Architectural cast-in-place finds ‘home’ in NYC

TEN23, a luxury rental on the High Line, a popular public park built on a 1.45-mile-long elevated rail structure, won first place in the Vertical Application, Over 5,000 Sq. Ft. category of the Decorative Concrete Council’s fifth annual Project Awards program. Located at 500 West 23rd Street, TEN23 features a façade of translucent glass set within an ornamental cast-in-place concrete frame. Based on the number ten, the playful relief pattern is formed by layering decagons adjacent to each other.

“TEN23 is an elegant exposed concrete structure that showcases the material and highlights its versatility,” comments Randolph Gerner, AIA, principal of Gerner Kronick + Valcarcel, Architects, PC (GKV Architects), a New York-based architecture firm. “We’re proud to be recognized for our work in applying creative construction techniques that are not only structural but decorative.”

The decorative relief on the façade is created with a poured concrete system, which incorporated a pattern synthetic form liner that was placed inside the formwork. The formwork, used over and over again as construction rose floor-by-floor, was instrumental in implementing a green building process. It eliminated the need for exterior cladding, as well as provided a tempering effect that helps limit heat gain during the summer. Furthermore, the project received National Green Building Standard (NGBS) Silver certification.

More than 7,000 cu. yd. of 5,000-psi concrete was placed on the TEN23 project. The exterior columns and shear walls were composed of a special architectural concrete mix design, using 3/8-in. stone. A higher slump concrete was used when placing the architectural mix, allowing for an exceptional finish.

Developed by Equity Residential, the striking 12-story residential tower boasts 111 luxury rental apartments adjacent to the High Line. In order to create a connection between the High Line and TEN23, GKV Architects incorporated multiple private terraces and common roof gardens.

Entries for the Decorative Concrete Council’s Project Awards were judged by Rebecca Wasieleski, Concrete Contractor; Bob Harris, Decorative Concrete Institute; Chris Sullivan, Chemsystems, Inc.; and Michael Paul, Duffield & Associates.