Center 21

Location
Oakland, CA
Owner
Ellis Partners
Architect
Wright Heerema Architects
Contractor
Charles Pankow Builders
Sustainability
LEED Gold
Services/Project Type
Structural Engineering
Buildings
Center 21 at 2100 Franklin is a 215,000-gsf, 9-story steel framed office building over one level of subterranean parking. The steel framing system employs a special moment resisting frame with deep columns in the longitudinal direction and special concentric braced frames in the transverse direction. The deep column moment frames were approved through Oakland’s AMMR process. The exterior cladding consists of pre-cast panels and ribbon windows. There is a 9-story atrium in the building. The project is on a pile-supported foundation. In addition to the new construction, KPFF provided pre-cast panel modifications to the adjacent 20-story Webster tower. Center 21 is certified LEED Gold. 
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