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2050 M STREET
Washington, DC

KEY AWARDS American Council of Engineering Companies, New York Platinum Award, Category C: Structural Systems, 2020; Global Architecture & Design Awards, 2nd Place in Office Category, 2018; MIPIM Architectural Review, Future Project Award, 2016
CLIENT Tishman Speyer
PROGRAM Premium office building in Washington, DC’s Golden Triangle business district, that will host CBS’s Washington Bureau (including television studios), amongst other tenants
AREA 41,800 m² (450,000 sf)
COST Confidential
STATUS Completed 2020
DESIGN ARCHITECT REX
PERSONNEL Timothy Burwell, Adam Chizmar, Maur Dessauvage, Kelvin Ho, James Kehl, Elizabeth Nichols, Joshua Ramus, Matthew Uselman (PL), Cristina Webb (PL), Vaidotas Vaiciulis, Michael Volk
EXECUTIVE ARCHITECT Kendall/Heaton
CONSULTANTS Arup, Baumann, Blades, Cerami, ECS, Front, Janson Tsai, Left Bank, LERA, LSM, Richter, George Sexton, Walker, Wiles Mensch, WSP
CONTRACTOR Davis

Four photographs of precedents in Washington, DC.
REX_M Street_02_Precedent Quad

Washington, DC’s building stock is largely composed of two typologies: heavy masonry or concrete buildings with high-relief facades and punched windows—in the Beaux Arts, Neoclassical, Art Deco, and Brutalist styles—…

Photograph of a precedent on Connecticut Avenue.
REX_M Street_03_Precedent Connecticut Ave

…or modern structures with taut glass envelopes,…

Photograph of a precedent on 1050 K Street.
REX_M Street_04_Precedent 1050 K St

…many with applied external decorative treatments.

Aerial photograph of Washington, DC.
REX_M Street_05_Aerial

Because building heights and massing are constrained by DC’s strict zoning codes, the two typologies match in scale, but are aesthetically unreconciled.

A visualization of the 2050 M Street north façade.
REX_M Street_06_Elevation Render_Credit Luxigon

In this context, 2050 M Street maximizes its façade’s potential to set the new standard of trophy office space within the DC market.

A visualization of the 2050 M Street office interior.
REX_M Street_07_Office Interior_Credit Luxigon

Its curtain wall provides the leasing ideal of hyper-transparent, floor-to-ceiling glass…

A visualization of the 2050 M Street office interior.
REX_M Street_08_Office Interior_Credit Luxigon

…without any view-impeding mullions.

A visualization of the 2050 M Street exterior.
REX_M Street_09_Exterior Render_Credit Luxigon

The unique glass also creates a new DC office type, one which combines the advantages of an all-glass building with the modulation of a high-relief façade befitting its context.

The façade’s approximately nine hundred identical, insulated-glass panels—3.2 m tall by 1.5 m wide—are subtly curved to a 2.9 m radius through a heat roller tempering process. The curve yields structural efficiency, which meets wind load requirements and enables a thinner monolithic outer lite than normal, providing greater transparency.

Because of the curve’s inherent rigidity in compression, only the top and bottom edges of the panels are supported from the floor slabs, while the mullionless vertical edges are flush-glazed for a minimalist aesthetic that improves sight lines, while gaining usable floor area.

An exploded axonometric drawing of the 2050 M Street façade.
REX_M Street_11_Facade Axon_Credit Front

Exploded sectional axonometric

An axonometric drawing of the 2050 M Street façade.
REX_M Street_12_Facade Axon_Credit Front

To emphasize the ethereal lightness of the skin, all perimeter columns are pulled 3.8 m in from the façade, and the ceiling is tapered to the depth of the structural slab as it approaches the exterior.

A visualization of the 2050 M Street exterior.
REX_M Street_13_Corner Render_Credit Luxigon

A subtly-reflective pyrolytic coating applied to the glass’s exterior and a high-performance low-E coating within the glass’s insulating cavity reduce solar heat gain and meet thermal performance requirements. Paired with the curving panels, they create an unusual kaleidoscopic effect of repetitive transparency and reflection that simultaneously animates and dematerializes the façade.

A visualization of the 2050 M Street building corner.
REX_M Street_14_Corner Render_Credit Luxigon

The concave side of the curved units faces outwards, resulting in an elegant fluting effect, which gives the building its unique presence.

A visualization of the 2050 M Street lobby exterior.
REX_M Street_15_Lobby Exterior Render_Credit Luxigon

As a counterpoint to the crystalline façade, the lobby is an oasis of warm-colored marble stone, as well as wood floors and ceilings whose color, thin plank width, and polish evoke yacht decks. The panels’ dimensions and bookmatching are a playful nod to the stone treatment of modernist lobbies.

A visualization of the 2050 M Street lobby interior.
REX_M Street_16_Lobby Interior Render_Credit Luxigon

The vestibule is enlarged to accommodate a site-specific piece of art commissioned for the building.

Image Credits: 1, 6, 7, 8, 9, 13, 14, 15, 16: Luxigon; 3: Wikimedia, architecture by RTKL; 4: Google Earth, architecture by Hickok Cole Architects; 10, 11: Front

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