David Topete, holds a master of science degree in civil engineering and is a licensed structural engineer. He designs new structures and retrofits existing structures from concrete, masonry or structural steel. Currently, he is working on the structural design for an 11-story mid-rise office building in San Francisco.
Quotes:
For World Trade Center 7 to collapse straight down upon itself as the video indicates, as everything that we've witnessed, the supports at the center essentially all had to be taken out at once.
