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Millennium Tower
301 Mission Street
Building
Completed, 2009
94105
residential
concrete
196.6 m / 645 ft
58
4
440
355
14
106,933 m² / 1,151,017 ft²
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Construction Start
Completed
The Design Engineer is usually involved in the front end design, typically taking the leadership role in the Schematic Design and Design Development, and then a monitoring role through the CD and CA phases.
Other Consultant refers to other organizations which provided significant consultation services for a building project (e.g. wind consultants, environmental consultants, fire and life safety consultants, etc).
These are firms that consult on the design of a building's façade. May often be referred to as "Cladding," "Envelope," "Exterior Wall," or "Curtain Wall" Consultant, however, for consistency CTBUH uses the term "Façade Consultant" exclusively.
You must be a CTBUH Member to view this resource.
Usually involved in the front end design, with a "typical" condition being that of a leadership role through either Schematic Design or Design Development, and then a monitoring role through the CD and CA phases.
The Design Engineer is usually involved in the front end design, typically taking the leadership role in the Schematic Design and Design Development, and then a monitoring role through the CD and CA phases.
Other Consultant refers to other organizations which provided significant consultation services for a building project (e.g. wind consultants, environmental consultants, fire and life safety consultants, etc).
These are firms that consult on the design of a building's façade. May often be referred to as "Cladding," "Envelope," "Exterior Wall," or "Curtain Wall" Consultant, however, for consistency CTBUH uses the term "Façade Consultant" exclusively.
301 Mission Street, also known as Millennium Tower, is one of the tallest reinforced concrete structure situated in a seismic zone 4 region. The tower’s height posed many challenges and required the creative use of technologies and cutting edge innovations.
In order to meet the owner’s floor height limits, W-sec steel link beams were used as the shearwall core coupling beams. Conventional diagonally reinforced coupling beams would have required significantly more depth. The embedded region of the beam extends 1.2 meters (4ft) into the wall and transfers the beam moment by bearing on the concrete above and below the embedded beam. Conventional ties which are closely spaced in columns and beams can make it nearly impossible to place concrete. A tie system of welded grid reinforcement known as Baugrid was used, which eliminates all hooks and significantly reduces the volume of rebar. All shearwall boundary elements, Special Moment Resisting Frame columns and beams utilize the Baugrid system. The flanges of the shearwall core are reinforced by continuous Baugrids providing resistance for confinement and shear.
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