Fort Mason – SEATS

JW4 by J. Weiss Design

“In WWI & WWII, concrete ship building was pioneered in Oakland. Our dry docked SEAT uses a new high-performing concrete that allows for greater, thinner spans.”

Jennifer Weiss has over 18 years of architecture-related experience, including working for the architecture firms Skidmore, Owings & Merrill, KMD Architects, and Levy Design Partners, as well as for the General Contractor Ryan Associates as a construction Project Manager. She earned a Master of Architecture from Harvard University, and a Bachelor of Arts in both Architecture and Art History from Columbia University. Ms. Weiss also studied Architecture and Art History for one year in Paris, France through Columbia University. She has been a member of the Harvard University Graduate School of Design Alumni Council, and has been admitted to the American Institute of Architects as an Associate.

The type of concrete used in this seat is Ductal. Ductal is a proprietary pre-mixed ultra-high performance concrete whose physical characteristics exceed those of common concrete used in the construction of buildings. It is manufactured by Lafarge and Bouygues. Ductal has high compressive strength and flexural resistance compared to other concretes. It also has high durability, abrasion resistance, and chemical/environmental resistances (e.g. freeze and thaw, salt water, etc.). Due to these properties, Ductal can be used in thinner cross-sections and in more varied applications than common concrete. Ductal is almost self placing and is best suited for precast elements or in-situ repair or upgrade works. The constituents of Ductal are cement, fine sand, silica fume and silica flour as a filler, additive and water, using a low water cement ratio and may include high-strength steel fibres or non-metallic fibres.