The companies will continue to develop systems that use the lifting of large composite blocks and the pumping of water to store potential energy for later power generation.
The Smithsonian museum on the National Mall in Washington, originally designed by SOM in the 1970s, is undergoing a three-stage upgrade and expansion as visitor numbers grow.
A structural engineering pioneer and innovator who has changed tall building design for more than 30 years, Robert Halvorson is ENR Midwest's 2020 Legacy Award winner.