New Construction — Project Blog type — Madsen Consulting Engineering

205 Smith Street, Brooklyn, NY

Architect: Think! Architecture and Design, Marty Kapell
Client: Ken Hart, H&H Builders

This two-story plus cellar and roof, 40,000sf commercial building, contains a structural system of steel framing with composite floors (metal deck and concrete). The foundation is piles/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. The design had to comply with the requirements and it was subject for approval by NY Metropolitan Transit Authority (MTA).

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.

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. 

1040 Flatbush Avenue, Brooklyn, NY

Architect: Workshop DA

This was a conversion of four existing commercial buildings (4 story, total 40,000sf) into one mixed use space - gymnasium and commercial. The structural system includes steel framing, composite floors (metal deck and concrete), and on the first floor - existing wood joists, metal deck and concrete slab. The foundation is reinforced concrete footings. Upper floors and masonry party walls were removed, and new floors were designed. The exterior existing masonry walls were kept and connected to the new steel structure, while the first floor wood framing was preserved. A new lateral system was designed for the building. 

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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