Council on Tall Buildings and Urban Habitat
Council on Tall Buildings and Urban Habitat

About Leonard Joseph

With more than 40 years of experience, Leonard Joseph has analyzed, designed and reviewed high-rise buildings, sports facilities, hangars, hotels, historic buildings, manufacturing facilities, and parking garages. He works with a wide variety of materials, including structural steel, reinforced concrete, precast and post-tensioned concrete, masonry, wood, and light gage framing. For buildings around the world, Len deals with seismic, wind and other environmental hazards, and incorporates local construction practices into his designs.

His project credits include Wilshire Grand Center, a 335-meter mixed-use tower with Buckling Restrained Brace outriggers in a high seismic zone; Shanghai Tower, a 600-meter mixed-use tower; Taipei 101; Ping An International Financial Center, a 660-meter office tower; and the Petronas Twin Towers. Currently, Len is working on the Jeddah Tower, a 1,000-meter mixed-use…


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About Leonard Joseph

With more than 40 years of experience, Leonard Joseph has analyzed, designed and reviewed high-rise buildings, sports facilities, hangars, hotels, historic buildings, manufacturing facilities, and parking garages. He works with a wide variety of materials, including structural steel, reinforced concrete, precast and post-tensioned concrete, masonry, wood, and light gage framing. For buildings around the world, Len deals with seismic, wind and other environmental hazards, and incorporates local construction practices into his designs.

His project credits include Wilshire Grand Center, a 335-meter mixed-use tower with Buckling Restrained Brace outriggers in a high seismic zone; Shanghai Tower, a 600-meter mixed-use tower; Taipei 101; Ping An International Financial Center, a 660-meter office tower; and the Petronas Twin Towers. Currently, Len is working on the Jeddah Tower, a 1,000-meter mixed-use building in Jeddah, Saudi Arabia.

Active in technical development and teaching, he lectures and writes articles and books on structure for both technical and general audiences. He has more than two dozen technical papers and abstracts to his credit. He is a licensed structural engineer in California and a licensed professional engineer in California, Nevada, New York and Washington.

Len graduated from Cornell University with a bachelor’s degree in civil engineering, and from Stanford University with an MBA and a master’s degree in structural engineering.

CTBUH Involvement

  • Working Group: Outrigger Design, Co-Chair (2016 – Present, 2011 – 2012)

Leonard Joseph Related Resources

Tall Buildings: Sustainable Design Opportunities

3 Mar 2008 – CTBUH 2008 8th World Congress, Dubai
Akbar Tamboli, Thornton Tomasetti

Wilshire Grand: Outrigger Designs and Details for a Highly Seismic Site

Mar 2016 – International Journal of High-Rise Buildings Volume 5 Number 1
Leonard M. Joseph, C. Kerem Gulec, and Justin M. Schwaiger, Thornton Tomasetti

Overview of Seismic Loads and Application of Local Code Provisions for Tall Buildings in Baku, Azerbaijan

Mar 2014 – International Journal of High-Rise Buildings Volume 3 Number 1
Hi Sun Choi, Onur Ihtiyar & Leonard Joseph, Thornton Tomasetti; James Sze, Arup

Outrigger System Design Considerations

Sep 2012 – International Journal of High-Rise Buildings Volume 1 Number 3
Hi Sun Choi and Leonard Joseph, Thornton Tomasetti

See all papers/research

Leonard Joseph Related Papers/Research

Wilshire Grand: Outrigger Designs and Details for a Highly Seismic Site
Mar 2016 – International Journal of High-Rise Buildings Volume 5 Number 1; Leonard M. Joseph, C. Kerem Gulec, and Justin M. Schwaiger, Thornton Tomasetti
The 335 m tall Wilshire Grand Center tower under construction in Los Angeles illustrates many key outrigger issues. The tower has a long, narrow floor plan and slender central core. Outrigger braces at three groups of levels in the tower help provide…
Overview of Seismic Loads and Application of Local Code Provisions for Tall Buildings in Baku, Azerbaijan
Mar 2014 – International Journal of High-Rise Buildings Volume 3 Number 1; Hi Sun Choi, Onur Ihtiyar & Leonard Joseph, Thornton Tomasetti; James Sze, Arup
Baku, the capital of Azerbaijan, has seen a boom in construction in recent years. The old Baku city has been rapidly transforming into a new hub of high-rise buildings and lively cultural centers hosting the Euro Vision Song Contest in 2012 and…
Outrigger System Design Considerations
Sep 2012 – International Journal of High-Rise Buildings Volume 1 Number 3; Hi Sun Choi and Leonard Joseph, Thornton Tomasetti
Outrigger systems have been widely used in supertall buildings constructed since the 1980’s, eclipsing previously favored tubular frame systems. However, outriggers are not listed as a seismic lateral load resisting system in any code. Design…
Anything Goes?
Mar 2012 – International Journal of High-Rise Buildings Volume 1 Number 1; Dennis Poon and Leonard Joseph, Thornton Tomasetti
When Cole Porter wrote the song “Anything Goes” in 1934, he did not include skyscraper examples. The recently completed Chrysler and Empire State buildings followed decades of tall building development in a logical and predictable line. Today,…
Tall Buildings: Sustainable Design Opportunities
Mar 2008 – CTBUH 2008 8th World Congress, Dubai; Akbar Tamboli, Leonard Joseph, Umakant Vadnere & Xiao Xu, Thornton-Tomasetti Group
This paper describes three major tall buildings focusing on their incorporation of sustainable structural designs.
Structural Design of Taipei 101, the World's Tallest Building
Oct 2004 – CTBUH 2004 Seoul Conference; Dennis C. K. Poon & Leonard M. Joseph, Thornton Tomasetti; Shaw-Song Shieh & Ching-Chang Chang, Evergreen Consulting Engineering
This paper examines the structural design of the Taipei 101 tower, 101 stories and 508 m above grade, was the newest World’s Tallest Building at the time this paper was written.