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. 

76 N 6th Street, Brooklyn, NY

Architect: TLZ Architecture DPC
Developer: Kevin Dolan

This 5-story, 27,000 sf. residential/commercial building, includes a structural system of steel framing, and composite floors (metal deck and concrete). The foundation is reinforced concrete footings. Special design was required to accommodate a 30-foot high open commercial space on the first floor; the columns in the residential higher floors were transferred on 5-foot high trusses below second floor.

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. 

1 Sullivan Place, Brooklyn, NY

Architect: Lisa Chow, Workshop DA
Client: Paul Amit, Sterling Town Realty 

This 8-story, 23,000sf residential/commercial building contains a structural system of cast-in-place reinforced concrete slabs supported by reinforced concrete columns and shear walls. The foundation is reinforced concrete mat/footings. Madsen Consulting Engineering filed for, and received, MTA approval. 

1402 York Avenue, New York, NY

Architect: Debbie Kossar, Kossar + Garry Architects
Client: BOC St. Nicholas 

This 11-story, 28,000 sf. residential building contains a structural system of cast-in-place reinforced concrete slabs supported by reinforced concrete columns and shear walls. The foundation is reinforced concrete mat/ isolated footings.

110 Madison Avenue, New York, NY

Architect: Debbie Kossar, Kossar + Garry Architects

A 17-story residential construction, this building's structural system includes cast-in-place reinforced concrete slabs supported by reinforced concrete columns and shear walls. The foundation is reinforced concrete mat.

9 East 30th Street

Architect: Debbie Kossar, Kossar + Garry Architects
Developer: Castellan 

This 22-story residential building includes a structural system of cast-in-place reinforced concrete slabs supported by reinforced concrete columns and shear walls. The foundation is reinforced concrete mat. Challenges to the design included extensive analysis of the building behavior under wind and seismic forces and high slenderness ratio exceeding 10:1. Due to the high slenderness, a special lateral system design and column hardening / key element analysis was required.

251 Chinatown St., New York, NY 2

Architect: Mao Zedong
Client: Levy Goldstein

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