The Indiana State Fair Commission is hiring New York-based engineering company Thornton Tomasetti Inc. to investigate Saturday’s deadly stage collapse, officials said Tuesday.

The Indiana State Fair on Tuesday said it has hired an engineering firm to investigate why a stage was toppled by fierce winds Saturday night, killing five people and injuring dozens. The investigation will be run by Scott Nacheman, who heads the Chicago office of Thornton Tomasetti Inc., an international engineering firm that has worked on projects in 42 countries.

Speaking to ConstructionWeek, Bob Sinn, principal at engineering firm Thornton Tomasetti, said: “At extreme heights, the main challenges are along practical and architectural lines, not material or structural.

WTTW talks with Chicago architect Adrian Smith, who, along with his firm, has been picked to design the world’s tallest building — to be built in Saudi Arabia.

The 1km-high Kingdom Tower to be built in Jeddah represents “an evolution and a refinement of an architectural continuum of skyscraper design,” according to Gordon Gill from Adrian Smith + Gordon Gill Architecture (AS+GG).

Saudi Arabia unveiled plans Tuesday to build the world’s tallest tower — a mixed-use structure that will rise two-thirds of a mile high — in the Red Sea port city of Jeddah.

Taipei 101, one of the world’s tallest buildings, is also now the world’s greenest skyscraper.

About half of the steel is now in place at the Barclays Center, as NY1 saw on a recent tour with developer Bruce Ratner.

The new Winspear Opera House in Dallas redefines the essence of an opera house for the twenty first century, breaking down barriers to make opera more accessible for a wider audience.

Craig Hodgetts and Hsinming Fung discuss their new animal-like performance space for the California Institute of the Arts.

Baha Mar, billed as the largest single-phase resort development in the history of the Caribbean, celebrated another milestone with the driving of the first of 5,700 pilings on yesterday.

In what must be record time, the University of Pennsylvania Health System and the University of Pennsylvania School of Medicine (collectively known as Penn Medicine) have recently completed the second phase of the Perelman Center for Advanced Medicine.