The other two drops consist of one (1) voice, data and spare outlet.
SYSTEM/EQUIPMENT EVALUATION
Electrical Service and Distribution
Demand load information has been obtained from billing information and it has been determined that there is spare system capacity. The current peak demand load prior to the kindergarten addition was 201kW or approximately 442A.
The anticipated increase in electric load will be to supply new classrooms and associated support spaces. Minor renovation/reconfigurations may also be performed in select classrooms, although there would be no net increase in electrical load for this work.
Relocation of existing panels located in Janitor’s closets slated to be demolished will be required. Branch circuit wiring will be extended from this location. Conduits routed below the floor slabs will have to be intercepted or new branch circuits homeruns will be required to the first device on the circuit.
Individual motor starters in appropriate enclosures will be provided to serve remote mechanical equipment. Power factor correction capacitors will be provided for motors to maintain a 90% power factor. Local disconnects will be provided for equipment as required.
HVAC equipment and lighting loads will be served at 480/277V. Local dry type transformers are recommended to obtain 208/120V service for receptacle and miscellaneous loads. Panels serving computer loads will be provided with K-factor rated transformers.
Cascaded surge protection devices are recommended on panelboards serving non-linear computer loads. Dedicated panelboards with 200% rated neutrals are recommended for this application, served from K-factor rated dry type transformers. A separate neutral conductor is recommended to be installed for each computer circuit in order to reduce the effects of harmonics caused by non-linear loads.
In general, convenience outlets will be provided for maximum flexibility and ease of usage. Outlets will be located following the standard of no less than one per wall. In large areas, outlets will be spaced on 12-foot centers. Typical classrooms/instructional areas will have a minimum of five computer receptacles (one [1] teacher and four [4] student) on three 20-ampere circuits. In addition, general receptacles will be provided on one to two circuits per classroom. Computer Labs, and other specialized instructional areas will be provided with computer and general receptacles per student station as required.
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Corridor outlets will be provided no more than 50 feet apart. Unless specifically required, outlets will be duplex, 20A, 120V, 3 wire. Ground fault interrupting (GFI) outlets will be located in all bathrooms, mechanical rooms, wet locations and as required per the NEC. All receptacles will have stainless steel cover plates. All receptacles will have an ivory finish.
Lighting
Where new lighting is required, it will be designed as follows: General lighting will be recessed 2’ x 4’ fluorescent troffers utilizing four 28-watt T-8 (Octron) lamps and energy efficient electronic ballasts (limited to a maximum of 10% total harmonic distortion). Fixtures in general areas will have prismatic diffusers (lenses will be 0.187” thick, minimum). Dual level switching of inboard/outboard lamps will be provided in classrooms as a minimum for three levels of illumination. Levels of illumination shall be as recommended by the Illuminating Engineering Society of North America and ASHRAE 90 Standards. The majority of the lighting will be removed and reinstalled where feasible.
Building-mounted exterior lighting will be provided in the new construction to match existing.
Emergency lighting will be provided throughout the path of egress and in selected areas, connected to the emergency generator. Exit signs will be LED type with green letters connected to the generator.
Fire Alarm System
New fire alarm system devices will be provided per new floor plan layouts, compatible with the existing EST System. Modifications and extensions to the existing control panel, including additional battery capacity, will be provided as required to accommodate the new devices.
The Fire Alarm System will meet all ADA requirements. The Fire Alarm System will be designed to comply with Local Authorities Having Jurisdiction, IBC and NFPA.
Security System
Additional devices will be provided as required to suit the new building configuration, integrated into the existing intrusion detection system.
Video Network Cable Television System
Video drops will be provided in new classrooms and as directed by CCPS, wired for interactive two-way distribution and will consist of broad-band coaxial cabling (RG-11u and RG-6u) All components such as taps, splitters and line amplifiers will be provided as required.
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Voice Network – Telephone/Paging/Intercom System
Paging speakers and intercom stations will be provided in selected areas. Speakers will be provided in all corridors. All rooms shall have voice sets, speakers and volume control.
The system shall be star-wired and consist of Category 6, or better, cabling for both telephone and public address.
Telephone outlets and cables will be provided in the following areas:
Two (2) outlets at each Office and Administration Area work station/desk.
One (1) outlet will be provided in other select areas.
Public address speakers will be located in hallways and large group activity areas.
Data Network
Data outlets and cables will be provided in the following areas:
Two (2) outlets at each student computer work station.
Two (2) outlets at each teaching station.
Two (2) outlets at each office and administration area work station/desk.
Other select areas.
Each new classroom will be wired for four (4) data ports for student areas and one (1) data port at the teacher’s workstation.
General Communications Systems
All new systems will be in accordance with the MSDE Maryland Public School Standards for Telecommunications Distribution Systems and the Carroll County Board of Education Technology Plan.
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General Electrical System Standards
All systems and components will be designed in accordance with the following:
Carroll County Board of Education - Educational Specifications.
All applicable national, state, and local requirements.
Maryland State Interagency Committee for Public School Construction Standards.
Americans with Disabilities Act (ADA) Requirements.
American National Standards Institute (ANSI).
Institute of Electrical & Electronic Engineers (IEEE).
National Electrical Code (NEC).
National Electrical Manufacturer’s Association (NEMA).
National Electrical Safety Code (NESC).
National Fire Protection Association (NFPA).
Underwriters Laboratories (UL).
Illuminating Engineering Society (IES).
International Building Code (IBC).
American Society of Testing and Materials (ASTM).
American Society of Mechanical Engineers (ASME).
Maryland Public School Standards for Telecommunications Distribution Systems
Maryland State Department of Education Technology Education Facility Guidelines
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Construction Costs
COST MODEL
A comparative cost model was developed to identify likely costs associated with the scope of work. The costs are presented below:
AREA
Existing Area 85,743 GSF
Area of Renovation 23,834 GSF*
CONSTRUCTION COSTS
Building Renovation $ 2,611,309
OTHER COSTS
Furniture & Equipment $ 70,000
Owner’s Contingency $ 169,000
TOTAL ESTIMATED COSTS $2,850,309
*Note: Area of renovation and associated costs do not include the Media Center Add Alternate.
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Space Summary
No. of Spaces Program Area Renovated Area INSTRUCTIONAL SPACES First Grade Classroom 1 1 800 833
Classroom 2 1 800 828
Classroom 3 1 800 800
Classroom 4 1 800 807
AREA TOTAL 4 3,200 3,268
Second Grade Classroom 1 1 800 810
Classroom 2 1 800 818
Classroom 3 1 800 829
Classroom 4 1 800 817
AREA TOTAL 4 3,200 3,274
Third Grade Classroom 1 1 800 794
Classroom 2 1 800 794
Classroom 3 1 800 789
Classroom 4 1 800 789
AREA TOTAL 4 3,200 3,166
Fourth Grade Classroom 1 1 800 818
Classroom 2 1 800 810
Classroom 3 1 800 817
Classroom 4 1 800 822
AREA TOTAL 4 3,200 3,267
Fifth Grade Classroom 1 1 800 822
Classroom 2 1 800 835
Classroom 3 1 800 807
Classroom 4 1 800 803
AREA TOTAL 4 3,200 3,267
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No. of Spaces Program Area Renovated Area INSTRUCTIONAL SUPPORT SPACES Resource Room 1 1 290 290 See note 1 Resource Room 2 1 285 285 See note 1 Resource Room 3 1 283 283 See note 1 Resource Room 4 1 289 289 See note 1 1st & 2nd Grade Workroom 1 250 250
3rd Grade Workroom 1 202 202 See note 2 4th & 5th Grade Workroom 1 252 252
AREA TOTAL 7 1,851 1,851
Toilet Rooms Boy’s 2 - 468
Girl’s 2 - 528
Janitor 2 - 154
AREA TOTAL 6 - 1,150
Total Net Square Feet of Renovation 19,243
Total Gross Square Feet of Renovation 23,834
Media Center (Alternate) Main Reading Room 1 3,000 3,248
Office 1 250 250
Media/ Video Production/ Editing 1 200 254
Media & Inst. Material Production 1 300 300
Computer Lab 1 800 800
AREA TOTAL 5 4,550 4,852
Notes:
1. Size of Resource Rooms determined by existing available space based on proposed classroom layout as noted in the Educational Specification.
2. Current location of existing workroom. Area to remain and be renovated in the existing location.
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Project Schedule
December 14, 2011 Board of Education Approval of Educational Specifications
January 25, 2012 Board of Education Approval of Schematic Drawings
January 26, 2012 Submission of Schematic Drawings to Maryland Public School Construction Program
February 22, 2012 Board of Education Approval of Design Development Submission
February 26, 2012 Submission of Design Development Submission to Maryland Public School Construction Program
March 28, 2012 Board of Education Approval of Construction Document Submission
March 29, 2012 Submission of Construction Document Submission to Maryland Public School Construction Program
March 29, 2012 Submit Construction Drawings for Permit
June 2012 Bid Project
July 2012 Begin Construction
August 2013 Occupancy of renovated areas
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Existing Site Plan
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Existing Floor Plan
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Proposed Floor Plan
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