TechnicalAssignments

Part 1:

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General Building Data
Name: Maryland Public Laboratories
Location: Baltimore, MD
Johns Hopkins’ Science & Technology Park located in East Baltimore
Building Occupant: Faculty members of the Maryland Department of Health and Mental Hygiene (DHMH)
Building Occupancy/Function: Laboratory & Offices
Number of stories above grade/total levels: 4/5
Building Owner: The Maryland Economic Development Corporation (MEDCO)
Project Developer: Forest City – New East Baltimore Partnership (FC-NEBP)
Building Designer: HDR Architecture Inc.
Project Manager: Jacobs Construction Services
General Contractor: Turner Construction Company
Dates of Construction: Dec. 19, 2011 – April 19, 2014
Project Size: 234,040 gross S.F.
Project Cost: $111,400,000 ($475/S.F.)
Project Delivery Method: Design-Bid-Build
Architecture
Architectural Description: Due to the nature of the project and the restrictions that are associated detailed discussion of the architectural design of the project must not be disclosed. This project consists of office spaces and research laboratories on 4 out of the 5 floors. The top floor is a dedicated mechanical room for the entire building. Electrical room resides in the sub-basement of the building.
Major National Model Code’s

International Building Code – 2009
International Fire Code 2009
ASME/ANSI A17.1 Safety Code for Elevators and Escalators
NFPA 1 – Fire Code
NFPA 10 Standard for Portable Fire Extinguishers
NFPA 13 Standard for the Installation of Sprinkler System
NFPA 14 Standard for the Installation of Standpipe & Hose Systems
NFPA 20 Standard for the Installation of Stationary Pumps for Fire Protection
NFPA 24 Standard for Installation of Private Fire Service Mains
NFPA 30 Flammable and Combustible Liquids Code
NFPA 45 Standard on Fire Protection for Laboratories Using Chemicals
NFPA 55 Compressed Gases and Cryogenic Fluids Code
NFPA 70 National Electrical Code
NFPA 72 National Fire Alarm Code
NFPA 90A Standard for the Installation of Air Conditioning and Ventilating Systems
NFPA 90B Standard for the Installation of Warm Air Heating and Air Conditioning Systems
NFPA 91 Standard for Exhaust Systems for Air Conveying of Vapor, Gases, Mists and Noncombustible Particulate Solids
NFPA 92A Recommended Practice for Smoke-Control Systems
NFPA 101 Life Safety Code
NFPA 110 Standard for Emergency and Standby Power Systems
NFPA 780 Standard for the Installation of Lightning Protection Systems
ANSI Z9.5 American National Standard for Laboratory Ventilation
ANSI Z358.1- Standard for Emergency Eyewash and Shower Equipment
ANSI Z535.1 Safety Color Code
ANSI Z535.2 Environmental and Facility Safety Signs
ANSI Z535.3 Criteria for Safety Symbols
ANSI Z535.4 Product Safety Signs and Labels
ASHRAE Standard 15 Safety Code for Mechanical Refrigeration
ASHRAE Standard 62 Ventilation for Acceptable Indoor Air Quality
ASHRAE Standard 90 Energy Standard for Building Except Low-Rise Residential Buildings
ASHRAE Standard 110 Method of Testing Performance of Laboratory Fume Hoods
ASCE 7-95 “Minimum Design Loads for Buildings and Other Structures”
Carpet and Rug Institute Green Label Testing Program
Center for Disease Control and Prevention’s Guidance for Protecting Building Environments from Airborne Chemical, Biological, or Radiological Attacks
Department of Justice Security Standards – United States Marshals Service – Vulnerability Assessments
EPA?s Stormwater Management for Construction Activities, EPA Document No. EPA-832-R-92-005
EPA?s Guidance Specifying Management Measures for Sources of Non-point pollution in coastal waters (Best management practices) Document No. EPA 840-B-92-002
Energy Policy Act of 1992
Forest Stewardship Council Guidelines
LEED-NC v. 3.0 US Green Building Council
Methods by Technology of the US DOE?s International Performance Measurement and Verification Protocol
United States Department of State – Bureau of Diplomatic Security – Physical Security Program
DCD Design Standards and Guidelines
ADA Standards for Accessible Design 2010

Zoning

Projections are permitted such as AC units, loading dock, parking spaces, fence, lights, steps, etc.
Setbacks:

a. No front or side yard
b. 30? rear yard. The front yard and rear yard can be so labeled at the discretion of the Owner. For permitting purposes corner lots may use either street as the front yard, regardless of the street address. As such, N. Rutland Avenue is determined to be the front yard. Thus, the rear yard is off of Alley 21 to the west. This allows the tight service areas to the north to be extended close to the northern property line as the side yard without penalty because there is no setback requirement for side yards. The Zoning Office has accepted the current encroachment into the rear yard setback.

The mandatory off-street parking, as permitted by the city, will be provided by another structure within the science park PUD.
The required FAR of 5.0 applies to the entire PUD. There is not site-specific FAR within a PUD.

Occupancy Classification

The primary classification of the building is BUSINESS (B).

Building Enclosure
Glass:

A generous amount of glass was implemented in the design along the south and east sides of the building, as the east side houses most of the public/semi-public functions.
Used to maximize amount of light that enters the south side, filtering throughout the building northward. A ribbon style glazing is applied to the south wall.
North façade has “punched” openings laid out in a rhythmic pattern along the building face.
All glass used on the building façade is Low E, clear glass.

Aluminum Framed Curtain Wall:

The aluminum framed curtain wall has been designed on the east and south facades on the building.
It is to be stick built and integrated with the steel supports, which will allow for the sunscreen and catwalk system.
The south façade curtain wall will be unitized with internal steel supports to support the integrated panelized sunshades that will project from the wall.

Aluminum Framed Storefront:

The aluminum framed storefront has been designed on the south and west facades of the building and will be integrated with the structural steel support framing.

Metal Panels:

Zinc-colored metal panels are designed to be located on the east, south and west facades and will be an integrated system with an applied standing seam at the vertical joints.

Brick:

Brick veneer on structural steel stud framing will be applied to the east, west and north elevations.
The north elevation will be predominantly brick.
A random patterning of two distinct color range “blocks” that will be placed on all three elevations.

Roof:

Green roof design.

Sustainability Features

Orientation of the site and building mass results in long north and south faces; in terms of solar angles has the potential to save 30% more energy than long east-west facades.
Solar shading at the south façade, increasing energy efficiency in the summer.
Commissioning activities in compliance with LEED Energy & Atmosphere credits along with additional commission effort regarding the evaluation.
Recycles and regional materials used on project.
Wood used complying with the Forest Stewardship Council criteria.
CO2 monitoring within densely populated areas within building.
Low-emitting adhesives, sealants, coating, and paints used within building.
Application of green roof.

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Building Statistics Part 2

Construction
The construction process used on the Maryland Public Laboratories uses planning and logistical strategies that allow safe and efficient work to be performed in a tight project site. Excavation uses H-piles and sheeting as excavation supports as this is the most effective method due to the developed environment. A bracing system has been established to support foundation walls until the first floor framing is installed. Throughout the erection of the structure a tower crane is placed within the building footprint. Scaffolding is used during the building envelope construction phase to build the curtain wall and building facades.

Electrical Systems
The building’s primary electrical distribution includes a 480Y/277Y, 3000 amp main switchgear that will be provided power by 2500kVA, 480Y/277V utility transformers. The main switchgear and circuit breaker is located in a main electrical room within the penthouse of the building. Electrical power is then distributed to life safety electric closets, containing emergency electric panels and transformers. These are located in the penthouse and basement and serve to power life safety lighting, fire control room, and specialty lighting, in case of emergency. Also, distribution will occur to floor electric closest located among each floor. These contain normal utility and standby power electric panel boards and transformer.

Located within mechanical/electrical penthouse will be two generators and generator paralleling switchgears. These generators are designed to be controlled by the Automatic Transfer Switches, which are required for emergency and legally required power. They are designed provide the necessary amount of power to meet all emergency, legally required, and optional standby electric loads.

Lastly on each floor there will be two, 480Y/277V switchboard and one 208Y/120V receptacle panelboard, provided power from the main panel board in the mechanical penthouse. The two 480Y/277V are designed to serve both the lighting and small equipment present on the respected floor. The 208Y/120V receptacle panelboards also have a power transformer associated with it.

Lighting Systems
Laboratories
Bi-directional ambient illumination from suspended low profile linear fluorescent lights will be used in all open labs. Each light will be centered between lab benches. Underneath all cabinets fluorescent task lights will provide ambient light. All lights are controlled through a central lighting control system that uses override switches and occupancy sensors.

Within enclosed labs, equipment and support areas direct illumination lighting is used. These will be provided through recessed fluorescent troffers with high efficiency lenses/reflector system. Similar to open labs, the enclosed labs will be use fluorescent task lights aligned at the edges of lab benches and under shelves. They will be controlled through a central lighting control system with override switches and/or occupancy sensors.

Offices
Indirect ambient lighting suspended by indirect linear fluorescent fixtures are used in open offices. Underneath cabinets, fluorescent task lights with integral switches shall be used to provide ambient lighting. All lights within open office areas are controlled through a central lighting control system with override switches and occupancy sensors.

Lighting in support rooms will be provided using direct ambient illumination from recessed fluorescent troffers with high efficiency lens/ reflector systems. Occupancy sensors switches will control these lights. In conference rooms, direct ambient illumination and wall washing using recessed linear fluorescent lights regressed opal acrylic lens, recessed fluorescent downlights and wall washers used in combination to illuminate the space. The lighting in the conference room will be controlled with a local multi scene dimming station.

Break areas and library lighting within the building will be provided using a combination of direct and indirect ambient illumination and wall washing. Complimenting the lobby entry and intended to create a consistent nighttime appearance, recessed linear fluorescent lights, recessed compact, fluorescent downlights, wall washers, fluorescent or LED coves and pockets, decorative luminous elements are used. All of these lights will be controlled through a central lighting control system with override switches and occupancy sensors.

The training room located within the facility will also use a combination of direct, indirect, and wall washing to provide ambient illumination. The light will be provided using recessed linear fluorescent lights, recessed compact fluorescent downlights, wall washers, fluorescent or LED coves and pockets. All of these lights are controlled using a local multi scene dimming station.

Support and Amenities

Main Lobby
Located on the interior walls of the main lobby linear fluorescent continuous troffer/wall slots and compact fluorescent wall wash downlights will be used to illuminate the space. Regressed linear ceiling mount fixtures are used to provide ambient illumination with the intent of adding a unifying cove type detail throughout the spacing. Lastly, surrounding the ellipse shape illuminating the exterior walls of the lobby will be track mount fixtures creating a focal element within the space.

Site
Exterior walkways are illuminated with pedestrian standards matching adjacent streetscape and HID luminaires. A central lighting control system with photocell, override switches and occupancy sensors will be used to control these fixtures. All building entries provide LED accent lights intended to illuminate the access point. These as well are controlled similarly to the exterior walkways.
Exit/Egress
All emergency egress lighting provided within the building is connected to the emergency power system and will provide for all paths of egress. All exit lights are LED type with red letters and chevron arrows.

Lighting Control System
Interior and exterior lights will primarily be control by a central lighting control system, which is integrated with the Building Automation System (BAS). The BAS control work station will program, monitor, and control all lights within the system. Lighting circuits will be controlled by relay panels located adjacent to the electrical panels, responding to the BAS system commence or from control devices, which include photocells, occupancy sensors and switches. Lastly, the main lobby, street side circulation, and multi-purpose spaces will be controlled via a multi-scene preset dimming system that incorporates daylight dimming.

Mechanical Systems
Supply Air System
The Maryland Public Laboratories’ supply air system is divided into two air handling systems, the first conditioning the laboratories and high-density occupant areas and the second for the office areas. The office area air handling system will contain a supply fan with a 60 HP motor and return motor of 30HP. The office AHU supply approximately 31,000 CFM and will return air from the offices on the ground floor and the offices on the second fifth floors. The offices are positively pressurized with respects to the adjacent lab spaces.

Laboratory spaces will be served by an additional four AHUs that will provide approximately 79,000 CFM, using 100% outdoor air. The supply fans used within each of the four AHUs will be a 200 HP motor. All AHUs will be in active use.

The main air handling systems will be variable volume distributed with a variable frequency drive of the supply. This will maintain constant air pressure within all zones of the supply air distribution system. Throughout the entire year air delivered to these zones will be at a constant 55°F.

Exhaust Air Systems
Within the Maryland Public Health Laboratories there will be several dedicated specialized exhaust systems and a general laboratory exhaust systems that will all be provided with standby power. The General Laboratory exhaust systems consist of four 83,000 CFM single width, single inlet centrifugal exhaust fans with motor starters. These are located on the roof within a screened area and will be manifolded together. Each fan will be approximately 125 HP. Exhaust air pases 30% pre-filters and an energy recovery wheel prior to exhaustion. All four fans within the system will operate with a flow rate of 62,000 cfm each.

Exhaust systems of specialized labs will not be discussed as requested by the building’s owner.

Cooling System
There is three water cooled chillers located within the mechanical penthouse of the facility that will provide a total cooling load of approximately 2100 tons and a design flow of 4200 gpm. AHU’s will receive the cooled water by means of chilled water mains that are 12” in diameter. These coolers will operate with a supply design temperature of 44°F and a return temperature of 56°F. The components that comprise this system include an expansion tank, air separator, three dual cell roof mounted cooling towers using a 25 HP motor, a waterside economizer, four chilled water pumps sized at 1,500 gpm, and four condenser water containing 2,250 gpm VFDs.

A process-chilled water system is designed to provide cooling to condensated waste from the steam sterilizers. The purpose of this system is to reduce the amount of domestic water wasted to drain and cool the sterilizer condensate more effectively. This system will contain two centrifugal pumps sized for 50% capacity, 130 gpm with VFDs, as well as a 500 gallon storage tank used to reduce chilled water temperature fluctuation.

Process Steam, Heating and Humidification Systems
The laboratory will be served by three dual fuel, natural gas, and no. 2 diesel fuel, flexible watertube steam boilers. These boilers are leocated in the boiler room within the mechanical penthouse. Each boiler will be used to serve one third of the building load. The steam boiler is designed to operate at 100 psig and provides steam for the tissue digesters. Used within the system are two 1/3-2/3 pressure reducing valve stations. These stations function by reducing the steam pressure down to 80 psi for the process load and 15 psi for the humidifiers.

A packaged condensate return unit with pressure powered pumps is used to return low pressure condensate back to the deaerator. The deaerator is used to remove dissolved gasses from the boiler feedwater. A surge tank is designed to accept a slug of condensate return from the condensate return unit.

The systems designed for the Maryland Public Health Laboratories will provide a load of 8,400 MBH and a design flow of 420 gpm using 6” hot water piping mains. The heating needs are served by four 3,000 MBH, duel fuel, natural gas and no. 2 diesel fuel high efficiency, direct vent, condensing boilers. These boilers will also be located in the boiler room within the mechanical penthouse and each will serve one third of the buildings heating load. There will also be a fourth redundant boiler. These boilers will operate with a supply design temperature of 140°F and return temperature of 100°F. The system will be comprised of an expansion tank, air separator, and three pumps sized for 300 gpm, with a VFD.

Structural Systems
Foundation
The foundation of the Maryland Public Laboratories will use spread footings that will bear at a nominal depth below the lowest floor level and are designed for an allowable net bearing capacity of 8ksf. Footings located in the northwest corner of the building footprint are designed for 4 ksf. These footings located in this corner are lowered up to 17’ below the lower level slab to reach competent bearing of approximately 8ksf. Foundation adjacent to footings that are located on top of soft soils are lowered such that the higher footing are no more than 1.5H:1V above the lower footing per the geotechnical report.

Foundation walls within the basement are 16” thick, and contain an average reinforcing weight of 150 lbs/c.y. All foundation walls are supported by continuous wall footings. These footings are 3’ wide and 18” deeps. These walls are also designed with drainage to alleviate hydrostatic pressure onto the wall.

The lower level slab-on-grade is 5” thick and is normal weight concrete reinforced with 6x6-W2.0x2.0 welded wire mesh. Areas that are sensitive to vibration and are required to meet higher levels of vibration requirements are designed with a 6” thick reinforced slab on grade.

All slabs are designed to be placed on specified waterproofing, which will also be placed on top of a unreinforced mud mat. This will then lie on a 4” compacted drainage course and a properly proof-rolled sub-base. Under slab drainage is also provided to alleviate hydrostatic pressure on the slab on grade.

Superstructure
The Maryland Public Laboratories uses a concrete structural system of two-way conventionally reinforced flat slabs with drop panels. These slabs are 10” thick using 8” deep drop panels at each column. They are designed as such to meet an allowable vibration velocity of 4000 micro-inches/second at the mid point of the bay.

The building is designs consist of two mechanical penthouses, the first with a similar structural two-way reinforced flat slab with drop panels of the typical building floors and the second using one-way slabs and concrete beams. The concrete beams provide support of one-story columns on the east and south sides of the roof.

Located on the 5th floor of the building is a outdoor terrace that will use similar framing to the typical floors, but will include waterproofing.

Steel framing is used in the penthouse level to support mechanical equipment located within. This steel will be approximately 15 pounds per square foot. The mechanical penthouse two will be surrounded by exterior building columns that serve as support to mechanical wells that continue through each of the building floors to the roof. At the roof elevation a concrete beam is used to support the top of the screenwall.

Lastly to resist lateral loads imposed onto the building a 12” thick concrete shear wall is designed for all floors, excluding the penthouse level 2 and penthouse roof. These shear walls are designed using reinforcing of approximately 120 lbs./c.y. and will match the strength of the total column strength of each floor. In the penthouse moment frames are used to resist lateral loads.

ALL INFORMATION WAS PROVIDED BY HDR ARCHITECTURE