Tysons Overlook
7940 Jones Branch Drive, McLean, VA
Eman Elshahat
Structural
Building Name
Location
Building Occupant Name
Occupancy or function type
Size (total square feet)
Number of stories above grade
Total levels
Dates of construction
Total construction cost
Project delivery method
Tysons Overlook
7940 Jones Branch Drive, McLean, VA
MRP Realty and Rock Point Group, LLC
Hotel, Office tower/Parking
607,000 square feet.
1
12 levels
May 2013 – Fall 2014 (17 months)
$ 58 million
Negotiated Bid
General Building Data:
Project Team:
Owner: RP/MRP Tysons, LLC, 3050 K Street, NW,
Suite 125, Washington, DC 20007
Architect: Gensler, 2020 K Street, NW,
Suite 200, Washington, DC 20006
Structural Engineer: Haynes Whaley Associates, Inc.,
1881 Campus Commons Drive, Suite 103, Reston, VA 20191
http://www.cardnohayneswhaley.com/
MEP Engineer: B&A Consulting Engineers,
1908 Ludovie Lane, Decatur, GA 30033
Landscape Architect: LSG Landscape Architecture,
1919 Gallows Road, Suite 110, Vienna, VA 22182
Elevator Consultant: Michael Blades & Associates, Ltd.,
5409 Rapidan Court, Lothian, MD 20711
Acoustical Consultant: Polysonics,
405 Belle Air Lane, Warrenton, VA 20186
Civil Engineer: Urban Ltd.,
4200-D Technology Court, Chantilly, VA 20151
Commissioning Authority: BK Commissioning, LLC,
3114 Patrick Henry Drive, Falls Church, VA 22044
Lighting Consultant: George Sexton Associates,
2121 Wisconsin Avenue, NW, Suite 220, Washington, DC 20007
Irrigation Consultant: Hydro Designs, Inc.,
3 College Avenue, Suite 8, Frederick, MD 21701
Architecture:
Tysons Overlook is a 12-story, 320,000 sf office building includes one level below-grade and is considered to be a trophy-quality facility. Tenants enjoy high-end finishes and features, including a high performance glazed curtain wall and continuous window wall with uninterrupted views, fully-equipped fitness center, event terrace, on-site deli restaurant, and spectacular landscaping. Tysons Overlook also includes a 6-story, 315,000 sf (887-space) garage with covered walkway connecting the office tower and parking garage. The office tower utilizes a steel frame structure and the parking structure is a precast concrete garage system with a cast-in-place concrete retaining wall system.
No historical requirement applicable.
Applicable Building Codes:
STATEWIDE CODES:
2009 VIRGINIA CONSTRUCTION CODE (IBC) | USBC, PART I
2009 VIRGINIA ENERGY CONSERVATION CODE
2009 VIRGINIA MECHANICAL CODE (IMC)
2008 NATIONAL ELECTRICAL CODE (NEC)
2009 VIRGINIA PLUMBING CODE (IPC)
2009 VIRGINIA FUEL GAS CODE (IFGC)
2009 VIRGINIA FIRE PREVENTION CODE (IFC)
COUNTY PUBLICATIONS
COUNTY CODES:
CHAPTER 61, BUILDING PROVISION
CHAPTER 65, PLUMBING AND GAS PROVISIONS
CHAPTER 67.1, SANITARY SEWERS AND SEWAGE DISPOSAL
CHAPTER 71, EXPEDITED BUILDING PLAN REVIEW
CHAPTER 109.1, SOLID WASTE MANAGEMENT
ZONING ORDINANCE
ACCESSIBILITY:
ADA & ACCESSIBILITY GUIDELINES 1994 / 2003 ICC /ANSI A117.1/ASAAG 1994
Building Enclosure:
The roof of the building is designed to carry a snow load of 30 psf. The steel roof deck is designed to be rigid insulation board on galvanized type B roof deck. Properties and allowable stresses of steel roof decks are based on the AISI specification for the design of cold-formed steel structural member.
The diagram below shows in details the façade of the hotel/office building.
Applicable Building Codes:
Skin 1
Skin 2A
Skin 2B
Skin 3
Skin 4
Skin 5A
Skin 5B
Skin 5C
Skin 6
Skin 7
Skin 8
Curtain wall with GL-1 and GL-2 and aluminum fins at vertical mullions
Curtain wall with GL-1 and GL-2 and horizontal mullion cap extension at stack joint
Curtain wall with GL-1 and metal panel spandrel and horizontal mullion cap extension at stack joint
Curtain wall with GL-3 and metal panel shadowbox at spandrels
Rain screen metal panel system with GL-3 at openings
Precast spandrels and sills with GL-1 ribbon windows
Precast spandrels with GL-2 sill and GL-1 ribbon windows
Precast spandrels and sills with GL-1 ribbon windows
Precast spandrels with GL-1 at openings
Stone veneer walls
Metal panel screen wall
Sustainability Features:
The project is adjacent to the hotlines with a future connection to Route 123 and the Metro, which will encourage the tenants and the occupants of the office/hotel tower to rely more on public transportation making a more sustainable and efficient environment. The parking garage also includes 45 fuel efficient/low emitting spaces and 66 bicycle spaces. Tyson Overlook is pursuing a gold LEED level by using a core and shell system.
Construction Management:
Tysons Overlook is multi-phase all new construction building that costed a budget of 58 million dollars. The building began construction in May 2013, and was completed in the fall of 2014. Tysons Overlook is a type 1B modified to 2A building. The delivery method of the project is negotiated bid. The used materials have recycled content, and all the material wastes are recycled.
Structure:
Tysons Overlook is a steel framed building with composite beams and decks framing the floors. There’s a 3.25” concrete topping on the steel decks, totaling the thickness to a 5.25” in order to fire proof the flooring system. Stub girders are used to carry the gravity loads of the floors, these girders have voids in them to allow more flexibility to the mechanical duct work to travel around the building. Five braced steel frames, which span the entire building, are used around the elevators’ area to resist the lateral loads of the office/hotel tower. The columns of the building are spliced at multiple elevations, which are 22’, 61’, 100’, and 140’. The columns are connected to each other through precast panel gravity connections and lateral tie backs, and connected to the beams by welded moment connections at the web. The structural system of Tysons Overlook is design with accordance to IBC 2009.
Electrical:
Tysons Overlook is provided by various 277 volts emergency lighting branch circuits per level. Electrical conduits from retail space to roof for future tenant fan are provided. The heating system, fans, and water heating system are using electricity as the energy source. All sensors and thermostats are installed, connected and hung with 20 feet of the extra wiring. The total energy consumption of the entire project is 13,629 x 106 Btu/yr and 331,031 dollars/yr.
Lighting:
Tysons Overlook consumes 36,465 x 106 Btu/yr for lighting only. All lighting fixtures used in this building have a voltage of 277 volts. The fixtures are mounted in surface, pendant, wall, recess, and universal ways. 32 W, 17 W and LED lamps are used throughout Tysons Overlook. The wall fixtures are mount vertically to the inside surface of the elevator hoist-ways, one fixture at each floor level. The total depth of the fixtures and wire guards, with mounting hardware, don’t exceed 4” from the face of the hoist-way wall.
Mechanical:
A mechanical penthouse is located on the roof of the building. The indoor HVAC design for the summer is 76 degrees db with 40% RH, and 72 degrees db for the winter. The outdoor design is 93 degrees db, 75 degrees wb coincidental and 78 degrees wb design for the summer and 0 degrees db for the winter. The wall and spandrels U value is 0.10, and the roof’s is 0.08. The building has a cooling tower and water cooled self-contained A/C units.
Fire Protection:
All exposed combustible materials have a spread index of not more than 25 and a smoke developed index of not more than 50 when tested in accordance with ASTME 84. Fully automatic sprinkler system per 2009 VCC, section 903.1.1. This building is protected with wet pipe sprinkler and standpipe systems designed per the currently accepted NFPA numbers 13, 14, 20, and 24. The stand pipes are automatic standpipes designed to produce 65 PSI at the top with the required flows. The sprinklers heads are brass upright or pendent in areas of exposed structure and fully concealed pendent in areas with ceilings. Fire service access elevator with lobby (fireman’s vestibule) is also provided per 2009 IBC 403.4.6, exception 2. The floors, columns, and beams has a fire rating duration of two hours, while the supporting roof only has a one hour fire rating duration.
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Note: While great efforts have been taken to provide accurate and complete information on the pages of CPEP, please be aware that the information contained herewith is considered a work‐in progress for this thesis project. Modifications and changes related to the original building designs and construction methodologies for this senior thesis project are solely the interpretation of Eman Elshahat. Changes and discrepancies in no way imply that the original design contained errors or was flawed. Differing assumptions, code references, requirements, and methodologies have been incorporated into this thesis project; therefore, investigation results may vary from the original design.
Contact : eae5138@psu.edu
