San Francisco Federal Building

San Francisco
Height
1
To Tip:

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest point of the building, irrespective of material or function of the highest element (i.e., including antennae, flagpoles, signage and other functional-technical equipment).

71.3 m / 234 ft
2
Architectural:

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of the building, including spires, but not including antennae, signage, flag poles or other functional-technical equipment. This measurement is the most widely utilized and is employed to define the Council on Tall Buildings and Urban Habitat (CTBUH) rankings of the "World's Tallest Buildings."

71.3 m / 234 ft
Floors
Above Ground

The number of floors above ground should include the ground floor level and be the number of main floors above ground, including any significant mezzanine floors and major mechanical plant floors. Mechanical mezzanines should not be included if they have a significantly smaller floor area than the major floors below. Similarly, mechanical penthouses or plant rooms protruding above the general roof area should not be counted. Note: CTBUH floor counts may differ from published accounts, as it is common in some regions of the world for certain floor levels not to be included (e.g., the level 4, 14, 24, etc. in Hong Kong).

18
1 2 San Francisco Federal Building Outline
Height 71.3 m / 234 ft
Floors 18
Official Name
The current legal building name.

San Francisco Federal Building

Type
CTBUH collects data on two major types of tall structures: 'Buildings' and 'Telecommunications / Observation Towers.' A 'Building' is a structure where at least 50% of the height is occupied by usable floor area. A 'Telecommunications / Observation Tower' is a structure where less than 50% of the structure's height is occupied by usable floor area. Only 'Buildings' are eligible for the CTBUH 'Tallest Buildings' lists.

Building

Status
Completed
Architecturally Topped Out
Structurally Topped Out
Under Construction
Proposed
On Hold
Never Completed
Vision
Competition Entry
Canceled
Proposed Renovation
Under Renovation
Renovated
Under Demolition
Demolished

Completed

Completion

2007

Country
The CTBUH follows the United Nations's definition of Country, and thus uses the lists and codes established by that organization.

United States

City
The CTBUH follows the United Nations's definition of City, and thus uses the lists and codes established by that organization.

San Francisco

Function
A single-function tall building is defined as one where 85% or more of its usable floor area is dedicated to a single usage. Thus a building with 90% office floor area would be said to be an "office" building, irrespective of other minor functions it may also contain.

A mixed-use tall building contains two or more functions (or uses), where each of the functions occupy a significant proportion of the tower's total space. Support areas such as car parks and mechanical plant space do not constitute mixed-use functions. Functions are denoted on CTBUH "Tallest Building" lists in descending order, e.g., "hotel/office" indicates hotel function above office function.

office

Structural Material
Steel
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from steel. Note that a building of steel construction with a floor system of concrete planks or concrete slab on top of steel beams is still considered a “steel” structure as the concrete elements are not acting as the primary structure.

Reinforced Concrete
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from concrete which has been cast in place and utilizes steel reinforcement bars.

Precast Concrete
Both the main vertical/lateral structural elements and the floor spanning system are constructed from steel reinforced concrete which has been precast as individual components and assembled together on-site.

Mixed-Structure
Utilizes distinct systems (e.g. steel, concrete, timber), one on top of the other. For example, a steel/concrete indicates a steel structural system located on top of a concrete structural system, with the opposite true of concrete/steel.

Composite
A combination of materials (e.g. steel, concrete, timber) are used together in the main structural elements. Examples include buildings which utilize: steel columns with a floor system of reinforced concrete beams; a steel frame system with a concrete core; concrete-encased steel columns; concrete-filled steel tubes; etc. Where known, the CTBUH database breaks out the materials used in a composite building’s core, columns, and floor spanning separately.

concrete

Height
Architectural
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of the building, including spires, but not including antennae, signage, flag poles or other functional-technical equipment. This measurement is the most widely utilized and is employed to define the Council on Tall Buildings and Urban Habitat (CTBUH) rankings of the "World's Tallest Buildings."

71.3 m / 234 ft

To Tip
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest point of the building, irrespective of material or function of the highest element (i.e., including antennae, flagpoles, signage and other functional-technical equipment).
71.3 m / 234 ft
Floors Above Ground
The number of floors above ground should include the ground floor level and be the number of main floors above ground, including any significant mezzanine floors and major mechanical plant floors. Mechanical mezzanines should not be included if they have a significantly smaller floor area than the major floors below. Similarly, mechanical penthouses or plant rooms protruding above the general roof area should not be counted. Note: CTBUH floor counts may differ from published accounts, as it is common in some regions of the world for certain floor levels not to be included (e.g., the level 4, 14, 24, etc. in Hong Kong).

18

# of Parking Spaces
Number of Parking Spaces refers to the total number of car parking spaces contained within a particular building.

114

Tower GFA
Tower GFA refers to the total gross floor area within the tower footprint, not including adjoining podiums, connected buildings or other towers within the development.

56,206 m² / 604,996 ft²

Construction Schedule
2002

Construction Start

2007

Completed

Structural Engineer
Design

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.

MEP Engineer
Design

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

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).

Building Monitoring
Façade

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.

Architect
Design

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.

Morphosis
Architect of Record

Usually takes on the balance of the architectural effort not executed by the "Design Architect," typically responsible for the construction documents, conforming to local codes, etc. May often be referred to as "Executive," "Associate," or "Local" Architect, however, for consistency CTBUH uses the term "Architect of Record" exclusively.

SmithGroup
Structural Engineer
Design

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.

MEP Engineer
Design

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.

Contractor
Main Contractor

The main contractor is the supervisory contractor of all construction work on a project, management of sub-contractors and vendors, etc. May be referred to as "Construction Manager," however, for consistency CTBUH uses the term "Main Contractor" exclusively.

Hunt Construction Group, Inc.
Other Consultant

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).

Building Monitoring
Façade

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.

CTBUH Awards & Distinctions

10 Year Award 2017 Award of Excellence

2017 CTBUH Awards

Videos

31 May 2018 | San Francisco

Interview: Maria Ciprazo & Eui-Sung Yi | San Francisco Federal Building

Maria Ciprazo, Director of Design and Construction of the General Services Administration, and Eui-Sung Yi, Principal pf Morphosis, are interviewed by Chris Bentley regarding the...

Research

01 August 2013

The Use of Stainless Steel in Second-Skin Façades

Catherine Houska, TMR Consulting

Exterior walls are being transformed from relatively simple climate-defensive mechanisms to more active membranes that screen weather to reduce energy requirements.

About San Francisco Federal Building

The San Francisco Federal Building is an office building for the U.S. Federal Government. Designed as part of the General Services Administration’s Design Excellence Program, the project consists of an 18-story tower of reinforced concrete, a 4-story steel braced frame annex building, and a stand-alone pavilion for a restaurant.

To support the GSA’s commitment to incorporating energy efficiency and sustainability, the team proposed a design based largely on energy reduction through natural ventilation, taking advantage of the temperate Bay area climate. Exposed thermal mass was required to supplement the natural cooling, absorbing heat from computers, people and lighting. However, downturned concrete beams would have disrupted the airflow required to cool the slab, while also blocking light. A solution of upturned beams creates an unobstructed soffit across which air flows unimpeded, promoting heat transfer. The ribbed slabs that span between the upturned beams have a wave profile varying from 12-5/8 to 4-3/4 inches to reduce mass, increase air contact surface area, improve lighting by eliminating shadows and enhance the spaces aesthetically. At night, computer-controlled windows behind the scrim open, allowing the evening air to flow through the building and cool the concrete.

A narrow 20-meter (66-foot) floor plate allows for wind-driven natural ventilation. A thinned slab at the perimeter edge maximizes window height assisting with daylight penetration. The project’s tower building will consume 33% less energy compared to an office building design under the same California energy code.

CTBUH Awards & Distinctions

10 Year Award 2017 Award of Excellence

2017 CTBUH Awards

31 May 2018 | San Francisco

Interview: Maria Ciprazo & Eui-Sung Yi | San Francisco Federal Building

Maria Ciprazo, Director of Design and Construction of the General Services Administration, and Eui-Sung Yi, Principal pf Morphosis, are interviewed by Chris Bentley regarding the...

30 May 2018 | San Francisco

A Towering, Bold Statement About Government’s Relationship with its People and the Environment

To support the GSA’s commitment to incorporating energy efficiency and sustainability, the team proposed a design based largely on energy reduction through natural ventilation, taking...