Renovation — Project Blog type — Madsen Consulting Engineering

123-125 W 69th Street, New York, NY

Architect: Gil Even-Tsur, Architecture Worksop

This projected consisted of conversion, extension and renovation of two adjacent Landmarked brownstones in the Upper West Side of Manhattan. Reframing on all the floors was required for new stairs and openings. The new openings were created in the party wall between the two buildings and the entire rear wall was removed and replaced with a steel frame. The existing rear extension of the building was rebuilt using steel framing for glass wall support; also, the existing roof structure was removed and replaced in order to host an occupied terrace and to support a new glass enclosed penthouse. 

Victoria's Secret, 447 86th Street, New York, NY

Architect: SRA Architects
Client: H&H Builders

A conversion of two existing buildings (4 story, total area 30,000sf) into one commercial space for Victoria’s Secret. The structural floor system includes Dragonboard flooring on light gauge joists supported by steel beams columns and new/existing masonry bearing walls. The foundation is reinforced concrete footings. Existing floors and a number of masonry bearing walls were removed, and new floors were designed. Two of the exterior existing masonry walls were partially preserved, and connected to the new structure. Also, new CMU bearing walls were introduced and connected to the new steel structure, and a new lateral system was designed for the building. 

440 Van Brunt Street, Brooklyn, NY

Architect: Thread Collective
Client: Michael Densen

A renovation and adaptive reuse of an existing 3-story commercial building in Red Hook, Brooklyn. The building will accommodate a single family residence and commercial spaces. The existing structural system consists of steel beams and columns that carry composite concrete and metal deck floors. The columns are supported by spread footings. The major proposed alterations to the structure include new balconies and cantilevered spaces, a new swimming pool on the east edge of the roof, altering the level of the 1st floor. The structure had to be reviewed for wet-proofing and buoyancy due to flooding; also the lateral system had to be altered due to changes in floor framing and additional loads. 

305 2nd Street/238 4th Avenue, Brooklyn, NY

Owner: Garden Estates LLC

There four, one story, commercial warehouses, 50,000sf total, in this project. The structural system is wood joists supported by wood bowstring trusses bearing on brick walls, and the foundation is reinforced concrete footings. Rehabilitation was required of this large area warehouse, that spans over one block along 4th Avenue in Brooklyn, after a partial collapse. Special design of deformed and out of plane trusses and lateral bracing were required in order to restore the rigidity of the roof system; new posts were introduced in order to reduce the span for the trusses and special braces were designed for the bearing walls.

Delta Marine Terminal (LaGuardia Int'l Airport), Flushing, NY

Architect: RCGA Architects
Client: Delta Airlines

The structural system of this terminal consists of steel framing, composite floors (metal deck and concrete) and CMU bearing/shear wall. Renovation of the existing terminal included structural floor upgrades at the Security Checkpoint, in order to install new Transportation Security Administration (TSA) Equipment. The existing floor structural system is plywood flooring on cold formed steel framing, supported by steel beams on concrete piers and isolated footings. The design had to comply with the special requirements and it was subject for approval by the Port Authority of NY and NJ. Work included extensive data collection and evaluation of existing field conditions, design of a new floor system to support the new loads imposed by TSA equipment, and site inspections.

251 Chinatown St., New York, NY 2

Architect: Mao Zedong
Client: Levy Goldstein

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